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Old 11-02-16, 01:53 PM   #1
oil pan 4
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Join Date: Nov 2012
Location: NM
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Default Water heater replacement, conventional tank to tankless

Well it happened again. The 2nd hot water heater started leaking.
I am going to replace the narrow trailer style gas hot water heater with a tankless gas water heater.
It is110,000BTU per hour 85% efficient unit. I figure it can raise the temperature of 3gpm of water about 62°F. Even with cold winter water it should still be able to heat the water up to 100°F at 3gpm. It cost $600 and has 4 inch intake and exhaust.
There were more expensive ones, $900 buys a 7.5gpm but the intake exhaust are 5 inch.
I have a 4 inch exhaust for the existing water heater and a 4 inch exhaust for a in wall heater that has been removed.
And I ran a wireceptacle for a tankless heater a few years ago while under the house rewiring some stuff.
So the intake and exhaust holes and electrical are already there. Just add water heater.

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