Venting Gas Furnace And Hot Water Heater

Over the years we have received many questions regarding combined venting of furnaces and water heaters.

Venting gas furnace and hot water heater.

When installed correctly this venting arrangement works with an 80 gas furnace or lower than 80 gas water heater. The function of these fins on the gas water heater flue vent connector is to try to increase the transfer of heat from the water heater exhaust into the surrounding area maybe to make it warmer in a fantasy that we re cutting heating cost by exracting heat perhaps in hope of preventing frozen pipes nearby. 4 flexible chimney liner runs from basement up 1st floor and out to roof. Proper furnace water heater venting is an extremely important issue which depends on the performance of the house chimney chimney flue or other exhaust assemblies.

Common venting of gas appliances. Atmospheric venting refers to a system in which exhaust from the water heater naturally rises out of the appliance s combustion chamber then travels up through a standard chimney style flue. The conditions explained in this post also apply to the wood burning appliances. Only thing hooked up to it is a 75 000 btu gas furnace with a powervent blower or direct vent.

The photo below shows typical combined furnace water heater venting. This is called a common vent configuration. Water heater ducts may lead directly outdoors or they may tie into a larger vent duct that also serves a gas or propane furnace or boiler in the home. Rheem s prestige high efficiency natural gas combi boiler rheem s prestige high efficiency natural gas combi boiler provides an efficient continuous supply of domestic hot water used for faucets showers washing machines etc and provides hydronic space heating for residential applications such radiant floors baseboards hydronic air handlers etc.

Want to add a 40 000 btu gas hot water heater to same 4 chimney duct. Traditional masonry chimneys were designed and sized to vent very hot flue gases from old coal wood burning or low efficiency gas furnaces. By michael casey and barry stone. The main concern has been whether a gravity vented water heater flue can be connected to the fan assisted flue of a plus 80 afue rated forced air furnace.

With a replacement high efficiency furnace the existing vent pipe does not work for water heater only because the vent is too large.