2011FOSTER Understanding Zoning

8/12/2019 2011FOSTER Understanding Zoning

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March 23-25, 2011 Landsdowne, VA

Presented by:

HVAC ZONE

DAMPERS&CONTROLS


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Who is ?New trade name ofPreviously marketed zoning under the trade name of 1964-

99:

First company to market and sell HVAC Zoning.Sold more zoning system than the others.

Always Leading Edge ProductsMaking Zoning AffordableSimplest to Install and Wire

Corporation.

Trol-A-Temp is a registered trademark of Honeywell International. There is no affiliation between Honeywell and Trolex Corporation and Honeywell.

March 23-25, 2011Landsdowne, VA

2004-11 ZONEFIRST


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Has completed the required training to sell, install, checkout, and troubleshoot Zone Damper Control Systems. And areherby awarded this certificate with a honorary degree in

ZONEOLOGYA concentrated program of study on the operation of zone dampers and control systems of forced air heating andcooling systems.This training program is recognized by NATE and is eligible for Re-Certification CEU credits. Please sign your name onthe attendance sheet with your NATE Number and we will forward this to NATE.

Be it known to all the world that


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Zoning is Not New


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OEMs Have Zoning

Promotional Literature from the 1980s


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Man

ualD

ResidentialAirDistribu

tionSystems


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Manual JLoad Calculations

Manual DDuct Design

Manual ZrZone ControlComing Late 2011?


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One ThermostatControls Central

HVAC System


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Downstairs

UpstairsTwo Ton

Two Ton

Some state building codes require zoning on two level homes. North Carolina is on


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Downstairs

UpstairsMaster BR

UpstairsKids/Guest

ZoneDampers

A 3 Zone System

will still cost less

than two separate

units!

3.5 Ton


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Two ZonesFirst Floor and Second Floor

Zone One Zone Two


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Three Zones

Zone One

Zone Two

Zone Three


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Four Zones

Zone One

Zone Two

Zone Three

Zone Four


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Zoning Products

ZoneDampers

Zone

ControlPanels

Parallel Blade DampersSpring Return Retro-Round andIn-Line Round Dampers

Single Stage2 and 3 Zone

Multi-Function4 Zone Expandable

2 Zone AdderSingle Stage and Heat Pump2 and 3 Zone

By-Pass Dampers


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Obstacles?Zone Thermostats

Control Panel

Whats

Preventing

Installers fromputting Zoning

on Every HVACSystem?


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Why Not Zoning?Consumers Want It!

Surveys have shown over 60% of Homeownerswould pay $1,200 for zoning when offered.

According to an NAHB survey, when askedwhat they would be willing to pay if their energycosts could be reduced roughly $1,000 a year, 51percent checked $5,000 to $10,999 and another16 percent said $11,000 or more. Thirty-two

percent said they were willing to pay less than$5,000.

Contractors Do Not Offer It.

Hydronic Heating Systems

Practically every boiler is zone withvalves or circulators.

Commercial Offices are Zoned

In Commercial its called Variable AirVolume (VAV).

Zone Thermostats

Control Panel


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Why Not Zon ing?

All Hydronic andHot WaterSystems

are Zoned

Circulating Pump

Zone Valve


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http://www.bellgossett.com/homeowners/ProductPages/Parts-Comfort-Trol-Zone-Control-Valve.asphttp://www.bellgossett.com/homeowners/ProductPages/Parts-Comfort-Trol-Zone-Control-Valve.asp


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Why Not Zon ing?

Its even in many New CarsIndividual Driver and Passenger Temperature Control


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If you have one of these for each room?Why not one of these?

Why Not Zon ing?


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Zoning $aves Energy

Utilities and others promote this!

Public Service Electric and Gas, a New Jersey Utility


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Zoning $aves Energy

11% Electric Input Savings

33% Fewer Air Conditioner Cycles

1990 Energy Study done on actual home in Minneapolis, MN

NO ComfortNO Savings

SavingsNO Comfort

ComfortNO Savings

ComfortAND Savings


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25% Energy Savingswith

PROPER

Zone Controlusing setback

or

20% Extra Cost ofComfortAll stats at same temperature

Zoning $aves Energy


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More Information www.zonefirst.com/energysavings


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Opportunities?

Residential New Construction100%Can be designed from the start.

Residential Retrofit50%

Access to ductwork. May need modifications.

Hydronic w/Air Conditioning Add-onCreate an equal number of zones for bothheating and cooling.

Same Thermostat for Heat and Cool (RH/RC)

Commercial90%Overhead ducts in False Ceilings.

Retrofit for change from Single Tenant to Multi-Tenant

Zone Thermostats

Control Panel


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Zoning System Design

Every forced airsystem can be zoned!

Zoning can make a good systemgreat!

It can also make a poor systemworse!

Zoning is Not a cure all for a poorlyMarch 23-25, 2011Landsdowne, VA

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Zoning System Design

Every good forced air system can be zoned!

ITS JUST A MATTER OF COST.

HOW MUCH WILL IT COST = HOW MUCH DO YOU WANT TO SPEND!

Is it practical? Retrofit?Yes! Overhead A/c systems.

New constructionYES!

It comes down to imagination and creativity.

You can for different reason

OccupancyLiving, sleeping, recreation

ExposuresNorth, south, east, westLevelseach floor be a zone

Loadskitchen, solar, fireplaces


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Airflow characteristics

Garden Hose

As the water flows out of the hose there is:

A certain volume of water, Gallons Per Minute (GPM) = Air CFM

Water flows out at a certain velocity = Feet Per Minute FPM = Same as air.

Water has a pressure behind it in the system to make it come out = Static Pressure, usually measured

in Pounds per Square Inch = PSI = Air S.P.

A ir is a fluid just l ike water


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Airflow characteristics

Garden Hose

Cover opening with thumb

As your thumb begins to close up the hose opening the following occurs:

Thumb feels increased pressure = increased static pressure

Water from hose shoots farther = increased velocity

Same volume of water flows.up until the point where your thumb can

apply more pressure that that of the water coming from the hose. Then

youre reducing the volume of water.


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Duct Design for Zoning

The main principle of duct design forforced air zone control is to maintain a

constant volume of air (CFM) through

the HVAC unit, when only one zone is

open and maintain adequate airflow

when all zones are open.Be carefu l no t to oversize the duct sys tem.


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Duct Design for Zoning

Over-blow/SizingSystem that are 2 or 3 Zones and similar in size

Using Single Speed Blowers

By-PassUse a separate controlled duct to relieve excess air

Distributed Relief

Using Minimum Position or other method toreleive air into satisfied zones.


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Three Methods Stated in NEW ACCA Manual Zr


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Duct DesignNew Installations

Example

2-1/2 Ton

(1000 CFM)

Blower

600 - 700 CFM (60-70%)

600 - 700 CFM (60-70%)

600 - 700 CFM(60-70%)

Over Size Each Trunk

Duct To Handle 2/3 of

Total System CFM

Remember this is a Rule of Thumb.

Should be used as a minimum.

Two Zones would be more like 700 CFM/zone.

Three Zones would be more like 600 CFM/zone.

Have an adequate numbers of take-offs for each zone.


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Duct Design

2-1/2 Ton(1000 CFM)

Blower

600 - 700 cfm (60-70%)

600 - 700 cfm (60-70%)

600 - 700 cfm(60-70%)

Five 6 Round Branch Ducts on Each Trunk

Duct

By-Pass is typically not

required.


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Air moves into the zone duct at a higher velocity and pressure,but not enough to over come the static rating of the blower.


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Duct DesignFor Rectangular

System CFM Zone Duct Outlets

800 CFM 12 x 8 5-6 Rounds

1,000 CFM 14 x 8 5-6 Rounds1,200 CFM 16 x 8 6-6 Rounds

1,400 CFM 18 x 8 5-7 Rounds

1,600 CFM 20 x 8 5-7 Rounds2,000 CFM 22 x 8 5-8 Rounds

*Learn this chart youll know whether or not a by-pass is needed or not.

Minimum Zone Duct Sizes

and Outlets Where By-Pass

is NOT REQUIRED


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Duct DesignFor Round Ducts

System CFM Zone Duct Outlets

800 CFM 12 Round 5-6 Rounds

1,000 CFM 12 Round 5-6 Rounds1,200 CFM 12 Round 6-6 Rounds

1,400 CFM 14 Round 5-7 Rounds

1,600 CFM 14 Round 5-7 Rounds2,000 CFM 16 Round 5-8 Rounds

Minimum Zone Duct Sizes

and Outlets Where By-Pass

is NOT REQUIRED


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B P L ti


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By-Pass Location

2-1/2 Ton

(1000 CFM)

Blower

600 CFM

300 CFM180 CFM

120

CFM

Return Air Duct

By-PassDuct

Static Pressure

Regulating Damper

Typical By-Pass Application

Lessens the need for Capacity Controls.

Always try to run by-pass into return asfar away from blower as possible.

Air By-Passedfurther away fromblower has moretime to mix with RAand be temperedby RA from otherareas.


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Typical Duct Layouts


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HVAC

Unit

Parallel Supply & Return Trunks

Supply

Return

Zone Each Branch Duct

SPRD


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Dump Zone

2-1/2 Ton

(1000 CFM)

BlowerReturn Air Duct

HallwayEntrance Foyer

Common Area with suppliesfrom Dump duct on one end,

return on other end of area.


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z ng e y


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z ng e y-Pass

Total CFMSmallest Zone CFM= By-PassCFM1,200 CFM (3Tons) - 300 CFM = 900 CFM for By-Pass


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B i B P D


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Barometric By-Pass Damper

CFM Capacity SPRD Size

1,000 CFM 12 x 81,200 CFM 12 x 10

1,400 CFM 12 x 12

1,600 CFM 20 x 8

1,800 CFM 20 X 10

2,000 CFM 20 X 12

CFM Capacity SPRD Size

300 CFM 7

400 CFM 8

600 CFM 9

750 CFM 10

1,200 CFM 121,800 CFM 14

2,400 CFM 16

3,000 CFM 18

4,000 CFM 20


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The counter balance weight moves up and

down the arm.The arm can also be offset to the blade to

add more or less weight.

All Zones Open the By-Pass should be

closed. As the larger zones Close, the by-

pass opens to relieve the excess air.

To adjust, close all zone dampers, except

for the smallest zone. Check the static and

noise level and adjust by-pass damper

open to maintain that level,

M d l ti B P


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Modulating By-Pass

Operates Independently of the Zone Dampers

Modulates based on static pressure in ductsystem.

Opens as duct pressure increases above 0.3

W.C.

Closes as duct pressure drops below 0.2 W.C.

Stops between 0.2 and 0.3 W.C.

By-Pass Control needs a dead band.

Do Not want by-pass to HUNT seeking balance.

Insure a by-pass sensor matches the systemstatic Higher for Commercial Applications thenResidential

Static Pressure Switch

Modulating

ZD Damper

ModulatingRD Damper


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i d i bl d


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Zoning and Variable Speed

Number of Zone Dampers Closed

StaticPressureandFanSpeed

0 1 2 3

0.4

0.3

0.2

0.1

All Dampers

OPEN


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i d i bl S d


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Zoning and Variable Speed

Number of Zone Dampers Closed

StaticPressureandFanSpeed

0 1 2 3

0.4

0.3

0.2

0.1

Static Pressure Control Range

As By-Pass Damper Opens Static Drops, Blower Slows

By-Pass Damper Closes


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O h F f B P


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Other Forms of By-Pass Distributed Relief

2-1/2 Ton

(1000 CFM)

Blower

600 CFM

300 CFM180 CFM

120 CFM

Return Air Duct

CAUTION:

If smaller zone faces north and largerzone is south with a lot of solar gain,could cause overheating on coolersunny days.

Set larger Zone Dampers to a minimum

position or undersize damper to duct.

This allows continuous air circulation to

all zones.

May be enough not to require a separate

by-pass.

Keeps main zones from calling as often.


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HVACUnit

Upstairs ZoneDownstairs Zone

Damper Cells on Plenum

Top

View

Plenum Split can go inalmost any direction.

Dampers install side by

side in top or plenum.

GREEN SAVINGSSUSTAINABLE COMFORT


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Multi-Zone Damper Cells Top View

3 Zones4 Zones

2

12x10

1 20x84 10x10

Based on typical 20x20 plenum. Sizes can be whatever fits. Use your ductulator.


A 3 Z Pl S t


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A 3 Zone Plenum System

2 12x10

1 20x8


Living Room Dining Room

ndFloorBedroomsKitchenFamily Room


A 4 l S


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A 4 Zone Plenum System

4 10x10


Living RoomDining Room

ndFloorBedrooms

KitchenFamily Room

MasterBedrooms



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14

10

10

10

10

12

12

7

7

7

7

7

7

7

7

Round Duct Layout using Flex Duct

Outlets to

individual

rooms.

RD Zone Damper

Ductboard triangles splitduct and provide good

diffusion



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HVACUnit

Return

Supply

Up Down

Up DownUp DownUp Down

Up Down

Up Down

Up DownUp Down

PROBLEM?


Zone Economics


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Zone Economics

HVACUnit

Return

Supply

Up Down

Up DownUp DownUp Down

Up Down

Up Down

Up DownUp Down

SOLUTION!

Run a second trunk parallel to main.

Move one zones outlets to new trunk.

Add dampers to main and new trunk.

NOTE: Ductwork is

CHEAPER than

dampers!


Zoning Plan


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Zoning PlanDetermine the number of Zones

Review the Duct LayoutPerform Takeoff to get the size and number ofdampers

for each zone

Zoning List


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Existing Systems


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Existing Systems

Zoning Retrofit Systems


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g y

Overhead Attic Systems

Ducts easily accessible

Simply cut-in dampers

Easy to run wires

Mount Panel near unit

Use Wireless Thermostats

Shut off unused roomsBalance Temperature between rooms

The larger the house the greater the need.


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Retrofit Zoning Dampers Insertable


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g pRound Dampers

Cut a 3/4 slot in the duct

Insert and secure with screws, provided

Model RRP with Plug-In Motor

Model RRM with 24VAC Three Wire Motor

Outlet Zone Damper


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Retrofit Zoning Zone Each Branch Duct


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Retrofit Zoning

HVAC

UnitSupply

Return

Zone Each Branch Duct

By-Pass

Outlet Zone

Damper

Retro-Round

DamperMain

Thermostat

Wirelresss

Thermostat

Wirelresss

Receiver


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Zoning Commercial


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g

Is this your idea of Zoning?


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Zoning Commercial


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Spring Return Zone Dampers


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Rectangular/Square Side Mount

Round Single Blade

All Dampers are 24 VAC, 7 Watts.

Power Closed, Spring Open (Fail-Safe Operation).

All Dampers Reversible to Power Open

Adjustable Minimum Position Close.

NEW Silent Spring Return MotorRectangular-Square

Bottom Mount


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Adjustable Minimum Position


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Adjustable Minimum Position

All Spring Return Dampers can be

easily adjusted for a Minimum Positionwhen closing to allow a minimumamount of air for by-pass and aircirculation.

With the damper Normally Open

Loosen the Set Screw

Move set screw and align with desiredminimum position and tighten.

Power damper closed and damper willstop at minimum position.

NOTE: This set screw and label does not

indicate the damper position and is used only to

set the minimum position.

March 23-25, 2011Landsdowne, VA2004-11 ZONEFIRST

Other Damper Applications


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Other Damper Applications

Rectangular/Square Side Mount

Round Single Blade

Fresh Air Intake/Make-Up Air

Return Air Control between high and low

returnsAutomatic Humidifier Damper

Wherever theres a Duct, Theres a need for

a need for an automatic damper.

Rectangular-Square

Bottom Mount


Independent Zone


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Use a thermostat to

operate a single or

multiple dampers.

NO Control of the

HVAC.

Used for over conditioned

rooms or zones.

RY W G C


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TWO and THREE ZONE

Non-Expandable

Single Stage

Gas-Oil-Electric Heating and Cooling

Two Stage and Heat Pump

Two Stage Heat/CoolElectric HP & Dual Fuel

FOUR ZONE

Expandable to 10 Zones

All-In-One

Up to 3H/2C and Heat Pump (No Dual Fuel)

All Panels operate the same.

All Zones Satisfied All Zone Dampers Open

Any Zone Calls Calling Zone Remains Open

Closes Dampers to Satisfied Zones


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Single Stage Heat/Cool


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System LED Power LED

Leaving Air Sensor

24V. Transformer

HVAC Unit

Zone

Dampers

Zone

Thermostats

Set-Up Jumpers

Fan On In Purge

Fan On In Heat

Test

No Sensor

Jumper

Single Stage Heat/Cool


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H32 Zone Control Panel


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Push-In Wiring Bocks, NO SCREWS!

Color Coded Terminals

Three (3) Zone Control Panel

Single Stage, Two Stage and Heat Pump

Built-In Dual Fuel Kit

Compatible with Any Thermostat

LED Readout for System Status

Remote Leaving Air Sensor Control

Outdoor Air Sensor for HP Fossil Fuel

Built-In Stage Timer Eliminates Need for Two Stage

Thermostats

DIP Switches Configuration

Reliable Relay Output for Dampers and HVAC

Equipment


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MZS4 Zone Control Panel


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MZS4 Zone Control Panel

Push-In Wiring Bocks, NO SCREWS!

Color Coded TerminalsFour (4) Zone Control Panel

Expandable with Zone Adder Panels

Single, Two Stage and Heat Pump

Compatible with Any Thermostat

LED Readout for System Status

Remote Leaving Air Sensor Control

Built-In Stage Timer Eliminates Needfor Two Stage Thermostats

8 DIP Switches for ConfigurationReliable Relay Output for Dampersand HVAC Equipment

Built-In Re-settable Fuse


MZS4 Panel Wiring Diagram


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Outdoor Unit

HVAC Equipment

Indoor Unit

T24 VOLT 40VA

TRANSFORMER

ZONE1

ZPS SENSOR

Z

ONE2

ZONE3

ZONE4


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Zone Thermostat and Damper Connections


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Thermostat Connections

FAN - G

COOL - Y

TRANSFORMER - R

HEAT - W

TRANSFORMER - C

Damper Connections2 Wires

Single Stage and Two Stage 4/5 Wires


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Heat Pump Thermostat and Damper Connections


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Heat Pump Thermostat Connections

Emergency Heat* E

Fan - G

Cool - Y

Trans.(Hot) R

Reversing Valve - O

Trans(Common) - C

Damper Connections

2 Wires

*Emergency Heat Termiinal only makes on a call for Emergency Heat and will lock out compressor. Do not use thermostats with W 2/E as second stage call will also lock out compressor.


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HVAC Equipment Connections - Single and Two Stage


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HVAC Equipment Connections Single and Two Stage

Instead of wiring to the thermostat, wire tothe zone panel just like the thermostat.

Second Stage Heat

First Stage Heat

24V Transformer

Fan Relay

First Stage Cooling

Second Stage Cooling

Outdoor Unit

HVAC Equipment

Indoor Unit

Common


Heat Pump Equipment Connections


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Instead of wiring to the thermostat, wire to the zone panel just

like the thermostat.

W - Second Stage Heating Relay

E - Emergency Heating Relay

R - 24 Volt Transformer (Hot)

G - Fan Relay

O- Reversing Valve Relay - Cool

Y - Compressor Relay

B - Reversing Valve Relay - Heator


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Zone Plenum Sensor Model ZPS


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Protects HVAC Equipment from over-heating or over-cooling when only a few zones are calling and/or air is

being bypass through the return. Leaving Air Sensor is placed in supply air plenum, out of line of sight of heat

exchanger, evaporator coil and before radiant strips on a heat pump.

Adjustable setting on heating from 100F to 170F on panel.

Cooling is fixed at 45F.

NO SENSOR JUMPER When not using this sensor place jumper across these

pins. If jumper is not in place System LED will flash and HVAC Unit will not

activate.

Adjustable Heating Limit Dial


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24 Volt Transformer


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24 Volt, 40VA Transformer, Model T24

C - Common

R - Hot

A separate 24 Volt, AC, 40VA Transformer is recommended to power the zone

panel, thermostats and damper motors.

The re-settable fuse protects the board and transformer from accidental shorts. If

the board is not operating, check for to see if HOT. If it is remove all wiring to

the circuit board and apply only the 24 Volt Transformer to the panel. The panel

power LED will illuminate showing the board is operating and now to check for

the short, somewhere.

Re-settable Fuse


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MZA2 Zone Adder


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Using a RJ11 (six conductor) telephone jack cord connects the main panel

to the adder panel. Adds two zones to the MZS4 Zone Panel. Up to 3

MZA2 Panels can be used to add up to 6 zones for a total of 10 zones.

Each Zone Adder panel comes with a 7 foot cable.

To additional Zone

Adder Panels.

MZS4 Panel


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The Advantage


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The Advantage

EZ Wir ing

Plug and Play

Color Coded Push-In

Thermostat Connections

Plug-In Damper Motors

Using RJ11 Telephone Wire

Simplifies Wiring

Wire in a Fraction of the time.

Eliminates Mistakes


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Plug Play Zone DampersSide Mount


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Damper LED GREENOpen

RED- Closed

25 Modular Cord

Included w/each Damper

Dual Motor Connections

Daisy Chain up to 10 Dampers/Zone

Retro-Round Damper - RRP

Bottom Mount

ZDBP

ZDSP

Outlet Damper

OZD

Round Damper

RDP


2004-11 ZONEFIRST

Its Too Complicated?


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Zone 1 Supply Air Duct Zone 2 Supply Air Duct

T T

4/5 Wire Thermostats for each Zone

2 Wire Dampers for each Zone

24V-40VA Transformer to Power Control

Panel and Dampers4 Wires (Y-G-R-W) to HVAC Unit

By-Pass Damper from Supply to Return

Zone Plenum Sensor in Plenum

ZONE

THERMOSTATZONE

THERMOSTAT

ZONE DAMPERS

TRANSFORMER

CONTROL

PANEL

Zone Plenum

Sensor

Return

AirDuct

By-Pass Damper

BLOWER

HEAT EXCHANGER


2004-11 ZONEFIRST

Its Too Complicated?


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p

Damper Installation:

1. Cut a 4 slot in the side of the duct.

2. Slide the Damper in.

3. Secure with self-tapping screws provided.

The rest is simple wiring, using standard thermostat wire:


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Troubleshooting Zoning


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What can/does go wrong?

Wiring Disconnected or changed

Damper Motors Wear OutVolt/Ohm Meter to Check

All 24 Volts

Three Basic Problems

Heat/Cooling wont come on

Heat/Cooling wont shut off

Dampers not Operating


2004-11 ZONEFIRST

Troubleshooting Zoning -


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Troubleshooting Zoning Damper


ON24VAC

Damper PowerCheck 24V across COMOPENCheck 24V across COM-CLOSECheck 24V at PanelCheck 24V at Damper

Troubleshooting Zoning -


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Thermostat


ON24VAC

Ohm Thermostat Wires at Panel (non-powered)Disconnect Wires from PanelOhm R-W Heat CallOhm R-G Fan CallOhm R-Y Cool Call

Check 24V from Thermostat (Powered Stat)Common must be wired to C on Panel

All other wires disconnected.Check 24VAC - C-W Heat CallCheck 24VAC - C-Y Cool CallCheck 24VAC - C-G Heat CallCheck 24VAC - C-E Em.Heat Call (Heat PumpStat)

Jumper Panel Thermostat TerminalsR-W Heat Call - RED System LEDR-Y Cool CallGreen System LEDR-G Fan CallYellow System LED

Troubleshooting Zoning - HVAC


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2004-11 ZONEFIRST

ON0 Ohms

Check Panel Terminals

Ohm R-W Heat Call

Ohm R-G Fan Call

Ohm R-Y Cool Call

Insure 24VAC at Panel

Outdoor Unit

Indoor Unit

Zoning vs. Multiple Units


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g p

Try this exercise using two units:

Two Units vs. One Unit and Zoning

2 - 50,000 BTU 80% Furnace @ $565.00 each =$1,030.00

Vs.

1 100,000 BTU 80% Furnace @ $800.00 each = 20% $avings

And

2 24,000 BTU 13 SEER Condensers (w/coil/tubing) @ $1,324 ea. = $2,648.00

Vs.1 42,000 BTU 14.5 SEER Condenser (w/coil/tubing/)@ $2,346 = 11% $avings


2004-11 ZONEFIRST

Zoning vs. Multiple Units


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g p

Try this exercise using two units:

Two Units vs. One Unit and Zoning

2 - 50,000 BTU 80% Furnace @ $565.00 each =$1,030.00

Vs.

1 100,000 BTU 80% Furnace @ $800.00 each = 20% $avings

And

2 24,000 BTU 13 SEER Condensers (w/coil/tubing) @ $1,324 ea. = $2,648.00

Vs.1 42,000 BTU 14.5 SEER Condenser (w/coil/tubing/)@ $2,346 = 11% $avings


2004-11 ZONEFIRST

Zoning vs. Two Units = $avings


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g g

Two Units vs. One High Efficiency Unit with Zoning2 80% AFUE (50,000 BTU) 1,030.00 vs. 1 80% AFUE (100,000 BTU) 800.002 13 SEER 2 Tons A/C 2,648.00 vs. 1 14.5 SEER 3.5 Tons A/C 2,346.00

1 2 Zone System 514.503,678.00 3,660.50

Plus other incidental savings of:Only one electrical disconnect.Only one condensing unit pad.


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Downs izing and Eff ic iency


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Downs izing and Eff ic iency

Ratings

Take a typical home that requires 100,000 BTU.

Zone house using 2 separate furnaces.

Typically use 2-50,000BTU Furnaces.

Being that cost is often a driver in the HVAC Businessthe units are minimum efficiency.

2 x 50,000 BTU = 100,000 BTU x 80%AFUE = 80,000 BTU

1 x 90,000 BTU = 90,000 BTU x 90%AFUE = 81,000 BTU


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Cooling Efficiency and Zoning


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Use a sample home sized for 4 Tons of A/C.

Zone house using 2 separate air conditioners.

Typically 2-2 Ton A/C. Being that cost is often a driver in the HVAC Business

the units are minimum efficiency.

2 x 24,000 BTU = 48,000 BTU x 13 SEER $336.00

1 x 42,000 BTU = 42,000 BTU x 16 SEER $491.00

-12% 6,000 BTU +20% SEER


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Zoning and Efficiency


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Two Smaller

Lower Efficiency Units

One Larger

Higher Efficiency Unit

and ZONING

50MBTU

80% AFUE

50MBTU

80% AFUE

2 Ton

13SEER

2 Ton

13SEER

3.5 Ton

14.5 SEER

Two UnitsTotal

80MBTU

4 Tons

One Unit

with ZONINGTotal

81MBTU

Same Capacity

10% More Efficient

3.5 Tons

23% More Efficient

12.5% Less Capacity

vs.

90MBTU

90% AFUE


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Zoning Heat Pumps


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Every Heat Pump should be ZonedSized for Cooling Load

Limited Heating Output

Undersized for Heating Loads

Require back-up on colder temps

Zoning Heats Single Zones

Capacity of Heat Pump = Zone Load

Lessens the need for back-up heat


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Zoning and Efficiency Ratings


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g y g

Try this exercise with a contractor using two units in

new construction:Review the previous two slides using the brand

equipment he uses.

After calculating using one unit vs. two, ask to see hisequipment pricing and price out the 2 lower efficiencyunits vs. the one higher efficiency unit.

Compare the costs and add in a Zoning System.

Find the difference. In many cases the equipment costmay be the same or somewhat less for the single unit. Thedifference can be used to pay for the zoning system.


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How do you get zoning sales??


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y g g

Quote it on every job.

Hydronic Systems its Automatically Included.

Point out that they may have zoning in their car,but not in their home.

Sell the benefit of added comfort.

Sell the benefits of 25% Energy Savings, the systemwill pay back for itself.

Sell the benefit of convenience of being able tocontrol the temperature where you are.

Its just common sense, like a light switch!


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Zoning Information


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Product Catalog Design Guide

www.zonefirst.com

1-877-FIRSTZONE


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By-Pass Calculator CD Catalog

Q & A


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Q & AQuestionsand Answers

Documents

2011FOSTER Understanding Zoning