Quick Answer: Can You Oversize A Tankless Water Heater?

Can tankless water heater be too big?

However, tankless water heaters are limited by how much water they can heat at any given time.

Choose too small of a system and it won’t have the capacity to provide enough hot water to meet your household needs.

Go too big and you will overpay.

This is why proper sizing is key – before making a purchase..

What are the pros and cons of tankless hot water heaters?

Are Tankless Water Heaters Worth It? 10 Pros and ConsPro #1: Instant Hot Water. … Con #1: Inconsistent Temperatures. … Pro #2: Longer Lifespan. … Con #2: Higher Initial Cost. … Pro #3: Lower Month-to-Month Costs. … Con #3: Limited Hot Water Supply. … Pro #4: Space Savings. … Con #4: Additional Equipment is Often Necessary.More items…•

Are tankless hot water heaters worth it?

Both rate Good for energy efficiency. … Tankless: Gas and electric tankless water heaters run more efficiently than the conventional water heaters of the same fuel type. We rated the annual energy consumption cost Excellent for a gas model but only Fair for an electric, but both rate Very Good for energy efficiency.

What size tankless water heater do I need for a family of 3?

Sizing Guide For Tankless Water Heaters: Equivalents TableHow big is your familyHow big was your old water heaterCapacity required (in gallons per minute – GPM)1-2 people30, 40, 50 gallons3, 4, 5 GPM2-3 people40, 50+ gallons4, 5, 6 GPM3-4 people50, 75, 80 gallons6, 7, 8 GPM5+ people75, 80+ gallons8, 9, 10, 11 GPM

Is tankless water heater better than tank?

According to Energy.gov, “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.

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.

What size tankless water heater do I need for a family of 5?

In short, a family of 5 would need a 10 GPM gas tankless heater or 27 kW electric tankless heater if you live in the northern part of the USA where the input water has a lower temperature. There the tankless heater has to work extra hard to bring the water temperature up to 110˚F or 120˚F.

Can a tankless water heater work for the whole house?

Whole-House Tankless Water Heater Whole-house units have higher GPM flow rate capacity and can handle the demand for more than one fixture at a time. … That’s why you may need more than one whole house tankless water heater hooked up in parallel to meet your hot water demands, especially for simultaneous shower usage.

What is the best tankless electric water heater?

The Best Electric Tankless Water Heater Reviews. 1.1 1. Ecosmart ECO36. 1.2 2. Stiebel Eltron Tempra Plus. 1.3 3. Rheem RTEX-13. 1.4 4. Bosch WH27. 1.5 5. Titan SCR2 N-120. 1.6 6. Sio Green IR260 POU. 1.7 7. Sio Green SIO18. Pre-Purchase Considerations. Conclusion.

How much does it cost to install a tankless water heater from Home Depot?

The Home Depot offers traditional water heater tanks and modern tankless units, both powered by either gas or electricity. Depending on your selection, the average cost for water heater installation is between $1,000 to $3,000.

How big should my tankless water heater be?

You’ll need to be able to heat at least 5.2 gallons of water. So you’ll need a tankless water heater that can produce at least a 60 degree rise in temperature at 5.2 gallons per minute.

Is a tankless water heater good for a large family?

From a comfort standpoint, a tankless model can ensure hot showers for the whole family, enough warm water for dishes and laundry and a restful soak in a warm bath after a long day at work. … Tankless heaters alone can lag if you need hot water for showers and dishes at the same time.

What size tankless water heater do I need for a family of 4?

Sizing Guide for Residential Tankless Water heaterHousehold OccupantsUsageCapacity Required (Measured in Gallon)2-3 peopleHigh40-503-4 peopleRegular/Low40High50-756 more rows

How often should a tankless water heater be flushed?

To properly maintain and clean your tankless water heater, it’s important to flush those mineral deposits at least once a year. Follow this simple process to ensure optimal tankless water heater performance and efficiency.

Can I install a tankless water heater myself?

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.

Where should a tankless water heater be installed?

The best place to install the unit is on the second floor. This is assuming that your laundry room is in the basement or first floor. Ensure that the heater or outlet water pipe doesn’t touch the combustible materials. Keep a distance of 24″ between the combustibles, the water heater, and the output hot water pipe.

How long will a tankless water heater last?

20 yearsMost 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.

Do tankless water heaters need maintenance?

The good news is that tankless water heaters don’t require much maintenance, either. A tankless system should be serviced as a part of the regular preventive maintenance that heating and cooling systems receive. Electric or gas components should be inspected.