Showing results 1 - 50 of 198
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A boiler system can be set up with primary and secondary loops to supply hot water for multiple uses
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A Category I induced draft boiler uses an induced draft fan to pull air through the combustion chamber and to the flue
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A central fan-integrated supply system uses a fresh air intake ducted to the home's central furnace or air handler unit to supply fresh air throughout the home
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A cool room should have low enough heat gains to be easily cooled by a small single-zone cooling system such as a mini-split or a window air-conditioner as shown here
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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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A direct-vent sealed-combustion furnace has dedicated pipes for combustion air and exhaust
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A foaming cleaner is used to clean the coils inside this ductless indoor unit; a mini-split bib surrounds the unit to contain overspray and drips
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A foaming sprayer and mini-split bib are required to properly clean this ductless wall-mounted indoor unit
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A ground source heat pump with an open-loop piping system using vertical injection and recharge
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A ground-source heat pump has the same components as a standard air-to-air heat pump except that the liquid-to-refrigerant heat exchanger coil is located inside rather than outside
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A ground-source heat pump with a closed-loop horizontal “Slinky™ “piping arrangement
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A modern single-inlet direct evaporative cooler draws outside air through an 8- to 12-inch media filter
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A nylon draw band and tensioning tool are used to secure the inner coil of the pre-insulated flexible duct
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A nylon draw band and tensioning tool are used to secure the inner liner of the pre-insulated flexible duct
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A permanent awning prevents snow and overflowing ice dams from causing damage to HVAC equipment below.
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A pitot tube can be used to measure velocity pressure in a duct; at least twelve measurements are taken across the duct and velocity pressure is converted to velocity to calculate airflow
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A powered flow hood is used to measure outside air flowing into the inlet terminal of a whole-house ventilation system
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A properly sized cold climate heat pump can meet 100% of a home’s heating load in nearly any location in the United States
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A properly sized high-efficiency heat pump is located in conditioned space in a closet inside the home.
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A single ductless heat pump heats and cools the country’s first DOE Zero Energy Ready certified manufactured home.
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A small, single-zone cooling system such as this ductless mini-split heat pump can be a very effective way to provide emergency cooling with a low power draw on a backup power system.
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After securing the inner coil, cover the draw band and the seam with a generous amount of mastic
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Air handler platforms used as return air plenums can draw air from vented attics and crawlspaces through other connected framing cavities
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An energy recovery ventilator draws in fresh outside air that is filtered and circulated by the central air handler, while stale air from central returns is routed through the ERV to exchange heat before being exhausted outside.
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Anemometers, including the vane style (lower) and hotwire style (upper) are used to measure air velocity to calculate airflow
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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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By plotting the heating capacities at -4°F and 5°F and drawing a line between them, the capacity at 0°F can be estimated
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Calibrations are specific to each airflow station model and size and are needed to convert measured station pressure to airflow
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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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Category III oil-fired, sealed-combustion boiler with the burner assembly cover removed
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Collars that are specifically made for flexible duct have a raised bead to prevent the duct from slipping off
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Concept behind an evaporative cooler – warm air is cooled as the air passes through a wet medium and gives up some of its heat to evaporate the water
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Condensate from this heat pump water heater is routed to a nearby floor drain, shared with the condensate lines from a condensing gas furnace and an air conditioning coil
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Cool air flow is produced when the cooling cycle is energized (set thermostat to “cool”)
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Cooling air temperatures that can be achieved by a direct evaporative cooler at various outdoor conditions
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Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections
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