Gas tankless water heaters don’t have to use indoor air for combustion.While power-vent units require only an exhaust vent, they create additional placement concerns: They must be placed in a large enough room or a room with vents or louvers so that they have adequate make-up air for the gas combustion.
Do tankless water heaters need fresh air intake?
Indoor gas tankless water heaters need to be vented. All indoor models have an exhaust vent. Indoor models also need a fresh air intake either from a direct vent or a power vent. Direct vent models draw fresh air from outside and can be installed in small spaces.
Are tankless water heater sealed combustion?
Most fuel-fired tankless water heaters are direct vent and many are sealed combustion. Exhaust gases are blown directly out through a vent in the wall, not up a flue or chimney. Sealed-combustion units are usually configured with two separate vent pipes, one for intake air and one for exhaust air.
Does a tankless gas water heater need to be vented?
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.
Do all tankless water heaters require venting?
No. Unlike gas tankless water heaters and gas traditional tank style water heaters, electric tankless water heaters do not require any venting.
Do tankless water heaters need a condensate drain?
If you own a condensing tankless water heater, your installer should have included a drainage system to drain your water heater.Don’t worry, it’s not leaking, but rather undergoing a normal process called condensation, and Noritz makes the removal process easy with its condensing tankless models.
Can a tankless water heater be enclosed?
The tankless water heater is small in size. Thus it can be put in small spaces such as under-stair storage areas, closets, in pantries or under the sink.A tankless water heater is for indoor installation only. In case you install it outside, get a suitable enclosure.
Can an outdoor tankless water heater be installed in a garage?
As long as enough combustion air is provided, tankless water heaters can be installed in place of your old water heater or anywhere in your home. This includes utility rooms, garages, basements, attics, or mounted on outside walls.
How much ventilation does a water heater need?
As a general rule, water heaters need 50 cubic feet of air per 1,000 BTUs/hr. For example, a water heater with an input of 40,000 BTUs/hr should be in a room (often the garage) with at least 2,000 cubic feet of air.
Can you vent a tankless water heater in the attic?
Propane tankless water heaters don’t have to use indoor air for combustion. Tankless water heaters can be vented in two ways: power-vent or direct-vent.Because direct-vent units use outdoor air, they can be placed in smaller spaces, such as an attic, closet or small mechanical room.
Can you install a tankless water heater on an interior wall?
Electric tankless water heaters are designed to be installed indoors in the garage, basement, or interior wall. Both natural and propane gas tankless water heaters have indoor and outdoor models. Indoor models can also be installed in the garage, basement, or the exterior wall’s interior side to provide venting.
Can you use PVC to vent a tankless water heater?
The Rinnai Sensei tankless water heater offers 14 possible venting configurations and can use PVC, chlorinated polyvinyl chloride (CPVC), or polypropylene venting.They tolerate higher temperatures up to 194 degrees and 230 degrees Fahrenheit, respectively, and can be used with condensing tankless units.
How much space is needed for a tankless water heater?
10,000 cu. ft.
As a general rule of thumb any gas tankless water heater that uses internal combustion air musts have at least 10,000 cu. ft. of space around the unit. Confined areas (such as a closet) may require air ducts or additional air inlets.
Can a tankless water heater be installed in a cabinet?
Tankless water heaters can be installed anywhere inside your home. You can even have a tankless water heater in a bathroom! Some families with larger homes choose to install two, one for each floor, for example. Because of their small size, they fit in closets, cabinets, pantries or laundry rooms.
Can you install a tankless water heater laying down?
Can a tankless water heater be set horizontally? Yes a tankless water heater can also be set horizontally. But for a tankless water heater to be installed, you’ll need a vent adapter.
Why is my Rheem tankless water heater leaking?
A tankless water heater can develop leaks inside the heat exchanger.A corroded water heater almost always needs to be replaced. If the tankless water heater doesn’t properly vent out exhaust gases from the heat exchanger, it can cause the heat exchanger to corrode, and this can be potentially harmful to your house.
How close can a tankless water heater be to an electrical panel?
The only code requirements I’ve found regarding clearances around an electrical panel are allowing at least a 30″ working space (side to side).
Where should a tankless water heater be installed?
The ideal location for your water heater is inside the home. Most installations are small and unobtrusive so they will easily fit in a pantry, under the stairs, or under your sink. If you must place the water heater outside, make sure it’s safe from direct sunlight, rain, and insects.
Why would a tankless water heater stop working?
The ignition failure on tankless water heaters can occur to any brand and model, no matter how advanced or not it is. The failure can be caused by a problem inside the water heater or due to an external cause. Make sure that gas and water are open and electricity is ON (120 VAC supply).
What is combustion air for a water heater?
What is combustion air? It is the air necessary for a gas appliance such as a water heater to function properly. 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.
What does sealed combustion mean?
The simple definition of a sealed combustion heater is that the equipment uses only outside air for the fuel-burning (combustion) process that takes place in the equipment. A pipe is used to bring outside air into the gas burning appliance, and another pipe sends the exhaust products to the outdoors.
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