What Size Tankless Water Heater Should I Get?

What is the downside of a tankless water heater?

Tankless water heaters produce an endless supply of hot water, take up less space, have a lower risk of leaking, are safer, and have a significantly longer lifespan on average.

The main disadvantage of tankless water heaters is their upfront cost (unit and installation) is significantly higher than tank-style heaters..

Can tankless water heater be too big?

Tankless water heaters provide endless hot water on demand. … 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.

What size Rinnai do I need?

Multiply the square footage by the BTU per square foot to arrive at the total BTU rating you’ll need from your Rinnai heater. All Rinnai heaters are rated for a particular number of BTU, ranging from 8,000 up to 40,000 or more, giving you a lot of flexibility in the model you can buy.

Can a tankless water heater fill a tub?

Please remember that tankless water heaters also come in different sizes, and you need to get a unit that will deliver a strong flow to the tub. A small tankless water heater can take a long time to fill a large tub. Second, bite the bullet and just install a larger water heater in place of your present water heater.

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

Are Rinnai water heaters good?

Most Rinnai water heaters have better than average ratings and many have excellent ratings. The general consensus among consumers is that this is a trustworthy, high-quality brand. One thing many consumers appreciate is that almost all the models are available as both indoor and outdoor heaters.

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

Can tankless water heater heat whole house?

It’s true that a tankless water heater can easily heat most single-family homes. It’s also true that a tankless water heater is smaller and less expensive than a boiler or a furnace. … Systems that use a single heating appliance for both space heating and domestic hot water are called combi-systems (or combo-systems).

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.

Which is better tankless or 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 normal temperature setting for a tankless hot water heater?

120 degreesReally you’re supposed to have it at 120 degrees, but I know a lot of people like hotter water. 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.

Are tankless gas 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 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…•

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.

How much is the installation of a tankless water heater?

The average cost for installing a tankless water heater is around $2,500 – $4,500, with the average customer paying $2,808​ for a gas whole house unit.

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 you run out of hot water with a tankless water heater?

Although a tankless system can’t run out of hot water, it can be overwhelmed with demand. … If more than one tap is on-demand hot water at the same time, however, such as other showers or a running washing machine, the water heater will struggle to keep up and drain extra power.

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.

Which is better Rheem or Rinnai?

They are both super-efficient. But if we should put efficiency, capacity, and performance together, Rinnai has the upper hand. Rinnai has higher gallons-per-minute ratings than Rheem. Rinnai is the best option if you have a large family with high water demand.

What is the best brand of tankless hot water heater?

Top Tankless Water Heater Models ReviewedRinnai RUR98iN (Top Overall) … Rinnai RUC98iN (Indoor) … Rheem RTG-84XLN (Outdoor) … Rheem RTGH-95XLN (Best Outdoor) … Takagi T-KJr2 IN-NG (Indoor) … Stiebel Eltron Tempra Plus 24 (Best Electric) … Eemax EEM24027 (Electric) … EcoSmart ECO 27 (Electric)More items…