Showing results 1 - 50 of 62
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These schematics illustrate temporary deployment locations for probes during the commissioning process; these probes connect to smartphone commissioning applications.
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A direct-vent sealed-combustion furnace has dedicated pipes for combustion air and exhaust
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A flow grid is inserted into the filter grille/slot to directly measure airflow.
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A nitrogen pressure test was completed on this ductless mini-split heat pump using a digital manifold gauge.
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A passive flow hood is used to measure the flow rate of air that passes through a ceiling-mounted exhaust fan
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A static pressure measurement is taken on this air handler using probes on the supply and return sides of the fan.
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A vacuum decay test is performed on this ductless mini-split heat pump using a digital micron gauge for accurate measurement; a deep vacuum is achieved quickly by using large diameter, vacuum-rated hoses, and removing valve cores
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At the outlet of the dryer exhaust duct, install a hooded vent with a louvered damper
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Back-draft damper still has a piece of tape that prevented it from rattling during shipping
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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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Clothes dryers vented directly to outdoors, except for ventless dryers equipped with a condensate drain
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Dryer exhaust duct should vent directly to the exterior via a smooth, rigid metal duct
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Dryer vent is run vertical with a 90 degree bend and does not vent to the outside
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Fan CFM rating is higher than the requirement increasing the likelihood that it will meet the performance level once installed
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Fan CFM rating is higher than the requirement increasing the likelihood that it will meet the performance level once installed
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Fans from seperate dwellings exhausted together without back-draft dampers and not sealed
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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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Most residential heat pumps are installed incorrectly and with energy-wasting faults.
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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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Packing tape has been removed and damper will be able to function properly once fan is installed
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Quality installation and commissioning are critical to optimizing heat pump performance.
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Right - The exhaust duct has been mechanically fastened and sealed with mastic.
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Right - The exhaust vent duct terminates to the outdoors with a vent cover that has been properly caulked and covered with a metal pest screen.
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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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Right - This manufacturer's label shows a CFM higher than the requirement, increasing the likelihood that it will meet the performance level once installed.
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Separate exhaust fans can share a common exhaust if each exhaust fan is equipped with a back-draft damper to prevent cross contamination
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Seperate dwellings with their own seperate exhaust terminations