Showing results 1 - 20 of 20
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A direct-vent sealed-combustion furnace has dedicated pipes for combustion air and exhaust
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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
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Furnaces, boilers, and water heaters located within the home’s pressure boundary are mechanically drafted or direct-vented
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Indoor measurement of a whole house mechanical ventilation system with a pressure balancing flowhood provides a sheltered location for measuring airflow
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National Fuel Gas Code (NFPA 2012) identifies four categories for combustion furnaces and water heaters based on combustion type (sealed or unsealed) and vent pipe temperature
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Right - The home’s ground source heat pump preheats water for the air source heat pump water heater.
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Right - This evaporative cooler is wall mounted to reduce leak effects and allow for ease of maintenance.
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The natural draft and induced draft furnace are both Category I appliances that receive combustion air from the combustion appliance zone
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The raised hood at the base of the vent stack on this water heater shows that it is an atmospheric vented gas water heater
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This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home