For a heating system's cold air returns to function effectively, a house needs them in every room, open and uncovered, ensuring the even distribution of heat. Depending on the size and configuration of the house, cold ai... More »

A heating furnace may blow coldair due to the wrong thermostat setting, a dirty filter, dirty sensor or simply clearing out the initial cold air in the vent. It's not unusual for a furnace to initially blow cold air befo... More »

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Cold air return vents work by allowing cool air to be suctioned into a furnace or heating/air conditioning system. The cool air is then heated or cooled, depending on the system setting, and forced back out into the home... More »

Kerosene heaters have a very high energy efficiency, and blowers help by improving their heat distribution and air circulation for the whole room. Thus, for kerosene heaters with blowers, rooms heat up faster than those ... More »

www.reference.com Home & Garden Heating & Cooling

Registers are the vents in a heating, vacuum and air conditioning system that allow air leaving the ducts to enter a room while grilles cover the return vents to the air handler. Registers often have a damper that allows... More »

An Aquatherm heating system uses the gas or oil water heater in the home to provide heat to an air handler, which then warms the house. It normally requires installing a larger water heater with greater BTU input but sav... More »

An HVAC gas pack is a heating and cooling system with the heat pump and the air conditioner housed together in a single unit. HVAC gas packs use propane, natural gas or oil for heating purposes, and for cooling purposes,... More »