Does it make sense to have 2 tankless water heaters?

Does it make sense to have 2 tankless water heaters?

You’ll need two tankless water heaters if: If your household typically exceeds 9 gallons of hot water usage per minute. Taking two showers and running a clothes washer or dishwasher can easily exceed 9 gallons of hot water usage per minute. If you have bathrooms or your kitchen is on opposite sides of the house.

Can you run tankless water heaters in series?

Tankless electric water heaters can be installed in series.

Can I have 2 hot water heaters?

If tanks are different size or types and are not identical to each other, then connecting in series, or cold into both heaters (as shown above) are best choices. This means a 50 gallon gas and 30 gallon electric, or two different size gas, or 2 different size electric can be plumbed together without problem.

Is it better to have two water heaters or one big one?

Greater efficiency can be achieved by installing multiple, smaller tankless water heaters throughout the home. Hot water is then drawn from nearby tankless appliances instead of being lead through the home’s entire plumbing system from basement to point-of-use.

Do I need more than 1 tankless water heater?

In most cases, you need only 1 tankless heater for an entire house. However, if you really have a big house (2+ bathrooms), even the big 11 GPM Rinnai gas tankless water heater will not be enough to satisfy all your simultaneous hot water needs. The big tankless heater takes care of the most hot water needs.

Do I need an expansion tank?

If your home has a “closed” plumbing system, then yes, you’ll need an expansion tank. You see, homes have either an open or a closed plumbing system. A closed plumbing system prevents water from flowing in the reverse direction (i.e., water won’t flow back into city lines once it enters your home’s pipes).

Why would a house have two hot water heaters?

If you have fixtures or appliances located some distance apart, it may be advisable to install two or more point-of-use on-demand water heaters to avoid unnecessary energy losses and prolonged delivery times.

How many tankless heaters do I need?

For larger households that typically use more than 85 gallons per day, two tankless systems, or the largest available model, are likely needed. For smaller households that use under 40 gallons per day, one unit should suffice.

Why do some homes have 2 hot water heaters?

In series, the water comes in to the first water heater, then passes through the second hot water heater, and finally goes to your fixtures. If you turn off the second water heater, then the water in the second one cools down between uses. This results in very long warmup times.