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A direct-vent sealed-combustion furnace has dedicated pipes for combustion air and exhaust

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A direct-vent sealed-combustion fireplace takes its combustion air directly from outside through a dedicated air inlet and vents combustion products directly outside

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

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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

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Home Performance Assessment

Information Guide

Information guide describing how to apply a whole-house approach to home improvement with energy efficiency upgrades, improved indoor air quality, and increased comfort.

Fireplaces and Wood Stoves Have Proper Ventilation

Guide

Guide describing how to provide combustion air for fireplaces and how to test fireplaces for combustion safety.

New Whole-House Solutions Case Study: Lancaster County Career and Technology Center Green Home 3 - Mount Joy, Pennsylvania

Case Study

Case study describing the Green Home 3 project, which achieved a 44% whole-house energy savings over the Building America New Construction B10 Benchmark, DOE Zero Energy Ready Home certification, and National Green Building Standard Gold-level certification.