Installing a tankless water heater outside frees up indoor space and requires no additional venting. … Traditional gas tank water heater require venting through the roof. Tankless water heaters use fans to blow exhaust from the unit horizontally, allowing vents to terminate on the side of a house.
Correspondingly, can tankless water heater use existing vent?
The tankless heater cannot share vent piping with any other appliance, and it cannot use a masonry chimney flue for venting. Special stainless steel pipe. … The standard galvanized vent from your old storage tank heater would quickly rust away if your tankless heater vented through it.
In respect to this, can you vent a tankless water heater in the attic?
Simply put, as long as there is enough combustion air provided, tankless water heaters can be installed in any area of your home, from a utility room to a garage to, yes, even an old, dusty attic. … in general, most plumbers recommend simply installing it where your old water heater was located.
Can you vent gas water heater through wall?
All natural gas water heaters must be vented to the outdoors to remove the byproducts of combustion. Atmospherically venting gas water heaters is the most common type of venting option used. … The vents go directly through an outside wall, and can also bring in combustion air to the gas burner.
Does a tankless water heater have to be on an outside wall?
It is possible to install a tankless water heater outside and free up indoor space. The roof or side wall can be used as a vent for the tankless water heaters. Venting through the roof is required for traditional gas tank water heaters.
How hot does water heater vent pipe get?
If a water heater is set to store water at 140 F to minimize Legionella bacteria growth, the flue gas temperature will be about 160 F when the heater is new. As scale builds up and the heater efficiency falls off, the flue gas temperatures can easily increase to over 350 degrees F.
What is the code for venting a tankless water heater?
The water heater must be vented in accordance with the section “Venting of Equipment” of the latest edition of the National Fuel Gas Code: ANSI Z223. 1/NFPA 54 in the United States and/or Section 7 of the CAN/CSA B149.
What type of vent does a tankless water heater use?
Tankless water heaters can be vented in two ways: power-vent or direct-vent. Power-vent units use indoor air for combustion and simply vent the exhaust to the outside. Direct-vent units pull in air from the outside, so they have two vents for intake and exhaust.