https://www.jerrykelly.com/blog/what-is-the-role-of-cold-air-returns-in-the-heating-process

Cold air returns are what allow your furnace to “inhale” your home's air. ... If you have any questions about a cold air return, or if you'd like a heating system ...

https://www.youtube.com/watch?v=vIgU3mNvdNg

Jun 22, 2016 ... Coach Tim explains heat runs and cold air returns to the furnace ... During cold weather, gas burners create heat in the heat exchanger, which ...

https://www.diynetwork.com/how-to/skills-and-know-how/electrical-and-wiring/hvac-install-an-air-supply-line-and-a-cold-air-return

He demonstrates how to add an air-supply line and a cold air return. ... that carry flue gases from the hot water heater and the furnace to the outside of the house.

https://homeguides.sfgate.com/tell-side-return-air-furnace-32656.html

The heated air side starts at the furnace, goes through the heat exchanger and then travels ... The cold air return always goes into the bottom of the furnace. ... Filter On a Forced Air Furnace; 4 Change the Filter on a Carrier Gas Furnace 58STX.

https://safetyking.com/the-importance-of-cold-air-returns/

Aug 5, 2011 ... The answer may be your return air grills- also known as “cold air ... Their purpose is to allow air to return to the furnace to be heated or cooled.

https://www.hunker.com/13401942/the-air-return-size-for-a-furnace

If the furnace is putting out 1,000 cubic feet per minute of air flow, the return system must ... They are called cold air returns, although they also return "used" air in ...

https://www.hunker.com/12403383/the-location-of-cold-air-return-vents

Every building that uses forced hot air for heating will have cold air return ... They do precisely what the name implies: return cold air from registers to the furnace ...

https://mspplumbingheatingair.com/blog/furnace-blowing-cold-air

Oct 8, 2018 ... Is your furnace running but the air that's blowing out of your vents seems cold? ... Or the gas line isn't supplying enough gas to your furnace.

https://www.askthebuilder.com/cold-air-return/

If you can't easily install a true cold air duct back to the furnace from each room, you can sometimes fake it. You can install a cold air return register above the ...

https://structuretech1.com/combustion-air-duct-connected-to-return-plenum/

Apr 9, 2013 ... During the winter, this setup pulls cold outdoor air in to the house, directly in to the return plenum for the furnace. While a combustion air duct ...