help sizing tankless electric water heater

6 years ago

I'm replacing a 40 gallon tank heater that is in my crawlspace with an electric tankless heater. I don't have propane or natural gas available where I live.

My first question is, can a home pass inspection with a water heater in the crawlspace sitting on dirt?

My second question is how many gpm tankless heater should I get for the house described here:

1,300 sq ft, 1 and 1/2 bath (one shower and lavatory, another just a lavatory).

The full bath is at the end of the house where the existing tank heater is.

At the other end of the house is the kitchen, washer and half bath. We don't have a dishwasher so the kitchen sink gets used quite a bit. We rarely use hot water in the washer because it takes so long for the water at this end of the house to get hot. Hot water in the half bath is hardly ever used.

I would like to replace the tank heater with a whole house heater in the same spot under the house.

I have an account at Home Depot so I'd like to use one of their brands. I'm currently looking at the Stiebel Eltron Tempra 20 2.91 gpm model. I have a very limited budget and this is in my price range. Do you think this heater will be sufficient?

I'm thankful for any input.

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