Gas Water Heater Flue Requirements

How much does a water heater permit cost.

Gas water heater flue requirements.

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. All water heaters that burn natural gas or liquid propane lp gas require a venting system. Make sure that you chimney flue size diameter is correct. You re only looking at 20 to 100 out of pocket as opposed to several hundred dollars to call in a plumber.

Water heater installed close to the roof framing would need at least 5 long vertical vent pipe single wall vent pipe requires minimum 6 of clearance to combustible materials. The result of those calculation using a 38 000 btu water heater with a 3 draft hood and a 37 500 btu boiler with a 4 draft hood connected to a 20 high chimney is to use a common flue with an area of 28 square inches or a 6 flue vs a 5 flue in the previous examples. This is as easy as heading down to the local planning or building department to ask for one. Be sure all windows doors are closed locked.

Gas water heaters may be installed outside premises designated outdoor models not connected to a flue shall only be installed in installation requirements for domestic gas water heaters rated heat input up to 70 kw. 2 higher than building withing 10 chimney chimney flue must terminate min. Space heaters up to 50 mj h input. The process of burning of the gas is called combustion and it creates heat exhaust gases including highly poisonous carbon monoxide and moisture.

Run enough hot water for the water heater start heating. The exhaust gases and excess heat produced by your water heater are then vented back outdoors. Other appliances up to 50 mj h input. Illustrations of proper gas fired water heater venting using type b double wall vent pipe through a roof above or through a chimney below include details for the flue vent connector such as the requirement of a minimum vent connector upwards slope of 1 4 per foot of horizontal run.

Vertically below an openable window non mechanical air inlet or any other opening into a building with the exception of sub floor ventilation. Chimney chimney flue must terminate min. The first permit is for the water heater itself. Allow water heater to run continuously for 10 minutes.

A direct vent water heater draws air for combustion from outside your home rather than inside. Chimney flue size is one of the parameters that will help to achieve proper draft the water heater and a furnace exhaust gases will be discharged safely to the house exterior your life may depend on it. All fan assisted flue appliances in the direction of discharge 1 500.