1/9/2015. Create Energy Saving Comfort & Cut Costs with Affordable HVAC Zone Controls. Educate Builders on the Importance of ZONING.

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1 Create Energy Saving Comfort & Cut Costs with Affordable HVAC Zone Controls JANUARY 22, AM Richard Foster - Presenter(s): ZONEFIRST, Elmwood Park, NJ Educate Builders on the Importance of ZONING ZONING Improves Comfort ZONING eliminates Hot and Cold Spots therefore complaints ZONING can eliminate the need for additional units ZONING is not as expensive as you think ZONING is already in the Home, why not on HVAC? ZONING is starting to be favored by Utilities. ZONING $aves Energy Learning Outcomes Zone Damper Systems are applicable in all homes, large and small. Zone Damper Systems improve comfort throughout the home. Zone Damper Systems $ave Energy. Zone Damper Systems can reduce HVAC Costs. Zone Damper Systems are less expensive than you think. Zone Damper Systems reduce R/E Taxes. Zone Damper Systems reduce the electrical load. Consumers want ZONING! 1

2 American Institute of Architects (AIA) Continuing Professional Education Credit(s) earned on completion of this course will be reported to AIA CES for AIA members upon completion of the AIA/CES Session Participation Forms found in the back of this session room and online at Certificates of Completion for both AIA members and non-aia members are available upon request. This course is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. One Thermostat Controls Central HVAC System Air goes to all rooms whether its needed or not. Upstairs 2 Tons Downstairs 2 Tons Using individual HVC Units for each zone. 2

3 A 3 Zone System will still cost less than two separate units! Zone Dampers Downstairs Upstairs Master BR Upstairs Kids/Guest 3.5 Ton ½ Power than required for Two separate systems. Two Zones First Floor and Second Floor Zone One Zone Two Three Zones Zone Two Zone One Zone Three 3

4 Four Zones Zone Two Zone One Zone Four Zone Three Obstacles to Zoning? Zone Thermostats What s preventing YOU from including Zoning on every new home? Control Panel Debunking the Myths Zone Thermostats Nobody wants it. It Co$t$ Too Much. Two Systems Cost Less Too Complicated Lack of Knowledge/Training Control Panel GREEN SAVINGS SUSTAINABLE COMFORT 4

5 Why Zoning? Consumers Want It! Surveys have shown over 60% of Homeowners would pay $1,200 for zoning when offered. According to an NAHB survey, when asked what they would be willing to pay if their energy costs could be reduced roughly $1,000 a year, 51 percent checked $5,000 to $10,999 and another 16 percent said $11,000 or more. Thirty-two percent said they were willing to pay less than $5,000. Builders/HVAC Contractors Do Not Offer It. Commercial Offices are Zoned its called Variable Air Volume (VAV). Don t Heat or Cool unused zones or zone that may already be comfortable. Prevent over-conditioning Zones! Control Panel Zone Thermostats Why Not Zoning? All Hydronic and Hot Water Systems are Zoned Circulating Pumps Zone Valves In-Floor Radiant Co$ts a lot more than Forced Air 5

6 Why Not Zoning? Individual Driver and Passenger Temperature Control in your CAR? Why Zoning? You have one of these for each room? Why not one of these? What costs more, Electricity for lighting, or heating and cooling? Handbooks Reference Zoning 2009 Fundamentals Handbook - CHAPTER 17 RESIDENTIAL COOLING AND HEATING LOAD CALCULATIONS - RESIDENTIAL FEATURES Fewer Zones. Residences are generally conditioned as a single zone or, at most, a few zones. Typically, a thermostat located in one room controls unit output for multiple rooms, and capacity cannot be redistributed from one area to another as loads change over the day. This results in some hour-to-hour temperature variation or swing that has a significant moderating effect on peak loads, because of heat storage in building components Applications Handbook Chapter 1 Residences - Zoned Heating Systems Zoned systems offer the potential for lower operating costs, because unoccupied areas can be kept at lower temperatures in the winter. Common areas can be maintained at lower temperatures at night and sleeping areas at lower temperatures during the day. One form of this system consists of individual heaters located in each room. These heaters are usually electric or gas-fired. Electric heaters are available in the following types: baseboard freeconvection, wall insert (free-convection or forced-fan), radiant panels for walls and ceilings, and radiant cables for walls, ceilings, and floors. Matching equipment capacity to heating requirements is critical for individual room systems. Heating delivery cannot be adjusted by adjusting air or water flow, so greater precision in room-by-room sizing is needed. Most individual heaters have integral thermostats that limit the ability to optimize unit control without continuous fan operation. Individual heat pumps for each room or group of rooms (zone) are another form of zoned electric heating. For example, two or more small unitary heat pumps can be installed in two-story or large one-story homes. The multi-split heat pump consists of a central compressor and an outdoor heat exchanger to service multiple indoor zones. Each zone uses one or more fan-coils, with separate thermostatic controls for each zone. Such systems are used in both new and retrofit construction. A method for zoned heating in central ducted systems is the zone-damper system. This consists of individual zone dampers and thermostats combined with a zone control system. Both variable-air-volume (damper position proportional to zone demand) and on/off (damper fully open or fully closed in response to thermostat) types are available. These systems sometimes include a provision to modulate to lower capacities when only a few zones require heating. 6

7 Manual D Residential Air Distribution Systems NEW Manual Zr Residential Zoning Zoning advantages and discusses appropriate use of the zoning concept, types of systems, equipment, and components used for air damper zoning. Related topics Zoning metrics and methods Homeowner expectations Guidance for designing the entire zone damper systems Design applications of bypass air Load calculations for zoned systems Strategies for excess air management Available on-line at the ACCA Store: Zoning $aves Energy 25% Energy Savings with PROPER Zone Control How it s used. 7

8 Zoning $aves Energy NO Comfort NO Savings Savings NO Comfort Comfort NO Savings Comfort AND Savings 11% Electric Input Savings 33% Fewer Air Conditioner Cycles 1990 Energy Study done on actual home, in Minnesota. Zone Damper Systems $ave Energy 33% $AVING$ Utilities promote Zoning Public Service Electric and Gas, a New Jersey Utility Common Sense Approach 8

9 What s the criteria for zoning? Zone based on Levels/Floors Upstairs/Downstairs, Basements, Rooms over Garage Zone based Occupancy Living/Kitchen/Family/Rec/Media/Bedrooms/Master/Kids Zone based on Exposure North, South, East and West Zone based on Loads Internal Loads Fireplaces/Appliances/Passive Solar External Factors Shading Typical Duct Systems Trunk Duct Zoning The ducts are split for each zone Living Zone & Bedroom Zone Upstairs & Downstairs Branch Duct Zoning One main duct with take-offs to each zone. Install zone dampers in each branch. Up to 10 Dampers can be daisy chained. Typical Small Two Zone System Size each zone 2/3 Total Airflow Commissioning insure open zone airflow increases when opposite zone closes Add additional takeoffs when needed to prevent drafts, noise. 9

10 Small System Zoning Zone 1 Living Zone Zone 2 Bedroom Zone Small System Cost 1 - MMP2 $ RDP WTR Total List $1, NOTES: - Move BR3 duct after BR Zone Damper. -Leave Laundry, Bath 1 and Hall Open as common relief zone. Balancing Spider Duct Systems Often Cannot Be Balanced Automatic Dampers Are Best Round Damper - RDP Round Take-Off - RTP Residential New Construction Zones are similar in size 2 to 3 Zones Each zone similar in size Size each Zone handle about 2/3 of the total CFM ACCA Manual Zr refers to this as Overblow 10

11 Homes have gotten LARGER. And More Energy Efficient Their BTU s per square foot is DECREASING >.their need for Zoning is Greater Opportunities for Zoning Residential New Construction 100% Can be designed from the start. Residential Retrofit 75% Access to ductwork. May need modifications. Use Outlet Dampers Create an equal number of zones for both heating and cooling. Hydronic with A/C Overhead Add-On Same Thermostat for Heat and Cool (RH/RC) Commercial 90% Overhead ducts in False Ceilings. Retrofit for change from Single Tenant to Multi-Tenant Control Panel Zone Thermostats What do you need? Zone Dampers Zone Thermostats Upstairs/Bedrooms Leaving Air Sensor Installed in plenum Downstairs/Living Control Panel Zone Control Panel Zone Dampers Zone Thermostats Use ANY Thermostat Furnace and Air Conditioner 11

12 It s Not Complicated 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 any standard thermostat: It s Too Complicated? Zone 1 Supply Air Duct Zone 2 Supply Air Duct T ZONE THERMOSTAT Zone Plenum Sensor ZONE DAMPERS By-Pass Damper T ZONE THERMOSTAT 4/5 Wire Thermostats for each Zone CONTROL PANEL 2 Wire Dampers for each Zone 24V-40VA Transformer to Power Control Panel and Dampers 4 Wires (Y-G-R-W) to HVAC Unit By-Pass Damper from Supply to Return Zone Plenum Sensor in Plenum HEAT EXCHANGER BLOWER Return Air Duct TRANSFORMER Zoning Light Commercial Is this your idea of Zoning? Units equal 11 Tons - Instead of replacing each one as it fails, replace all with Two 5 Ton Units and Zone each into two and three zones. 12

13 Zoning Commercial Up to 20 Tons and a lot of Zones Variable Air Volume (VAV) Simplified Compatible with many BAC Net, Lonworks Thermostats ZONE THERMOSTATS TWO ZONE ADDER PANELS ZONE DAMPERS Zoning System Design Every forced air system can be zoned! Zoning can make a good system great! It can also make a poor system worse! Zoning is Not a cure all for a poorly designed system. Give Us A Duct System. and We ll Zone It 13

14 Zoning System Design Every good forced air system can be zoned! IT S 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 construction YES! It comes down to imagination and creativity. You can for different reason Occupancy Living, sleeping, recreation Exposures North, south, east, west Levels each floor be a zone Loads kitchen, solar, fireplaces Airflow Characteristics Start covering over opening with thumb Garden Hose 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 than that of the water coming from the hose. Then you re reducing the volume of water. Duct Design for Zoning The main principle of duct design for forced 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 careful not to oversize the duct system. 14

15 Zoning Heat Pumps is Crucial! Sized for Cooling Load Limited Heating Output Undersized for Heating Loads in North Require back-up on colder temps Ability to condition individual zones Capacity of Heat Pump = Zone Load Zoning Lessens the need for back-up heat Works great w/two-speed & Geothermal Myth: Two Units are Cheaper than One with Zoning? 2 x 1.5 Ton 13 SEER AC R410A 2 x 3/8" LL x 3/4" SL x Goodman GSX $1200/ each Refrigerant Line Set $200/ea. 2 x Goodman Ton Uncased Evaporator Coil Goodman CAUF3642C6 $500 / each + Goodman Ton Uncased Evaporator Coil 3 Ton 13 SEER AC R410A Goodman CAUF3642C6 Goodman GSX $500/ each $2000/ each 80,000 BTU 80% Efficiency 1-Stage, Multi-Spd. Blower Gas 3/8" LL x 3/4" SL x 25 ft. Furnace Refrigerant Line Set Goodman GMS80804BN $200ea. $1500/ each Humdifier $200 Air Cleaner $200 Heat Recovery Ventilator $900 2 x 40,000 BTU 80% 1-Stage, Multi-Spd. Gas Furnace Goodman: GMS80403AN $1200/each 1- MMP2 Control Panel 2 ZDSP SPRD12 $600 = $6,200 Less IAQ = $8,800 w/ IAQ = $4,800 $avings of $1,400 to $2,700 Based on IAQ Accessories 50% to 83% MORE Sell Zoning & Hi-Efficiency < $ Two Min. Efficiency Whip & Disconnect Whip & Disconnect 2 x 1.5 Ton 13 SEER AC R410A $1200 / each 2 x 3/8" LL x 3/4" SL x 25 Refrigerant Line Set $200/ea. 2 x 1.5 Ton Cased Coil $400 / each 2 x 40,000 BTU 80% 1-Stage, Multi-Spd. Gas Furnace $1000 / each 64,000 BTU Output + Extra IAQ Accessories Humdifier $200 Air Cleaner $200 Heat Recovery Ventilator $900 = $5,600 Less IAQ = $8,200 w/ IAQ Whip & Disconnect 2.5 Ton 16 SEER AC R410A $2200 / each 3/8" LL x 3/4" SL x 25 ft. Refrigerant Line Set $200/ea. 2.5 Ton, Cased Coil $400/ each + 70,000 BTU 95% Efficiency 2-Stage, Multi-Spd. Blower Upflow Gas Furnace $1800/ each 66,500 BTU Output Two Zone Control System $600 = $5,200 $avings of $400 to $3,000 Based on IAQ Accessories 7% to 57% MORE 15

16 Zoning and Efficiency Two Smaller Lower Efficiency Units 40MBTU 80% AFUE 40MBTU 80% AFUE 2 Ton 13SEER 2 Ton 13SEER Two Units Total 64MBTU 4 Tons vs. One Unit with ZONING Total 66.5MBTU More Capacity 15% More Efficient 3.5 Tons 23% More Efficient 12.5% Less Capacity One Larger Higher Efficiency Unit and ZONING 70MBTU 95% AFUE 3.5 Ton 16 SEER Zoning Alternatives 2-Zone H/C Multi-Split Std. Pkg (2) LMN186HVT, (1) LMU369HV - 34,000 BTU LG2HV36S $3, / each Mini-Splits will cost more when you already have ducts. Added disconnect. Permit & Electrical Inspection. Could add to Property Tax. Added space required outside. Do Not Clean, Humidify nor Ventilate Zoning and Efficiency Ratings Compare the cost of two minimum efficiency units Vs. one single higher efficiency unit with zoning. Find the difference. In many cases the equipment cost may be the same or somewhat less for the single unit. The difference can be used to pay for the zoning system. Why buy two...when one will do? 16

17 Zoning Opportunities Every Day Residential New Construction Retrofit to solve problems Overhead add-on Air Conditioning Light Commercial Surveys show over 60% of consumers will pay $1,200 for zoning in a new home, when offered and explained the benefits. Tell It.and You ll Sell It! 100% of Zoning Systems not offered, are not Sold! Homebuyers often don t know about zoning, so tell em... Offer it on every New Home. 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 Energy Savings, the system will pay back for itself. Use the ZONEFIRST App Sell the benefit of convenience of being able to control the temperature where you are. It s just common sense, like a light switch! We ve never met a plan we could not zone. 17

18 Q & A Questions and Answers So if you ever feel trapped about creating a comfortable home... Contact me: Dick Foster rfoster@zonefirst.com Head Shot