Can you replace a tank water heater with a tankless?

By Robert Flores / October 26, 2022

Yes. The initial cost of converting your tank water heater to a tankless is expensive. Tankless water heaters are 3x more expensive than your average tank water heater. However, the energy savings and supply of endless hot water can outweigh the cost for many. Feb 18, 2021

Do you need a professional to install a tankless water heater?

Tankless water heater replacement is a complex process that involves the skills of a highly trained technician. Unless you are experienced and comfortable enough to solder pipe, make gas connections and following local codes, hire a licensed professional.

How much propane does a tankless water heater use per month?

Gas cooktop/range – 65,000 BTU/hour or 5 to 10 gallons per month. Tankless water heater – 40,000 BTU/hour or 1.5 gallons per day. Gas clothes dryer – 35,000 BTU/hr or less than one gallon per day. Apr 29, 2015

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How long does it take to install a tankless water?

Afterward, the tankless unit must also be mounted and connected. Tankless to Tankless Installation: This generally takes between one to three hours.

How much does it cost to buy and install a tankless water heater?

The typical range for tankless heater installation is between $4,500 and $6,500, averaging out to around $5,500 (including the water heater, warranty and tune ups). The tankless heater installation without the unit can cost between $1800 and $3500, averaging out to around $2650. Aug 26, 2022

Does a tankless water heater need to be vented?

Tankless hot water heaters require special venting to blow hot exhaust gas outside, where it dissipates. Unlike traditional tank-style water heaters, gas tankless hot water heaters offer far more versatile venting options. Oct 15, 2012

What are the requirements for installing a tankless water heater?

Can you install a tankless water heater anywhere?

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. Oct 29, 2020

Are tankless 2022 water heaters worth it?

Yes. In fact, a tankless water heater will last almost twice as long as a conventional water heater. Traditional models with a storage tank tend to last around 10-12 years with proper maintenance. On the other hand, a tankless water heater will last for approximately 20 years. Feb 28, 2022

What size tankless water heater do I need to replace a 40 gallon water heater?

Comparing a 3.2 GPM tankless water heater to a forty gallon tank type heater is possible. For example, if a tankless unit produces hot water at 3.2 gallons per minute, this rate of flow will run a 40 gallon tank type heater out of water in only ten minutes. Tankless heaters do not store water.

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What is the most reliable tankless gas water heater?

The 5 Best Gas Water Heaters of 2022. Rinnai RU160iN RU Model Series. Takagi T-H3-DV-N-199,000 BTU Natural Gas. Rinnai RL75iN RL Model Series. Rinnai V94iN V Model Series. Rinnai V65iN V Model Series. Summary: Best Gas Tankless Water Heaters. How to Determine Which Gas Tankless Water Heater Is Best for You. More items… • Oct 12, 2022

Can you take a shower with a tankless water heater?

With a tankless water heater, you can take a shower, use the dishwasher, and do laundry all at the same time without losing hot water. On top of saving, you from the dreaded cold shower, it can also save you money and energy.

Is a tankless water heater better than a regular water heater?

According to, “For homes that use 41 gallons or less of hot water daily, demand (or tankless) water heaters can be 24% to 34% more energy efficient than conventional storage tank water heaters.” Tankless water heaters (if gas-fired) will save homeowners over $100 annually the longer they remain in service.

How do you winterize a tankless hot water heater?

How to Winterize Tankless Water Heaters. First, the heater should be turned off and the power cord unplugged. The gas and water supply lines should then be shut and the tank drained. When the water pressure reduces, the inlet and outlet water pipes should be disconnected. Nov 25, 2015

What happens if tankless water heater freezes?

Water heaters can fall prey to his icy wrath too if proper precautions are not taken. Freeze damage to tankless water heaters usually takes the form of standing water inside the unit turning into ice, expanding and damaging the internal components. Feb 9, 2017

Are electric tankless water heaters a fire hazard?

Tankless Water Heaters are Safer, But… Overall, tankless water heaters are safer than storage tanks because there’s no large holding tank that can overheat or explode. Storage tanks can have open flames and the tanks themselves can get hot; a definite hazard for small children and pets. May 17, 2018

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Can 2 people shower with a tankless water heater?

They Don’t Supply Enough Hot Water for Large Families Even the largest whole-house tankless unit may not supply enough hot water for simultaneous, multiple uses. Such a unit may be able to supply only two showers simultaneously or perhaps one shower, a dishwasher and a sink. May 6, 2020

Can a tankless water heater handle two showers?

A unit that heats 4 gallons per minute can handle a shower plus one appliance operating at the same time. A unit heating more than 7 gallons per minute can typically handle two showers and a large appliance.

Will a 40 gallon water heater fill a bathtub?

Determining if a water heater is large enough for a bathtub is actually pretty simple; the water heater tank should be about 2/3 the size of the bathtub. For example, if you have a 40 gallon water heater, it would be just large enough for a 60 gallon bathtub. Oct 6, 2011

Will a tankless water heater work with a 1/2 gas line?

A typical tankless water heater will need a ¾-inch gas line. However, if there is sufficient pressure and the run length is short enough, a ½-inch line may be sufficient with certain tankless water heaters, such as the Noritz EZ Series. Nov 8, 2018


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About the author

Robert Flores