ASHRAE S 62 A n VENTILATION COMPLIANCE EVALUATION · 2004. 10. 6. · Mechanical Option Technical Assignment #1 ... The Ventilation Rate Calculation Procedure of Section 6 of the

ASHRAE STANDARD 62 WITH ADDENDUM n VENTILATION COMPLIANCE EVALUATION

Alicia Carbin

Mechanical Option Longwood University’s

New Science Building in Farmville, VA Technical Assignment #1

10-6-04

TABLE OF CONTENTS . 1.0 Executive Summary…….…...……………………………..……….…..1

2.0 ASHRAE 62 and Addendum n……………………...…….…...……….2

3.0 Building Ventilation System ..…………………….………...……...…..4

4.0 Compliance to ASHRAE Standard 62 …….……….………….…...…..6

5.0 Compliance to Addendum n……..…………….………………..…........9 6.0 Discussion of Compliance Conclusions…………………………….…14

7.0 Appendices

Appendix A……………..……………………………………..…..15

Appendix B………………….………………………………..……16

Appendix C………………….………………………………..……19

Appendix D………………….………………………………..……21

Appendix E………………….………………………………..……23

8.0 References…….……………………………………...………………..24

Alicia B. Carbin Mechanical Option Technical Assignment #1 Primary Faculty Consultant: Dr. Srebric Longwood University’s New Science Building – Farmville, VA

Page 1

1.0 EXECUTIVE SUMMARY . It is already known that Longwood University’s New Science Building complies

with the ASHRAE Standard 62. The ventilation design was specifically designed to meet

this standard; however, it was designed before addendum n of Standard 62 was

published. The purpose of this report is to evaluate weather the science building meets

the outdoor air requirements and complies with the ASHRAE Standard 62 and addendum

n revisions. In addition, this report compares the outdoor air requirements of ASHRAE

Standard 62 before and after addendum n was introduced.

By using the Ventilation Rate Procedure revised in addendum n, it was

determined that all of the air-handling units in the ventilation system of the science

building comply with the standard. It was found that the 30% outdoor air provided by

AHU-1 was twice as much as the amount required by addendum n (15%). Even though

all other units supply 100% outdoor air, and obviously comply with the standard, the

required amount of outdoor air set by addendum n were calculated in this report as well.

The calculations for the design of required outdoor air to the science building can

be found in section 4.0 of this report. The calculations for the required amount of

outdoor air from the revisions to the Ventilation Rate Procedure in addendum n, can be

found in section 5.0. Section 6.0 discusses the comparison of data, and the compliance to

the standard.


Page 2

2.0 ASHRAE 62 AND ADDENDUM n .

As defined in Section 1 of the ASHRAE Standard 62, the purpose of the standard is

to "specify minimum ventilation rates and indoor air quality that will be acceptable to

human occupants and are intended to minimize the potential for adverse health effects."

Designing and operating a building to this the ASHRAE Standard 62 will minimize IAQ

liability and help assure an acceptable indoor environment. ASHRAE Standard 62

specifies two procedures to obtain acceptable indoor air quality within Section 4.

Designers must choose to use and claim compliance under one procedure, not a

combination of the two. The two procedures described in the ASHRAE Standard 62 are

the “Ventilation Rate Calculation Procedure” or the “Indoor Air Quality Procedure.”

The Ventilation Rate Procedure supplies each occupied zone with ventilation air of

a specific quality and quantity. In this procedure, outdoor air is used to dilute predictable

contaminants to acceptable concentration levels. Table 2 lists minimum ventilation rates

for varying occupancy types and uses of space. This procedure is an indirect approach to

determining acceptable air quality in spaces. If the required rates of acceptable outdoor air

in Table 2 of the standard are provided to the occupied zone, the indoor air quality is

considered acceptable.

The Indoor Air Quality Procedure also achieves an acceptable air quality. This

procedure incorporates both quantitative and subjective evaluation to describe the

acceptable indoor air quality of a zone, and is therefore a more direct procedure than the

Ventilation Rate Procedure. It sets limits on the concentration of known contaminants,

found in Table 1 of the standard, to determine acceptable outdoor air quality limits based

on odor levels. It describes the use of treated re-circulated air to reduce the minimum

outdoor airflow rates presented in the standard.


Page 3

The major difference between these two procedures is the requirement of follow-

up monitoring of the system after it has been installed. The Indoor Air Quality Procedure

requires monitoring and relies on the intended use of the space. The Ventilation Rate

Procedure does not require monitoring once the system in installed. For this reason,

designers usually design a system to comply with the Ventilation Rate Procedure.

The Ventilation Rate Calculation Procedure of Section 6 of the ASHRAE

Standard 62 is revised by addendum n. It is this procedure, with the addendum n

revisions that are used in this report to determine weather Longwood University’s New

Science Building meets the minimum outdoor air requirements set by the standard.

Addendum n was developed to reflect the latest technical information that has

become available since the development of the “Ventilation Rate Calculation Procedure.”

The most significant changes made to the ventilation requirements occur in densely

occupied spaces, which have been criticized for being much higher than needed.

Addendum n greatly simplifies the multiple spaces calculations required in Standard 62

for the bulk of design. It also includes a more detailed approach for those who choose to

use it. Addendum n includes both a people component and an area component in the

calculations. To make application of these new calculation methods easier for designers

and the users of the standard, a spreadsheet was made that is available from the ASHRAE

website. That spreadsheet, called 62n-VRP.xls was used in determining compliance to

the ASHRAE Standard 62 with addendum n in this report.


Page 4

3.0 BUILDING VENTILATION SYSTEM SUMMARY . The ventilation system of the science building uses conditioned outside air

provided by multiple variable air volume air handling units and distributed to the

conditioned spaces throughout the building by air distribution ductwork. All of the air-

handling units are located on the roof.

Classrooms and office spaces in the science building will be heated and cooled by

variable air volume air handling units with fan powered variable air volume terminal

units. The air supplied to these spaces will be re-circulated. The amount of ventilation

air for all non-laboratory spaces were determined in the design by the multiple spaces

equation identified in ASHRAE 62-2001. The minimum rate of ventilation are provided

at all part load operating conditions. Laboratory spaces in the science building will be

heated and cooled by variable air volume air handling units with non-fan powered

variable air volume terminal units working in conjunction with the general and hood

exhaust in the labs. The supply air to the laboratory spaces will be 100% outside air.

These spaces are not permitted to have any air re-circulated.

All non-laboratory spaces, which allow re-circulation of air, will be served by

AHU-1. All laboratory and laboratory support spaces, which do not allow re-circulation

of air, are provided with 100% outside air and are served by AHU-2 and AHU-3. Those

spaces on the west side of the building are served by AHU-2, and those spaces on the east

side of the building are served by AHU-3. The laboratories are located on the upper

floors of the science building to reduce the amount of large ductwork to the roof. The

space requiring the largest amount of hood exhaust is the organic chemistry lab on the 4th

floor. This lab is served by AHU-4, which provides 100% outside air to the space. The

green house is served by three evaporative cooling units, EC-1, EC-2 and EC-3 which all

supply 100% outside air.


Page 5

These floor plans show which spaces are supplied by which units:


Page 6

4.0 COMPLIANCE TO ASHRAE STANDARD 62 .

Summary of Design Air flow (in compliance with ASHRAE Standard 62)

Unit Serves cfm OA min cfm AHU-1 Non Laboratory spaces 30,535 9,965 (33%) AHU-2 Laboratory spaces (west) 19,470 19,470 (100%) AHU-3 Laboratory spaces (east) 29,430 29430 (100%) AHU-4 Organic Chemistry Lab (4th floor) 9,400 9,400 (100%) EC-1 Greenhouse 12,000 12,000 (100%) EC-2 Greenhouse 12,000 12,000 (100%) EC-3 Greenhouse 7,210 7,210 (100%)

*Non-laboratory spaces include: Classrooms, corridors, exhibit spaces, lounges, storage, offices, and toilets *Laboratory Spaces include: Laboratories and lab preparation areas

The occupancy values and outside air requirements for the science building were

found in Table 2.2 “Institutional Facilities” of Section 6 in the ASHRAE Standard 62.

Those value for spaces not found specifically in Table 2.2 were approximated based on

similar spaces. For example, “Seminar” was not found in Table 2.2, but the value for

“Classroom” was used in this case. The occupancy and fresh air (outside air)

requirements that were assumed are listed in the table below. One of the reasons for the

development of addendum n was to provide better estimates of these values.

Space Name

Classrooms Corridors

Exhibit Space Lounge

Misc./Storage Offices Toilets

Laboratories Lab Prep areas

Std. 62 Classification

Classroom (2.2) Corridor (2.2) Corridor (2.2)

Office Space (2.1) Storage Rooms (2.1) Office Space (2.1)

Public Restrooms (2.1) Laboratory (2.2) Laboratory (2.2)

Occupancy Requirements

50 (ft2/person) N/A N/A

50 (ft2/person) N/A

7 (ft2/person) N/A

30 (ft2/person) 30

Fresh Air Requirements

15 (cfm/person) 0.1 (cfm/ft2) 0.1 (cfm/ft2)

20 (cfm/person) 0.15 (cfm/ft2)

20 (cfm/person) 50 (cfm/person) 20 (cfm/person) 20 (cfm/person)


Page 7

To find the minimum outside air required for ventilation of the science building, the

multiple spaces equation of Section 6 is used. This equation only applies to the spaces

which allow re-circulating air (the non-laboratory related spaces). For the spaces that

require 100% outside air (the laboratory related spaces and the greenhouse), we already

know that these spaces are receiving the minimum required by ASHRAE Standard 62.

Therefore, we do not need to include them in our calculations.

The Multiple Spaces Equation:

Y = X . (1+X-Zc)

where: Y = Vot = corrected fraction of outdoor air in system supply Vst

X = Von = uncorrected fraction of outdoor air in system supply Vst Zc = Voc = fraction of outdoor air in critical space

Vsc {the critical space is the space with the greatest required fraction of outdoor air in the supply to this space}

and:

Vot = corrected total outdoor air flow rate (cfm) Vst = total design supply flow rate {i.e. the sum of all supply for all braches of

the system} (cfm) Von = sum of outdoor air flow rates for all braches on the system (cfm) Voc = outdoor air flow rate required in critical spaces (cfm) Vsc = supply flow rate in critical space (cfm)


Page 8

Calculations for AHU-1 using the multiple spaces equation:

Vot = 9,965 cfm Vst = 30,526 cfm Von = 5,770 cfm Voc = 720 cfm (for the critical zone) Vsc = 1175 cfm (for the critical zone) X = Von = 5570 cfm = 0.189 Vst 30526 cfm Zc = Voc= 720 cfm = 0.61 (for the critical zone) Vsc 1175 cfm Y = X . = 0.189 . = 0.326

(1+X-Zc) (1+0.189-0.61)

Y = Vot = 9965 cfm = 0.326 Vst 30,526 cfm

These values were solved using a spreadsheet. Appendix A of this report shows

this spreadsheet with the values used to solve the multiple spaces equation of AHU-1.

The critical zone was found to be a classroom, with a Z critical value of 0.61. The results

show that the minimum OA required by ASHRAE Standard 62 is 9,965 cfm, which is

33% of the total OA supplied by the unit.


Page 9

5.0 COMPLIANCE TO ADDENDUM n . .

Summary of Minimum Airflow Needed (in compliance with ASHRAE Standard 62 with addendum n)

Unit Serves cfm OA min cfm AHU-1 Non Laboratory spaces 30,535 4,580 (15%) AHU-2 Laboratory spaces (west) 19,470 -15,640 (-80%) AHU-3 Laboratory spaces (east) 29,430 7,874 (27%) AHU-4 Organic Chemistry Lab (4th floor) 9,400 641 (7%) EC-1 Greenhouse 12,000 Not calculated EC-2 Greenhouse 12,000 Not calculated EC-3 Greenhouse 7,210 Not calculated

*Non-laboratory spaces include: Classrooms, corridors, exhibit spaces, lounges, storage, offices, and toilets *Laboratory Spaces include: Laboratories and lab preparation areas

The spreadsheet used to determine the minimum outdoor air requirements use the

revised Ventilation Rate Procedure defined in sections 6.2 of addendum n. To use this

spreadsheet, the following equations and values were used:

Vot = ∑Voz (the OA intake flow that the ventilation system should be designed for)

where: Voz =Vbz/Ez Vbz** = (Rp*Pz) + (Ra*Az) (the breathing zone OA required in a zone) Ez** =1.0 (zone air distribution effectiveness for ceiling supply of air)

and: Az =the floor area of each zone Pz =the zone population Rp =OA rate required per person as determined by Table 6.1 in addendum n Ra =OA rate required per unit area as determined by Table 6.1 in addendum n


Page 10

For multi-zone re-circulating systems, addendum n requires that Vot is

determined in accordance with the following equations:

Vot = Vou/Ev (the OA intake flow that the multi-zone re-circulating ventilation

system should be designed for) where:

Vou** = D*∑all zones RpPz + *∑all zones RaAz (uncorrected OA intake) Ev =system ventilation efficiency (determined by Table 6.3 based on the

value of Zp) and:

D =Ps / ∑all zones Pz (occupant diversity) Ps =the total population served by the system Pz =the zone population Rp =OA rate required per person as determined by Table 6.1 in addendum n Ra =OA rate required per unit area as determined by Table 6.1 in addendum n Az =the floor area of each zone Zp = Voz /Vpz (zone primary OA fraction) Voz =Vbz/Ez Vpz =the minimum expected primary airflow to the zone from the air handler

including OA and re-circulated return air (for VAV systems)

**values that are also used in Appendix G


Page 11

When the value of Zp max if fount to be >0.55, Ev cannot be found in Table 6.3. Appendix G is needed in this case to calculate a more practical the value of Ev:

Ev = minimum (Evz) where:

Evz =1 + Xs - Zd (for single supply systems) and:

Xs = Vou/Vps Zd = Voz/Vdzm Vou **DEFINED ABOVE Vps = ∑Vpz (total primary airflow supplied to all zones served by the

system) Voz = Vbz/Ez Vdzm =the minimum expected value Vdz (for VAV systems) Vbz **DEFINED ABOVE Ez **DEFINED ABOVE Vdz =the total design supply airflow to zone (Vpz plus transfer air)

-or- Evz =(Fa + Xs*Fb – Zd*Fc) / Fa (for multi-zone supply systems)

and: Fa = Ep + (1 – Ep)*Er (fraction of supplied transfer air)

Xs **DEFINED ABOVE Zd **DEFINED ABOVE

Fb = Ep (fraction of supply air to the zone from fully mixed primary air) Fc = 1 – (1-Ez) * (1- Er) * (1- Ep) Ep = Vpz/Vdz Er = fraction of secondary re-circulated air to the zone, represented by

average system return air (


Page 12

The spreadsheet provided by ASHRAE to solve the Ventilation Rate Procedure

with addendum n revisions is a great tool to reduce the number of hand calculations. The

minimum outdoor air requirement results for Longwood University’s New Science

Building were calculated using seven different spreadsheets. AHU-1, AHU-2, and AHU-

3 required two spreadsheets: one to determine Zp and one to determine Ev and Vot by

using the equations in Appendix G. It was only necessary to use one spreadsheet to

calculate Vot for AHU-4 since Appendix G was not needed in this case. The results of

the spreadsheets are summarized in the following paragraphs.

AHU-1

The critical zone of AHU-1 was found to be 1-108A which serves a classroom.

The Z critical value (Zp) of this zone is 1.39. Since this value is greater than 0.55,

appendix G was needed to calculate the value of the system ventilation efficiency (Ev).

Ev is found to be 1.03 in this case, which allows us to solve for the outdoor airflow that

must be provided to the zone by the supply air distribution system. Vot is found to be

4,580 cfm, which is the minimum outdoor air requirement for AHU-1. This is found to

be 15% of the supply air provided by the unit. The spreadsheets used to calculate these

values can be found in appendix B.

AHU-2

The critical zone of AHU-2 was found to be 2-304 which serves the Ecology

laboratory preparation area. The Z critical value (Zp) of this zone is 1.52. Since this

value is greater than 0.55, appendix G was needed to find that Ev=-0.17. This value is an

error, which comes from the fact that the Evz (system ventilation efficiency) was less

than zero in the critical space. Therefore, it can be seen that the amount of outdoor air

supplied to this critical space for the specified number of occupants is not effective. The

spreadsheets used to calculate these values can be found in appendix C.


Page 13

AHU-3

The critical zone of AHU-3 was found to be 3-402 which serves a faculty research

room. The Z critical value (Zp) of this zone is 1.16. Since this value is greater than 0.55,

appendix G was needed to find that Ev=0.40. The Ev value allows us to solve for the

outdoor airflow that must be provided to the zone by the supply air distribution system

Vot is found to be 7,874 cfm, which is the minimum outdoor air requirement for AHU-3.

This is found to be 27% of the supply air provided by the unit. The spreadsheets used to

calculate these values can be found in appendix D.

AHU-4

There are only two zones served by AHU-4, and they are identical to one another.

The Z critical value (Zp) of one of the zones was found to be 0.37. Since this value is

greater than


Page 14

6.0 COMPLIANCE CONCLUSIONS .

The following table compares the Designed minimum OA requirements to the minimum OA requirements required by ASHRAE Standard 62 with addendum n.

Comparison to Designed OA

Unit Serves cfm Design min OA (cfm)

ASHRAE 62n min OA (cfm)

Comply? (Design>62n)

AHU-1 Non Laboratory spaces 30,535 9,965 (33%) 4,580 (15%) Yes AHU-2 Laboratory spaces (west) 19,470 19,470 (100%) -15,640 (-80%) Yes AHU-3 Laboratory spaces (east) 29,430 29430 (100%) 7,874 (27%) Yes AHU-4 Organic Chemistry Lab 9,400 9,400 (100%) 641 (7%) Yes EC-1 Greenhouse 12,000 12,000 (100%) Not calculated Yes EC-2 Greenhouse 12,000 12,000 (100%) Not calculated Yes EC-3 Greenhouse 7,210 7,210 (100%) Not calculated Yes

It can be concluded that all of the air-handling units in the ventilation system of

Longwood University’s New Science Building comply with ASHRAE Standard 62 and

addendum n.

AHU-1, AHU-3, and AHU-4 were found to be compliant with ASHRAE Standard 62 and

addendum n. All VAV boxes for each zone were also met the standard. AHU-2 was found

to need -80% Outside air. This mean that the outdoor air requirement for the critical space

for this system is greater than the flow rate required based on the loads. Overall the AHU-2

does comply with the ASHRAE Standard 62 and addendum n because the amount of OA

being supplied to the space is 100% and it isn’t possible to supply anymore than that.

It was not necessary to calculate the OA requirements for the greenhouse. It is

already known that the EC’s supply 100% OA to the space, and therefore would comply

with the ASHRAE Standard 62 and addendum n.

7.0 Appendicies

APPENDIX A Design Air flow of AHU-1 in compliance with AHRAE Standard 62ASHRAE OA ASHRAE OA Airflow ASHRAE OA ASHRAE OA Airflow

Room Description ft² NO. Requirements (cfm) from VAV Box Z Room Description ft² NO. Requirements (cfm) from VAV Box ZPEOPLE (cfm/person or cfm/ft²) [Voc] [Vsc] (Voc/Vsc) PEOPLE (cfm/person or cfm/ft²) [Voc] [Vsc] (Voc/Vsc)

1-101A 1-306100 - Lounge 307 6 20 120 1065 0.11 337-N&S CORRIDOR/301 ELEV 1,282 1 0.1 128 775 0.171-101B 1-307100-Lounge 308 6 20 120 1560 0.08 322/323/324-FACULTY OFFICES 420 3 20 60 420 0.141-102A 1-308100-EXHIBIT 307 0 0.1 31 915 0.03 311/319/336-NW EXHIBIT 823 0 0.1 82 955 0.091-102B 1-309100-Exhibit 308 0 0.1 31 1560 0.02 318/320/321-FACULTY OFFICES 417 3 20 60 515 0.121-103 1-310103 - Classroom 882 48 15 720 1520 0.47 315-WORKROOM 125 6 15 90 180 0.501-104 1-311104-NMR INSTR/106-CYLINDER STORAGE 360 2 20 40 170 0.24 314/317-FACULTY OFFICES 283 2 20 40 545 0.071-105 1-401109-MACHINE SHOP 350 2 20 40 390 0.10 430-SEMINAR 243 12 10 120 245 0.491-106 1-402110-CLASSROOM 883 48 15 720 1180 0.61 427/428-FACULTY OFFICE 26 417 3 20 60 395 0.151-107 1-403116-A/V STORAGE/117-CLASSROOM 729 24 0.15 109 695 0.16 431/444-FACULTY OFFICES 283 2 20 40 445 0.091-108 1-404118-CLASSROOM 735 48 15 720 1175 0.61 424/425/426-FACULTY OFFICES 280 2 20 40 525 0.081-108 1-405118-CLASSROOM 735 48 15 720 1175 0.61 436/429/432-NE CORRIDOR 798 0 0.1 80 380 0.211-109 1-406114/119/123-N CORRIDOR 842 0 0.1 84 785 0.11 437-N&S CORRIDOR 1,190 0 0.1 119 450 0.261-110 1-407127-N&S CORRIDOR 1,333 0 0.1 133 495 0.27 421/422/423-FACULTY OFFICES 420 3 20 60 415 0.141-201 1-408215-CORRIDOR/216-SEMINAR 341 12 0.1 34 280 0.12 436/412/416-NW CORRIDOR 814 0 0.1 81 925 0.091-202 1-409213-DEPARTMENT CHAIR 150 1 20 20 160 0.13 414-WORKROOM 125 6 15 90 190 0.471-203 1-410217-DEPT CHAIR/214-SECRETARY 483 3 20 60 680 0.09 418/419/420-FACULTY OFFICES 417 3 20 60 520 0.121-204 1-411210-CORRIDOR/212-EXHIBIT 865 0 0.1 87 2190 0.04 413/417-FACULTY OFFICES 283 1 20 20 535 0.041-205212/218-EXHIBIT 819 0 0.1 82 1865 0.04 Sum of ASHRAE OA Requirements (Sum of Voc) [Von] = 5,770 Z critical= 0.6101-206 X= 0.189200/224-N&S CORRIDOR 1,482 0 0.1 148 770 0.19 Sum of Design Supply [Vst] = 30,526 Y= 0.3261-207211-GRADUATE SUITE 884 9 20 180 1505 0.12 Corrected total OA (Vst*Y) [Vot] = 9965 % OA = 33%1-301330/333/336-NE EXHIBIT 798 0 0.1 80 385 0.211-302331-SEMINAR 243 12 10 120 235 0.511-303327/328/329-FACULTY OFFICES 417 3 20 60 540 0.111-304332/347-OFFICE 30 283 2 20 40 495 0.081-305325/326-FACULTY OFFICES 280 2 20 40 330 0.12 Page 15

Zone 1-101A 1-101B 1-102A 1-102B 1-103 1-104 1-105 1-106 1-107 1-108A 1-108B 1-109 1-110 1-201 1-202 1-203 1-204 1-205 1-206 1-207 1-301 1-302 1-303 1-304 1-305 1-306 1-307 1-308 1-309Zone Type Lobbies Lobbies Lobbies Lobbies ClassroomsStorage rooWood/metaClassroomsClassroomsClassroomsClassroomsCorridors Corridors ClassroomsOffice spacOffice spacCorridors Lobbies Corridors Office spacLobbies ClassroomsOffice spacOffice spacOffice space Corridors Office space Lobbies Office spaceAz 307 308 307 308 882 360 350 883 729 735 735 842 1333 341 150 483 865 819 1482 884 798 243 417 283 280 1282 420 823 417Pz 6 6 0 0 48 2 2 48 24 48 48 0 0 12 1 3 0 0 0 9 0 12 3 2 2 1 3 0 3Rp 5 5 5 5 10 0 10 10 10 10 10 0 0 10 5 5 0 5 0 5 5 10 5 5 5 0 5 5 5Ra 0.06 0.06 0.06 0.06 0.12 0.12 0.18 0.12 0.12 0.12 0.12 0.06 0.06 0.12 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.12 0.06 0.06 0.06 0.06 0.06 0.06 0.06Pz*Rp 30 30 0 0 480 0 20 480 240 480 480 0 0 120 5 15 0 0 0 45 0 120 15 10 10 0 15 0 15Az*Ra 18.42 18.48 18.42 18.48 105.84 43.2 63 105.96 87.48 88.2 88.2 50.52 79.98 40.92 9 28.98 51.9 49.14 88.92 53.04 47.88 29.16 25.02 16.98 16.8 76.92 25.2 49.38 25.02Ez 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Voz 48 48 18 18 585.84 43.2 83 585.96 327.48 568.2 568.2 50.52 79.98 160.92 14 43.98 51.9 49.14 88.92 98.04 47.88 149.16 40.02 26.98 26.8 76.92 40.2 49.38 40.02

Vpz 1065 1560 915 1560 1520 170 390 1180 695 1175 1175 785 495 280 160 680 2190 1865 770 1505 385 235 540 495 330 775 420 955 515

Vpzm 394 577 339 577 559 171 173 1181 653 410 408 236 261 261 58 247 626 689 372 557 142 198 198 177 121 343 155 192 190

Zp 0.12 0.08 0.05 0.03 1.05 0.25 0.48 0.50 0.50 1.39 1.39 0.21 0.31 0.62 0.24 0.18 0.08 0.07 0.24 0.18 0.34 0.75 0.20 0.15 0.22 0.22 0.26 0.26 0.21

Zone 1-310 1-311 1-401 1-402 1-403 1-404 1-405 1-406 1-407 1-408 1-409 1-410 1-411Zone Type ClassroomsOffice spacClassroomsOffice spacOffice spacOffice spacCorridors Corridors Office spacCorridors ClassroomsOffice spacOffice space

Az125 283 243 417 283 280 798 1190 420 814 125 417 283

Pz 6 2 12 3 2 2 0 0 3 0 6 3 2Rp 10 5 10 5 5 5 0 0 5 0 10 5 5Ra 0.12 0.06 0.12 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.12 0.06 0.06Pz*Rp 60 10 120 15 10 10 0 0 15 0 60 15 10

Az*Ra 15 16.98 29.16 25.02 16.98 16.8 47.88 71.4 25.2 48.84 15 25.02 16.98Ez 1 1 1 1 1 1 1 1 1 1 1 1 1

Voz 75 26.98 149.16 40.02 26.98 26.8 47.88 71.4 40.2 48.84 75 40.02 26.98Vpz 180 545 245 395 445 525 380 450 415 925 190 520 535Vpzm 147 200 197 219 160 120 140 197 154 217 148 192 197Zp 0.51 0.13 0.76 0.18 0.17 0.22 0.34 0.36 0.26 0.23 0.51 0.21 0.14

SYSTEM LEVELPs 324D 1.00

Vou 4726

Xs 0.15 Not used in calculation

SYSTEM EFFICIENCYMax Zp 1.39 (> 0.55) --> use Appendix G!

Page 16

APPENDIX B

ZONE LEVEL

AHU-1

Zone 1-101A 1-101B 1-102A 1-102B 1-103 1-104 1-105 1-106 1-107 1-108A 1-108B 1-109 1-110 1-201 1-202 1-203 1-204 1-205 1-206 1-207 1-301 1-302 1-303 1-304 1-305 1-306 1-307 1-308Zone Type Lobbies Lobbies Lobbies Lobbies Classroom Storage rooWood/metaClassroom Classroom Classroom Classroom Corridors Corridors Classroom Office spacOffice spacCorridors Lobbies Corridors Office spacLobbies Classroom Office spacOffice spacOffice space Corridors Office space LobbiesAz 307 308 307 308 882 360 350 883 729 735 735 842 1333 341 150 483 865 819 1482 884 798 243 417 283 280 1282 420 823Pz 6 6 0 0

48 2 2 48 24 48 48 0 0 12 1 3 0 0 0 9 0 12 3 2 2 1 3 0Rp 5 5 5 5 10 0 10 10 10 10 10 0 0 10 5 5 0 5 0 5 5 10 5 5 5 0 5 5Ra 0.06 0.06 0.06 0.06 0.12 0.12 0.18 0.12 0.12 0.12 0.12 0.06 0.06 0.12 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.12 0.06 0.06 0.06 0.06 0.06 0.06Pz*Rp 30 30 0 0 480 0 20 480 240 480 480 0 0 120 5 15 0 0 0 45 0 120 15 10 10 0 15 0Az*Ra 18.42 18.48 18.42 18.48 105.84 43.2 63 105.96 87.48 88.2 88.2 50.52 79.98 40.92 9 28.98 51.9 49.14 88.92 53.04 47.88 29.16 25.02 16.98 16.8 76.92 25.2 49.38

Voz 48.42 48.48 18.42 18.48 585.84 43.2 83 585.96 327.48 568.2 568.2 50.52 79.98 160.92 14 43.98 51.9 49.14 88.92 98.04 47.88 149.16 40.02 26.98 26.8 76.92 40.2 49.38

Vpz 1065 1560 915 1560 1520 170 390 1180 695 1175 1175 785 495 280 160 680 2190 1865 770 1505 385 235 540 495 330 775 420 955

Vdz 1065 1560 915 1560 1520 170 390 1180 695 1175 1175 785 495 280 160 680 2190 1865 770 1505 385 235 540 495 477 775 556 955

Vdzm 394 577 339 577 559 171 173 1181 653 410 408 236 261 261 58 247 626 689 372 557 142 198 198 177 268 343 291 192

Zd 0.12 0.08 0.05 0.03 1.05 0.25 0.48 0.50 0.50 1.39 1.39 0.21 0.31 0.62 0.24 0.18 0.08 0.07 0.24 0.18 0.34 0.75 0.20 0.15 0.10 0.22 0.14 0.26

Ep 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.69 1.00 0.76 1.00

Er 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Ez 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Fa 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.69 1.00 0.76 1.00

Fb 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.69 1.00 0.76 1.00

Fc 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

SYSTEM LEVELPs 324

D 1.00

Vou 4726Vps 30535

Xs 0.15

SYSTEM EFFICIENCYEvz 1.03 1.07 1.10 1.12Ev 1.03

Percent outdoor air intakeVot 4580 15% = Vot/Vps

Page 17

APPENDIX B (cont.)

Note: In VAV systems, Vps is equal to the fan airflow, and the formula in cell c40 needs to be replaced by this value.

AHU-1 Appendix G

ZONE LEVEL

Zone 1-309 1-310 1-311 1-401 1-402 1-403 1-404 1-405 1-406 1-407 1-408 1-409 1-410 1-411Zone Type Office space Classrooms (aOffice space Classrooms (aOffice space Office space Office space Corridors Corridors Office space Corridors Classrooms (aOffice space Office spaceAz 417 125 283 243 417 283 280 798 1190 420 814 125 417 283Pz

3 6 2 12 3 2 2 0 0 3 0 6 3 2Rp 5 10 5 10 5 5 5 0 0 5 0 10 5 5Ra 0.06 0.12 0.06 0.12 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.12 0.06 0.06Pz*Rp 15 60 10 120 15 10 10 0 0 15 0 60 15 10Az*Ra 25.02 15 16.98 29.16 25.02 16.98 16.8 47.88 71.4 25.2 48.84 15 25.02 16.98

Voz 40.02 75 26.98 149.16 40.02 26.98 26.8 47.88 71.4 40.2 48.84 75 40.02 26.98

Vpz 515 180 545 245 395 445 525 380 450 415 925 190 520 535

Vdz 515 180 545 245 395 445 671 380 450 415 925 190 520 535

Vdzm 190 147 200 197 219 160 266 140 197 154 217 148 192 197

Zd 0.21 0.51 0.13 0.76 0.18 0.17 0.10 0.34 0.36 0.26 0.23 0.51 0.21 0.14

Ep 1.00 1.00 1.00 1.00 1.00 1.00 0.78 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Er 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Ez 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Fa 1.00 1.00 1.00 1.00 1.00 1.00 0.78 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Fb 1.00 1.00 1.00 1.00 1.00 1.00 0.78 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Fc 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Page 18

APPENDIX B (cont.)

AHU-1 Appendix G (cont.)

Zone 2-201 2-202 2-203 2-204 2-301 2-302 2-303 2-304 2-305 2-401 2-402 2-403A 2-403B 2-404Zone Type ClassroomStorage roClassroomClassroomClassroomStorage roClassroomClassroomClassroomScience la Storage roClassroomClassroomOffice spacAz 1162 265 1162 881 1161 262 442 1162 400 360 520 580 580 266Pz 24 0 24 24 24 0 4 24 0 1 0 12 12 2Rp 10 0 10 10 10 0 10 10 10 10 0 10 10 5Ra 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.18 0.12 0.12 0.12 0.06Pz*Rp 240 0 240 240 240 0 40 240 0 10 0 120 120 10Az*Ra 139.44 31.8 139.44 105.72 139.32 31.44 53.04 139.44 48 64.8 62.4 69.6 69.6 15.96Ez 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Voz 379 32 379 346 379.32 31.44 93.04 379.44 48 74.8 62.4 189.6 189.6 25.96

Vpz 1610 460 1980 1700 1570 535 1840 500 1185 780 680 2880 2880 870

Vpzm 865 300 825 605 1530 295 1540 250 530 680 685 530 530 300

Zp 0.44 0.11 0.46 0.57 0.25 0.11 0.06 1.52 0.09 0.11 0.09 0.36 0.36 0.09

SYSTEM LEVELPs 151

D 1.00

Vou 2610



Page 19

ZONE LEVEL

AHU-2

APPENDIX C

2-201 2-202 2-203 2-204 2-301 2-302 2-303 2-304 2-305 2-401 2-402 2-403A 2-403B 2-404Classroom Storage ro Classroom Classroom Classroom Storage ro Classroom Classroom Classroom Science labStorage ro Classroom Classroom Office spac

Az 1162 265 1162 881 1161 262 442 1162 400 360 520 580 580 266Pz 24 0 24 24

24 0 4 24 0 1 0 12 12 2Rp 10 0 10 10 10 0 10 10 10 10 0 10 10 5Ra 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.18 0.12 0.12 0.12 0.06Pz*Rp 240 0 240 240 240 0 40 240 0 10 0 120 120 10Az*Ra 139.44 31.8 139.44 105.72 139.32 31.44 53.04 139.44 48 64.8 62.4 69.6 69.6 15.96

Voz 379.44 31.8 379.44 345.72 379.32 31.44 93.04 379.44 48 74.8 62.4 189.6 189.6 25.96

Vpz 1610 460 1980 1700 1570 535 1840 500 1185 780 680 2880 2880 870

Vdz 1610 560 1980 1835 1570 635 1840 600 1320 880 780 2880 2880 970

Vdzm 865 400 825 740 1530 395 1540 350 665 780 785 530 530 400

Zd 0.44 0.08 0.46 0.47 0.25 0.08 0.06 1.08 0.07 0.10 0.08 0.36 0.36 0.06

Ep 1.00 0.82 1.00 0.93 1.00 0.84 1.00 0.83 0.90 0.89 0.87 1.00 1.00 0.90

Er 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Ez 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Fa 1.00 0.82 1.00 0.93 1.00 0.84 1.00 0.83 0.90 0.89 0.87 1.00 1.00 0.90

Fb 1.00 0.82 1.00 0.93 1.00 0.84 1.00 0.83 0.90 0.89 0.87 1.00 1.00 0.90

Fc 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

SYSTEM LEVELPs 151

D 1.00

Vou 2610Vps 19470

Xs 0.13

SYSTEM EFFICIENCYEvz 0.70 1.04 0.67 0.63 0.89 1.04 1.07 -0.17 1.05 1.03 1.04 0.78 0.78 1.06Ev -0.17

Percent outdoor air intakeVot -15640 -80% = Vot/Vps

Page 20


AHU-2 Appendix G

ZONE LEVEL

APPENDIX C (cont.)

Zone 3-101 3-102 3-103 3-104 3-201 3-202 3-203 3-204 3-205 3-206 3-207 3-301 3-302 3-303 3-304 3-305 3-306 3-307 3-308 3-401 3-402 3-403 3-404 3-405 3-406Zone Type ClassroomsStorage rooClassroomsClassroomsClassroomsStorage rooClassroomsClassroomsClassroomsScience labStorage rooClassroomsClassroomsOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice spaceAz 1160 266 1060 880 266 266 266 266 1218 266 1160 1160 321 282 266 532 1160 519 774 266 875 908 266 532 1150Pz 24 0 24 48 2 2 2 2 48 0 48 48 2 2 2 0 24 16 24 2 43 24 2 24 24Rp 10 0 10 10 10 0 10 10 10 10 0 10 10 5 5 5 5 5 5 5 5 5 5 5 5Ra 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.18 0.12 0.12 0.12 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06Pz*Rp 240 0 240 480 20 0 20 20 480 0 0 480 20 10 10 0 120 80 120 10 215 120 10 120 120Az*Ra 139.2 31.92 127.2 105.6 31.92 31.92 31.92 31.92 146.16 47.88 139.2 139.2 38.52 16.92 15.96 31.92 69.6 31.14 46.44 15.96 52.5 54.48 15.96 31.92 69Ez 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Voz 379 32 367 586 51.92 31.92 51.92 51.92 626.16 47.88 139.2 619.2 58.52 26.92 25.96 31.92 189.6 111.14 166.44 25.96 267.5 174.48 25.96 151.92 189

Vpz 1210 435 1645 1320 735 490 490 490 1845 435 1815 1780 615 600 600 1530 1960 985 1480 1855 735 2075 600 1390 2315

Vpzm 910 140 770 1522 300 300 300 300 890 140 1535 1540 380 325 300 630 1520 320 480 1105 230 1130 300 640 1465

Zp 0.42 0.23 0.48 0.38 0.17 0.11 0.17 0.17 0.70 0.34 0.09 0.40 0.15 0.08 0.09 0.05 0.12 0.35 0.35 0.02 1.16 0.15 0.09 0.24 0.13

SYSTEM LEVELPs 252

D 0.58

Vou 3187



Page 21

ZONE LEVEL

AHU-3

APPENDIX D

3-101 3-102 3-103 3-104 3-201 3-202 3-203 3-204 3-205 3-206 3-207 3-301 3-302 3-303 3-304 3-305 3-306 3-307 3-308 3-401 3-402 3-403 3-404 3-405 3-406ClassroomsStorage rooClassroomsClassroomsClassroomsStorage rooClassroomsClassroomsClassroomsScience labStorage rooClassroomsClassroomsOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice spacOffice space

Az 1160 266 1060 880 266 266 266 266 1218 266 1160 1160 321 282 266 532 1160 519 774 266 875 908 266 532 1150Pz 24 0 24 48

2 2 2 2 48 0 48 48 2 2 2 0 24 16 24 2 43 24 2 24 24Rp 10 0 10 10 10 0 10 10 10 10 0 10 10 5 5 5 5 5 5 5 5 5 5 5 5Ra 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.18 0.12 0.12 0.12 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06Pz*Rp 240 0 240 480 20 0 20 20 480 0 0 480 20 10 10 0 120 80 120 10 215 120 10 120 120Az*Ra 139.2 31.92 127.2 105.6 31.92 31.92 31.92 31.92 146.16 47.88 139.2 139.2 38.52 16.92 15.96 31.92 69.6 31.14 46.44 15.96 52.5 54.48 15.96 31.92 69

Voz 379.2 31.92 367.2 585.6 51.92 31.92 51.92 51.92 626.16 47.88 139.2 619.2 58.52 26.92 25.96 31.92 189.6 111.14 166.44 25.96 267.5 174.48 25.96 151.92 189

Vpz 1210 435 1645 1320 735 490 490 490 1845 435 1815 1780 615 600 600 1530 1960 985 1480 1855 735 2075 600 1390 2315

Vdz 1345 535 1645 1320 835 590 590 590 1845 535 1815 1780 715 600 700 1530 1960 985 1480 1855 835 2075 700 1390 2315

Vdzm 1045 240 770 1522 400 400 400 400 890 240 1535 1540 480 325 400 630 1520 320 480 1105 330 1130 400 640 1465

Zd 0.36 0.13 0.48 0.38 0.13 0.08 0.13 0.13 0.70 0.20 0.09 0.40 0.12 0.08 0.06 0.05 0.12 0.35 0.35 0.02 0.81 0.15 0.06 0.24 0.13

Ep 0.90 0.81 1.00 1.00 0.88 0.83 0.83 0.83 1.00 0.81 1.00 1.00 0.86 1.00 0.86 1.00 1.00 1.00 1.00 1.00 0.88 1.00 0.86 1.00 1.00

Er 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Ez 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Fa 0.90 0.81 1.00 1.00 0.88 0.83 0.83 0.83 1.00 0.81 1.00 1.00 0.86 1.00 0.86 1.00 1.00 1.00 1.00 1.00 0.88 1.00 0.86 1.00 1.00

Fb 0.90 0.81 1.00 1.00 0.88 0.83 0.83 0.83 1.00 0.81 1.00 1.00 0.86 1.00 0.86 1.00 1.00 1.00 1.00 1.00 0.88 1.00 0.86 1.00 1.00

Fc 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

SYSTEM LEVELPs 252

D 0.58

Vou 3187Vps 29430

Xs 0.11

SYSTEM EFFICIENCYEvz 0.70 0.94 0.63 0.72 0.96 1.01 0.95 0.95 0.40 0.86 1.02 0.71 0.97 1.03Ev 0.40

Percent outdoor air intakeVot 7874 27% = Vot/Vps

Page 22


AHU-3 Appendix G

ZONE LEVEL

APPENDIX D (cont.)

ZoneZone Type Science labScience laboratoriesAz 580 580Pz 12 12Rp 10 10Ra 0.18 0.18Pz*Rp 120 120Az*Ra 104.4 104.4Ez 1 2

Voz 224 112

Vpz 4850 4850

Vpzm 605 605

Zp 0.37 0.19

SYSTEM LEVELPs 24

D 1.00

Vou 449


SYSTEM EFFICIENCYMax Zp 0.37Ev 0.70

Percent outdoor air intakeVot 641 7% = Vot/Sum of Vpz

Page 23

ZONE LEVEL

AHU-4

APPENDIX E


Page 24

8.0 REFERENCES . ASHRAE Standard 62-2001, Ventilation for Acceptable Indoor Air Quality. ASHRAE Standard 62-2001. Addendum n, Ventilation for Acceptable Indoor Air

Quality. 2003. Clark Nexsen: Construction Drawings, Schedules, and Specifications for Longwood

University’s New Science Building.

Documents

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