Tankless water heater installation requirements

 

Can a homeowner install a tankless water heater?

Installation. While it is possible to install your own tankless water heater, it’s not a job for inexperienced do-it-yourselfers. There are a number of different sizes and styles of tankless water heaters, including propane, natural gas and electric, along with single-room or whole-house sized models.

How far does a tankless water heater need to be from a window?

A tankless water heater requires a 4-foot clearance from the side or below a door or window that opens, unless the unit is directly vented to the outside. If the water heater is installed above the door or window, it needs 12 inches of clearance.

What is the downside of a tankless water heater?

The primary disadvantage of on demand or instant hot water heaters is the upfront cost. The smaller units that you often see won’t produce enough hot water to serve most households. They’ll only serve one faucet at a time—a problem if you want to shower while the dishwasher is running.

How long does a tankless hot water heater last?

20 years
Most tankless water heaters have a life expectancy of more than 20 years. They also have easily replaceable parts that extend their life by many more years. In contrast, storage water heaters last 10–15 years. Tankless water heaters can avoid the standby heat losses associated with storage water heaters.

Why is tankless water heater installation so expensive?

Their longer lifespan makes tankless units inherently more expensive. The average traditional model costs around $500, while the cheapest tankless options start at $1,000. These specialized models are also more expensive cost more to install, so labor fees must be factored into the overall price tag.

What size breaker do I need for a 220v water heater?

Understanding Water Heater Wiring
Electric water heaters require a 240-volt dedicated circuit, which serves only the water heater and no other appliances or devices. The circuit wiring typically includes a 30-amp double-pole breaker and 10-2 non-metallic (NM) or MC cable.

How often do I need to flush my tankless water heater?

As a general rule, your tankless water heater should be flushed once per year to maintain efficiency. However, the hardness of your water plays a part in this, and you may find it better to flush two to three times per year if your home’s water is especially poor quality.

How long does a Noritz tankless water heater last?

20 years
Double the lifespan – Noritz tankless gas water heaters can last up to 20 years. Peace of Mind – All Noritz instant hot water heaters include a 12-year warranty on the heat exchanger, 5 years on parts and 1 year labor.

Why does my tankless water heater take so long to get hot?

Some fixture mixing valves also create issues with tankless water heaters because of the way they balance flow between the hot and cold feeds. Most gas tankless water heaters also have a 10–15 second delay as they go through their ignition sequence.

What temperature should a tankless water heater be set at?

If you keep it at around 130 degrees, that’s as hot as you’ll ever need for a shower. The 140 degree setting is more for a commercial application and not for home showers. If you change the temperature setting to 120 degrees or at most 130 degrees, you’ll actually mix more hot water in when you’re talking a shower.

How many amps does a gas tankless water heater draw?

120 amps
One whole-house tankless water heater has four 7,000-watt elements, for a total electrical load of 28,000 watts. This load re- quires wire and a circuit breaker that will handle at least 120 amps, at a cost many times that of electrical service to a conventional tank water heater.
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