Combustion Air For Furnace And Water Heater

Not to get too basic here but gas appliances require a certain amount of air to be used for combustion much the same way that the fire in your fireplace needs air to get started and to keep burning.

Combustion air for furnace and water heater. Proceed to either part a part b or part c. This is called a direct vent furnace. Through the other hose equaliz air provides combustion air for gas forced air furnaces and or hot water heaters with non sealed combustion chambers. Lack of adequate combustion air causes improper heater operation increased maintenance cost and risks dangerous production of carbon monoxide gas.

What is combustion air. There are two basic ways for your furnace to get its combustion air. Where all air is to be taken from the outdoors divide the total input of all gas appliances in the space by 4000. Total the column.

This article series explains how to recognize diagnose problems with residential heating boilers including loss of heat heating boiler noises leaks odors or smoke and high heating costs. This is the best and most efficient way to do it. If your furnace has two pvc pipes going to the outside then one of those pipes is taking the flue gases out and one is bringing fresh air in for combustion. It is the air necessary for a gas appliance such as a water heater to function properly.

Some heating appliances furnaces boilers and water heaters are designed to isolate the combustion process from the living space entirely avoiding the need for complex combustion air and venting schemes. This article explains how to recognize and fix combustion air defects on heating appliances such as boilers furnaces and water heaters. Enter the input ratings of all appliances in table 1. Most high efficiency furnaces get their combustion air directly from the outside.