Gas Water Heater Vent Pipe Size

Gpvh 40 and gpvh 50 model 40 and 50 gal 40 000 and 50 000 btu water heaters.

Gas water heater vent pipe size.

Forcing a gravity vented gas fired water heater to vent down is defying gravity impeding the draft and risking dumping fatal carbon monoxide gas into the building. The exhaust gases and excess heat produced by your water heater are then vented back outdoors. To vent properly that gas fired water heater needs 12 pipe extending vertically above h w heater. Size of the vent pipe depends on model btu rating of your appliance length of the entire horizontal and vertical pipe section and the number of installed elbows.

Typically if the existing vent that served both furnace water heater is larger than 4 inches a smaller vent pipe must be installed to serve only the water heater. However if the gas water heater draft hood is larger designed for a 4 pipe do not downsize it. Shop our amazing selection of double wall special gas vent. If the draft hood that came with your water heater has a top opening diameter designed for 3 vent pipe and you have 4 vent pipe installed use an adapter increaser to join both of them together.

Direct vent gas water heaters are a type of gas water heater best suited for use when there is insufficient ventilation within the installation space in your home. Because the new vent pipe is smaller it can often be installed inside the old vent pipe. Example based on a o. Great prices and wonderful selection of 4 inch double wall metal fab corr guard and heat fab products.

The size in gallons of the water heater. Smith water heater power vent requirements.