Residential Ventilation & IAQ Requirements for Existing Homes: Second Discussion Proposed Specification Outline Regional Technical Forum November 9 th,

Residential Ventilation & IAQ Requirements for Existing Homes:

Second Discussion

Proposed Specification Outline

Regional Technical ForumNovember 9th, 2009

Proposed IAQ Specification Summary; actual spec language to be developed after adoption of basic idea

(Items in red to be added to the specs in 3 years, items in blue need an RTF decision)

1. The RTF IAQ standard must be met where any of the following measures take place:a) Air-sealingb) Duct sealingc) Window replacementd) Wall insulatione) Attic Insulationf) Floor Insulation

2. Homeowner shall be given information on indoor air quality and their ventilation system.

3. House is not eligible to receive the measures identified in Section 1 if either of the following are true:a) An unvented combustion appliance is located inside the house; orb) There are obvious signs of moisture problems (mold).

4. A CO alarm that is listed with the Canadian Standards Association is required in homes where a combustion appliance is present.

5. Where duct systems are located outside heated space, ducts shall be PTCS certified.

6. Blower door shall be used to determine both pre- and post- whole house leakage levels.

7. A whole-house mechanical ventilation system that meets the calculator shall be installed. Options on the calculator’s underlying ventilation rate:

a) Follow 62.2; or b) Whole-house ventilation not required, unless blower door test results in 0.40 ACHn or less, then 62.2.

8. Ten percent (10%) of all homes that receive the measures in Section 1 must receive an on-site 3rd-party inspection to verify all IAQ requirements are met.

2

We are not Crazy

• Design Goals:– To achieve more energy savings per home and

minimize negative IAQ impacts.– Eliminate the “stick a fan in it” as the lowest cost

solution

• Acknowledgements: – This is not the perfect solution. The perfect

solution is a ERV or HRV with a distributed supply and return system. Its perfect, but too expensive $3,000 to $4,000

– This will require time and money to implement.

3

Discussion of Each Proposed Spec

Discussion• Air-sealing and duct sealing directly reduce natural air-infiltration

– Contractors are already familiar with following an IAQ standard and using testing equipment– Contractors would need training on the revised specification

• All weatherization measures can (and should) reduce natural air-infiltration.– It will take time (3 years?) to set up the training (blower door testing, etc.) and quality assurance

processes for the measures in red.– Without testing, there’s no way to tell how how much the measure changed the natural infiltration

rates of these homes. It could be a lot, or not.

4

Proposed Spec

1. The RTF IAQ standard must be met where any of the following measures take place:a) Air-sealingb) Duct sealingc) Window replacementd) Wall insulatione) Attic Insulationf) Floor Insulation


Discussion• This complies with:

– ASHRAE 62.2, – BPA Record of Decisions, and – common sense.

5

Proposed Spec

2. Homeowner shall be given information on indoor air quality and their ventilation system.


Discussion• ASHRAE 62.2 does not fix these issues; they need to be dealt

with separately.

6

Proposed Spec3. House is not eligible to receive the measures identified in Section 1 if either of the following

are true:a) An unvented combustion appliance is located inside the house; orb) There are obvious signs of moisture problems (mold).


Discussion• Carbon monoxide poisoning is one of the most likely causes of

(quick) death related to IAQ.• ASHRAE 62.2 may soon require a CO alarm on all houses.

7

Proposed Spec4. A CO alarm that is listed with the Canadian Standards Association is required in homes where

a combustion appliance is present.


Discussion• Leaky duct systems can cause “dirty” air from the garage,

attic, or crawlspace to be brought into the house.• ASHRAE 62.2 currently requires tight ducts when ducts are

located in the garage.– A proposed spec may change this to be required anytime ducts are

outside.

8

Proposed Spec5. Where duct systems are located outside heated space, ducts shall be PTCS certified.


Discussion• More Energy Savings:

– This spec allows and encourages energy savings credit to be taken for infiltration reductions for all measures.

– Post-blower door test is required in order to take ASHRAE 62.2’s infiltration credit• Without a blower door test, ASHRAE 62.2 ventilation rates can be quite

high (for tight houses), wasting energy with unnecessary ventilation.

9

Proposed Spec6. Blower door shall be used to determine both pre- and post- whole house leakage levels.


Discussion• RTF needs to make a decision on this.

– Following 62.2 would mean:• A fan is required in most cases

– More Cost, More Training– More Air-Sealing (= more measures and more savings?)

» Air-sealing crews can seal houses tighter; » Air-sealing crews may be brought in more often on other measures

• RTF can stand behind ASHRAE’s national standard

– Having a 0.40 ACHn threshold would mean:• A fan can be avoided

– Less Cost (= more measures?)

– Less Ventilation (= more savings?)

• Less Air-Sealing• RTF would need to justify its own standard

10

Proposed Spec7. A whole-house mechanical ventilation system that meets the calculator shall be installed.

Options on the calculator’s underlying ventilation rate: a) Follow 62.2; or b) Whole-house ventilation not required, unless blower door test results in 0.40 ACHn or less, then

62.2.


Discussion• New specifications are adhered to better with good follow-

up/oversight. – Especially specs that require the use of testing equipment.

11

Proposed Spec8. Ten percent (10%) of all homes that receive the measures in Section 1 must receive an on-

site 3rd-party inspection to verify all IAQ requirements are met.

A Look at Savings and Cost-Effectiveness• Method & Assumptions: SEEM modeling, Portland, 1800 ft2, 1-story, crawlspace, last-

measure-in• Caveats:

– Ventilation fan energy not taken into account– Analysis assumes a linear relationship between infiltration energy use and outdoor temperature

• Increased stack effect (i.e. increased infiltration and energy) at low outdoor temps not taken into account

– This analysis is a simplified version of RTF savings calculations and is intended to compare costs and cost-effectiveness of various measures, it is NOT INTENDED TO REPRESENT SAVINGS NOR B/C RATIOS FOR THE DESCRIBED MEASURES.

12

FAF HP Zonal FAF HP Zonal FAF HP ZonalInsulate Attic (0 to 38) 1800 3882 1826 3368 2.2 1.0 1.9 $0.84 $1,511 3.2 1.5 2.8Insulate Floor (0 to 30) 1800 2837 1280 2579 1.6 0.7 1.4 $1.37 $2,464 1.4 0.7 1.3Insulate Walls (0 to 11) 1447 1958 924 1686 1.4 0.6 1.2 $0.97 $1,409 1.7 0.8 1.5Window Replacement (0.85 to 0.30) 270 3245 1580 2786 12.0 5.9 10.3 $20.61 $5,564 0.7 0.4 0.6Duct Sealing n/a 924 688 n/a 2.2 1.7 n/aAir-Seal from 0.60 to 0.40 1800 & 0.2 ACHn 1781 837 1537 0.49 0.23 0.43 $0.16 $576 3.9 1.8 3.3Air-Seal from 0.40 to 0.30 1800 & 0.1 ACHn 871 413 751 0.48 0.23 0.42 $0.16 $288 3.8 1.8 3.3

Cost

$518

B/CSavings (kWh/yr)

Savings (kWh/yr/sqft/0.1ACHn)

Savings (kWh/yr/sqft)Measure Units

SqFt (& ACHn)Cost/Unit

Results – Standalone Measures

A Look at Savings and Cost-Effectiveness (continued)

13

Results – Install Measure in Conjunction with Air Sealing (0.60 ACHn to 0.40 ACHn)

Results – Install Measure in Conjunction with Air Sealing , but don’t stop at 0.40 (0.60 to 0.30 ACHn)

Results – Install Measure, Air Seal, with Ventilation System Cost

FAF HP Zonal FAF HP ZonalInsulate Attic (0 to 38) 1800 5663 2663 4905 $2,087 3.4 1.6 2.9Insulate Floor (0 to 30) 1800 4618 2117 4116 $3,040 1.9 0.9 1.7Insulate Walls (0 to 11) 1447 3739 1760 3224 $1,985 2.4 1.1 2.0Window Replacement (0.85 to 0.30) 270 5026 2416 4324 $6,140 1.0 0.5 0.9Duct Sealing n/a 2705 1524 n/a $576 5.9 3.3 n/a

Measure + Air Seal (0.6 to 0.4) UnitsSqFt (& ACHn)

Savings (kWh/yr)Cost

B/C

FAF HP Zonal FAF HP ZonalInsulate Attic (0 to 38) 1800 6534 3076 5656 $2,375 3.4 1.6 3.0Insulate Floor (0 to 30) 1800 5488 2530 4867 $3,328 2.1 1.0 1.8Insulate Walls (0 to 11) 1447 4609 2174 3975 $2,273 2.5 1.2 2.2Window Replacement (0.85 to 0.30) 270 5897 2830 5075 $6,428 1.2 0.6 1.0Duct Sealing n/a 3576 1938 n/a $864 5.2 2.8 n/a

Measure + Air Seal (0.6 to 0.3) UnitsSqFt (& ACHn)


B/C

FAF HP Zonal FAF HP ZonalInsulate Attic (0 to 38) 1800 6534 3076 5656 $2,875 2.8 1.3 2.5Insulate Floor (0 to 30) 1800 5488 2530 4867 $3,828 1.8 0.8 1.6Insulate Walls (0 to 11) 1447 4609 2174 3975 $2,773 2.1 1.0 1.8Window Replacement (0.85 to 0.30) 270 5897 2830 5075 $6,928 1.1 0.5 0.9Duct Sealing n/a 3576 1938 n/a $1,364 3.3 1.8 n/a

Measure + Air Seal (0.6 to 0.3)(& add $500 for ventilation system)

UnitsSqFt (& ACHn)


B/C

14

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

Attic Floors Walls Windows Duct Seal

Ener

gy S

avin

gs (k

Wh/

year

)

Measure

Energy Savings (FAF)

Standalone Measure

Add Air Seal (0.6 to 0.4)


0

1

2

3

4

5

6

7

Attic Floors Walls Windows Duct Seal

Bene

fit/C

ost

Measure

RelativeB/C Ratios (FAF)

Standalone Measure



Add Air Seal (0.6 to 0.3) & $500

A (graphical) Look at Savings and Cost-Effectiveness (continued)

Estimated Start-up Costs

15

Assumptions# of contractors 200Cost for TestingEquipment $2,500Required Trainings 50Cost Per Training $2,500

CostsTraining Costs $125,000Utility Meetings $50,000Training Materials $50,000Equipment Costs $500,000QA /Year $680,000TOTAL $1,405,000

What We Need from the RTF• Ultimately– An RTF decision on an IAQ standard

• Today– Discussion– Guidance for the Subcommittee• Proposed Specification:

– Overall is it on the right track?– Leanings regarding specification #7? A vote?

• What else could the subcommittee do to help with a decision?

16

END

17

Slides from Oct 13th, 2009 RTF Meeting

18

History - BPA1981– Residential Weatherization Program allows

air tightening measures if home:• is site built• has ventilated crawlspace• Does not have wood stove, foam insulation

(formaldehyde), nor unvented combustion appliances

– IAQ brochures given to homeowners– Concerns: Radon, combustion byproducts,

formaldehyde

1989– “New Energy-Efficient Homes Program” RECORD

OF DECISION requires:• Exhaust fans in kitchens and baths• Whole House mechanical ventilation• Designated air supplies for combustion appliances• IAQ information given to homeowner• Building materials that meet HUD standards for

formaldehyde emissions• Attention to radon and mitigation as necessary

– Concerns: Radon and other indoor pollutants

Today– Site Built• Some air sealing measures

require whole house ventilation

• Other Wx measures don’t– Manufactured Homes• All measures require whole

house ventilation– New Homes all require whole

house ventilation

1980 1985 2010200520001990 1995

1984– “Expanded Residential Weatherization Program” RECORD

OF DECISION allows house tightening measures (storm windows, wall insulation, weatherstripping, door treatments, etc.) if:• Homeowner receives information on IAQ and how to reduce

pollutants• Radon monitoring is provided to homeowners• Homes with tested high radon levels receive subsidy for

mitigation– Concerns: Primarily Radon

1993– “Resource Programs” RECORD OF DECISION says:• Radon no longer an issue for either new home

efficiency programs nor existing home weatherization programs

• Otherwise, 1984 and 1989 ROD’s should be followed• Also, manufactured homes may be allowed, if they

follow the new homes ROD (1989).– They’re subject to more stringent requirements

because insulating manufactured homes is believed to decrease natural infiltration more than insulating site built homes

19

Current RTF IAQ Requirements SummarySite Built Manufactured Homes

Insulation and Windows MeasuresVery Limited Ventilation

Requirements. (exhaust fan ducts cannot terminate in atti c or crawlspace)

Whole House Ventilation System Required and special requirements for combustion

appliances.

Air SealingWhole House Ventilation

System Required IF ACHn<0.45Whole House Ventilation

System Required.

PTCS Duct SealingNo Ventilation Requirements;

CO alarm required where combustion appliance inside.

No Ventilation Requirements; CO alarm required where

combustion appliance inside.Heat Pump Conversions No Requirements. No Requirements.

Multifamily New ConstructionWhole House Ventilation

System Required; Combustion Appliance Requirements.

N/A

Montana House

Whole House Ventilation System Required; CAZ test or CO alarm requred where atm

vented combustion appliance is inside heated space.

N/A

Energy Star Homes

Spot Ventilation Required (Whole house required in OR); CAZ test required where atm

vented combustion appliance is inside heated space.

Whole House Ventilation System Required.

New

Con

stru

ction

Existi

ng H

omes

Measure

20

What Is 62.2? (From ASHRAE’s Website)ANSI/ASHRAE 62.2-2007 – Published standard. (Supersedes ANSI/ASHRAE 62.2-2004.)Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings1. PURPOSE: This standard defines the roles of and minimum requirements for mechanical and natural

ventilation systems and the building envelope intended to provide acceptable indoor air quality in low-rise residential buildings.

2. SCOPE: This standard applies to spaces intended for human occupancy within single-family houses and multifamily structures of three stories or fewer above grade, including manufactured and modular houses. This standard does not apply to transient housing such as hotels, motels, nursing homes, dormitories, or jails.2.1 This standard considers chemical, physical, and biological contaminants that can affect air quality. Thermal comfort requirements are not included in this standard (see ANSI/ASHRAE Standard 55-2004, Thermal Environmental Conditions for Human Occupancy).2.2 While acceptable indoor air quality is the goal of this standard, it will not necessarily be achieved even if all requirements are met:a) because of the diversity of sources and contaminants in indoor air and the range of susceptibility in the population; b) because of the many other factors that may affect occupant perception and acceptance of indoor air quality, such as air temperature, humidity, noise, lighting, and psychological stress; c) if the ambient air is unacceptable and this air is brought into the building without first being cleaned (cleaning of ambient outdoor air is not required by this standard.); d) if the system(s) are not operated and maintained as designed, or e) when high-polluting events occur.

2.3 This standard does not address unvented combustion space heaters.

21

ASHRAE 62.2 – Basic Components• Whole Building Mechanical Ventilation System

– Required CFM = 0.01 x Floor Area + 7.5 x [(Number of Bedrooms)+1]Note: adjustments are made for high occupant density and intermittent operation

• Local Mechanical Exhaust– Kitchens = 100 cfm– Bathrooms = 50 cfm(Note: Continuous operation also allowed at different rates)

• Other Requirements– Prescriptively seal house between attic, crawl, garage– Provide ventilation system instructions to homeowner– Combustion appliances

• receive adequate combustion air • where atmospherically vented appliances are inside occupiable space, additional requirements if two

largest exhaust fans have flow rate > 15cfm/100 square feet of floor area. – Total duct leakage must be < 6% of total fan flow at 25 Pa if ducts are located in the garage.

• PROPOSED SPEC: Required anywhere ducts are located outside the pressure boundary.– Rooms must have ventilation openings (i.e. openable window area) of 4% of floor area or

greater. (exceptions)– Filtration requirements for systems that use ducts– PROPOSED SPEC: CO alarm required (Out for public comment until Oct 26 th)

• Equipment Requirements– Tested and rated for flow and sound according to HVI– Sound ratings: Continuous fans < 1 sone; Intermitent Fans < 3 sones– Use tested airflow; or use airflow rating at 0.25 in H20 with proper duct design

22

ASHRAE 62.2 – Existing Home Exceptions

• Inadequate Existing Bath/Kitchen Fans– An increase in whole-house ventilation rates can be used to

overcome a deficiency in existing bath/kitchen fan flow rates.

• Infiltration Credit– Existing homes with an effective infiltration rate greater than

2cfm/100ft2 may use a portion of this “excess” infiltration to reduce the required whole house ventilation rate. Effective Infiltration is estimated based on:• House tightness (blower door test)• Climate• Building height

23

Leakage Area (ASTM 779, w/caveats 4 and 5) 0.80 sq. ft.Normalized Leakage (ASHRAE Std 119) 0.44Effective AirChange Rate from Infiltration (ASHRAE Std 136) 0.38 ACH

Inputs Effective Infiltration Flow Rate 113 cfmHouse Floor Area 2,000 sq.ft. ASHRAE 62.2 Default Infiltration Credit 40 cfmHouse Volume 18,000 cubic feet Excess Infiltration 73 cfmVertical Distance from lowest grade level to highest ceiling 11 feet Section 4.1 Whole House Ventilation Rate 50 cfmNumber of Bedrooms 3 bedrooms Section 4.1.1 Different Occupant Density 0 cfmNumber of Bathrooms 2 bathrooms Section 4.1.3 Infiltration Credit -36 cfmNumber of Occupants 3 people Section C3.3 Required Additional Airflow 25 cfmBlower Door Test Performed? 1 Mechanical Ventilation Air Requirement 39 cfmBlower Door Tested CFM at 50Pa depressurization 2100 CFM50 Fractional On-Time 1.00City Cycle Time 24Whole House Fan on-time per cycle 24 hours Fractional On-Time rounded down 1.00Whole House Fan off-time per cycle 0 hours Ventilation Effectiveness 1.00Kitchen Exhaust Fan's Measured Airflow Rate 50 cfm Initial Room Airflow Deficit: Kitchen 50 cfmBathroom 1: Exhaust Fan's Measured Airflow Rate 25 cfm Initial Room Airflow Deficit: Bathroom 1 25 cfmBathroom 2: Exhaust Fan's Measured Airflow Rate 25 cfm Initial Room Airflow Deficit: Bathroom 2 25 cfm

2525252525

ASHRAE 62.2 Whole House Ventilation Requirements Calculator

Results Intermediate Outputs

Required Whole-House Fan Measured Flow Rate => 39 cfm

Purpose: This calculator is intended to determine the required whole house ventilation fan flow rate for existing homes, according to ASHRAE Standard 62.2.

Instructions: A. Enter the necessary data into the green "Inputs" section of the calculator (Cells C15 through C33)B. Fix any inputs causing errors, as necessary. (cells B5:H8)C. The resulting required whole house flow rate, in cfm, is given in cell C11:12.

OR - Astoria

Yes

24

ASHRAE 62.2 – Example Home #125

Note: Current RTF standard for manufactured homes is always required and independent of ACHn.

0

50

100

150

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Who

le H

ouse

Ven

tila

tion

Rat

e (c

fm)

"Natural Air Exchange Rate" (ACHn = ACH50/20)

ASHRAE 62.2 Continuous Whole-House Ventilation Requirement

(2 bed/1 bath, 1-story, 1100 ft2, Portland)

0cfm/0cfm

25cfm/50cfm

50cfm/100cfm

_

Current RTF Standard

Measured Bath/Kitchen Fan

Flow Rate


0

50

100

150

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Who

le H

ouse

Ven

tila

tion

Rat

e (c

fm)




0cfm/0cfm

25cfm/50cfm

50cfm/100cfm

_



Flow Rate



0

50

100

150

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Who

le H

ouse

Ven

tila

tion

Rat

e (c

fm)




0cfm/0cfm

25cfm/50cfm

50cfm/100cfm

_



Flow Rate



0

50

100

150

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Who

le H

ouse

Ven

tila

tion

Rat

e (c

fm)




0cfm/0cfm

25cfm/50cfm

50cfm/100cfm

_



Flow Rate


Which Efficiency Measures Should Apply?The subcommittee tentatively has agreed that everything except heat pumps should receive

some kind of IAQ attention.

29

Mechanical Ventilation Required?

Attention to CO?

Air Sealing Yes Directly reduces infiltration in the building shell If ACHn < 0.45 No

Duct Sealing Yes Directly reduces infiltration of the HVAC system No Yes

Wall Insulation Very LikelyInsert-tube method is required. Dense-pack is

allowed (and encouraged).No

(Yes for MH)No

Window Replacement Very Likely Caulking, etc. to reduce infiltration No(Yes for MH)

No

Attic Insulation Likely Specifications require prescriptive air-sealing No(Yes for MH)

No

Floor Insulation Likely Specifications require prescriptive air-sealing No(Yes for MH)

No

Heat Pump Conversion PossibleAddition of ducts a) influences (likely to increase) infiltration rate and b) could cause backdrafting.

No No

Heat Pump Upgrade No Unit was going to be replaced anyway No No

Current RTF Requirements

Comments

Negative effect on

IAQ?Measure

What do Others Require?

• ASHRAE 62.2– Wisconsin– California– Others?

• Older Versions of ASHRAE (62-2001)• At least 0.35 ACH and 15 CFM per person

– Low Income Weatherization Programs– Others?

30

What might it look like to implement ASHRAE 62.2 for Wx Programs?

• Ventilation Rate Calculator• Increased Costs

– Blower Door Test– Exhaust Fan Flow Tests– Whole House Fan & Controller Installation– CO Alarm (?)– Training (LOTS of training)

• Oversight/Verification• Incorporate ASHRAE 62.2 updates

????

31

Leakage Area (ASTM 779, w/caveats 4 and 5) 0.80 sq. ft.Normalized Leakage (ASHRAE Std 119) 0.44Effective AirChange Rate from Infiltration (ASHRAE Std 136) 0.38 ACH

Inputs Effective Infiltration Flow Rate 113 cfmHouse Floor Area 2,000 sq.ft. ASHRAE 62.2 Default Infiltration Credit 40 cfmHouse Volume 18,000 cubic feet Excess Infiltration 73 cfmVertical Distance from lowest grade level to highest ceiling 11 feet Section 4.1 Whole House Ventilation Rate 50 cfmNumber of Bedrooms 3 bedrooms Section 4.1.1 Different Occupant Density 0 cfmNumber of Bathrooms 2 bathrooms Section 4.1.3 Infiltration Credit -36 cfmNumber of Occupants 3 people Section C3.3 Required Additional Airflow 25 cfmBlower Door Test Performed? 1 Mechanical Ventilation Air Requirement 39 cfmBlower Door Tested CFM at 50Pa depressurization 2100 CFM50 Fractional On-Time 1.00City Cycle Time 24Whole House Fan on-time per cycle 24 hours Fractional On-Time rounded down 1.00Whole House Fan off-time per cycle 0 hours Ventilation Effectiveness 1.00Kitchen Exhaust Fan's Measured Airflow Rate 50 cfm Initial Room Airflow Deficit: Kitchen 50 cfmBathroom 1: Exhaust Fan's Measured Airflow Rate 25 cfm Initial Room Airflow Deficit: Bathroom 1 25 cfmBathroom 2: Exhaust Fan's Measured Airflow Rate 25 cfm Initial Room Airflow Deficit: Bathroom 2 25 cfm

2525252525

ASHRAE 62.2 Whole House Ventilation Requirements Calculator

Results Intermediate Outputs

Required Whole-House Fan Measured Flow Rate => 39 cfm

Purpose: This calculator is intended to determine the required whole house ventilation fan flow rate for existing homes, according to ASHRAE Standard 62.2.

Instructions: A. Enter the necessary data into the green "Inputs" section of the calculator (Cells C15 through C33)B. Fix any inputs causing errors, as necessary. (cells B5:H8)C. The resulting required whole house flow rate, in cfm, is given in cell C11:12.

OR - Astoria

Yes

Discussion: RTF’s Role and Issues• Does the RTF have adequate expertise in IAQ? If not, then who?• If we attempt to follow 62.2:

– Can we get “close enough” on some requirements and are there some we can ignore?– For which measures should 62.2 be required? – Should there be differences for single family, multifamily, or manufactured homes?

• It’s one thing to have a spec, but how should IAQ requirements be verified? IAQ doesn’t save energy; will it receive attention?

• Will the added cost/burden put a stop to Wx programs?• What about new construction?

Potential Options: 1. Have subcommittee incorporate 62.2 into measure specifications, also set up

quality assurance plan & requirements;2. Keep specs as they are;3. Pass this IAQ job on to someone else (BPA?, codes?);4. Suggest, but don’t require: Rely on letting the (informed) homeowner make

the decision about what IAQ strategies to employ.

32

Documents

Residential Ventilation & IAQ Requirements for Existing Homes: Second Discussion Proposed Specification Outline Regional Technical Forum November 9 th,