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Basic components of a gas tankless water heater include a high-powered burner, fan, and heat exchanger; condensing gas water heaters also have a secondary heat exchanger and a piped air intake to the sealed combustion chamber

Basic components of a gas tankless water heater include a high-powered burner, fan, and heat exchanger; condensing gas water heaters also have a secondary heat exchanger and a piped air intake to the sealed combustion chamber
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Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC

Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC
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Because heat pump clothes dryers recycle the hot air in the drum rather than venting it, they use 70% less energy than conventional electric clothes dryers while drying clothes in the same amount of time

Because heat pump clothes dryers recycle the hot air in the drum rather than venting it, they use 70% less energy than conventional electric clothes dryers while drying clothes in the same amount of time
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Blocking is installed above the refrigerator to keep it from tipping forward.

Blocking is installed above the refrigerator to keep it from tipping forward.
Case Study:

Builders Challenge Technology Information Packages - Cold Climate: Chicago

Case Study:

Building America Case Study: Simplified Air Distribution, Desuperheaters, and Sub-Slab Geothermal Heat Exchangers

Case Study:

Building America Efficient Solutions for New Homes: Case Study: Concord Cape Prototype

Case Study:

Building America Top Innovations 2013: Community Scale High-Performance with Solar: Pulte Homes, Tucson, AZ

Presentation:

Building Science for Dry Climates 3 - Combustion Safety

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Category III oil-fired, sealed-combustion boiler configured as a direct-vented appliance that draws its combustion air from outside

Category III oil-fired, sealed-combustion boiler configured as a direct-vented appliance that draws its combustion air from outside
Video:

CCHRC Solar Thermal

Video:

CCHRC: Combustion Safety Test

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Clothes dryers vented directly to outdoors, except for ventless dryers equipped with a condensate drain

Clothes dryers vented directly to outdoors, except for ventless dryers equipped with a condensate drain
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Combustion safety testing using a smoke pen

Combustion safety testing using a smoke pen
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Compare gas tankless water heater efficiencies on the Energy Guide labels or look for the ENERGY STAR label

Compare gas tankless water heater efficiencies on the Energy Guide labels or look for the ENERGY STAR label
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Condensing dryer

Condensing dryer
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Cooling setting adjustments on a refrigerator allow the unit to be tuned to meet the target temperature for energy efficiency

Cooling setting adjustments on a refrigerator allow the unit to be tuned to meet the target temperature for energy efficiency
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Depiction of a pool plumbing system with filter, heater, skimmer, and pool pump

Depiction of a pool plumbing system with filter, heater, skimmer, and pool pump
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Direct vent appliance installed

Direct vent appliance installed
Case Study:

DOE ZERH 2013 Case Study: e2 Homes Winter Park, Florida [2-page summary version]

Case Study:

DOE ZERH HIA 2013 Case Study: e2 Homes, Winter Park, Florida

Case Study:

DOE ZERH HIA 2014 Case Study: Imery Group Proud Green Home, Serenbe, GA

Case Study:

DOE ZERH HIA 2014 Case Study: One Sky Homes, Cottle Zero Net Energy Home, San Jose, CA

Case Study:

DOE ZERH HIA 2017 Case Study: Thrive Home Builders, Courtyard Rows, Lone Tree, CO