Contractors will use these words in your living room. Here's what they actually mean.
Heating, Ventilation, Air Conditioning.
An appliance fired by gas, oil, or propane in which air is heated to be circulated throughout a home in a ducted heating system.
A system for controlling the humidity, ventilation, and temperature in a building, typically to maintain a cool atmosphere in warm conditions.
A system with an indoor air handler connected to ductwork and an outdoor condenser that provides both heating and cooling through refrigerant. Think of it as an air conditioner with a reversing valve, powered by electricity. Almost every heat pump has an auxiliary electric heat source built into the indoor fan coil, used as emergency heat or when it's too cold for the outdoor unit alone.
The indoor unit in an air conditioning or heat pump system that houses the blower motor and evaporator coil — responsible for moving air throughout a home's duct system.
A standalone fan coil and outdoor condenser that heat and cool a dedicated room or area through refrigerant. Powered by electricity and extremely efficient.
An appliance fired by gas, oil, or propane that circulates hot water throughout a radiator or baseboard system to maintain a warm home in fall and winter.
An appliance fired by gas, oil, or propane that boils water to 212°F to produce steam, circulated at low pressure throughout a radiator or baseboard system.
A freestanding, typically cast-iron heating element that provides comfort heat. Radiators run on either steam or hot water, depending on the boiler type in the home.
Copper-finned or cast-iron heating elements that run along perimeter walls at floor level. Typically carry hot water at 170–180°F.
Copper-finned or cast-iron heating elements recessed into walls, which can carry either hot water or steam.
Boiler piping closest to the appliance — typically includes supply and return piping along with some ancillary equipment.
An aluminum or stainless-steel liner that evacuates flue gases from furnaces, boilers, and water heaters up a chimney safely. Oil appliances require stainless steel; gas appliances can use either. Typically installed when an older heating appliance is replaced with a newer, more efficient one.
What a qualified professional produces after accurately measuring your radiators, baseboard, and/or convectors. A new boiler can only be sized accurately by comparing these measurements to a sizing chart — it protects you from overspending on fuel.
A detailed measurement of a home's heat gain and heat loss, used to properly size a new central duct system for AC or heating and AC.
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