this post was submitted on 05 Jul 2023
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In that case, I would assume they’re talking about how cold the incoming water would be.
I used a tankless in a zone five area where our incoming water in the winter was often below 60 degrees. You’ll have to compare the charts of input temp and output GPH to determine how it would work for your specific use case.
I used an indoor mounted one, but there are tankless models intended for places like CA and AZ where they can be mounted outside.
We liked the endless hot water - we only had one bath and three people, so we offer were bumping against the 60 gallons of our old tank model.
Our biggest issue is that we have a huge hot water heater that takes up a whole closet. We like to down size. An indoor one would be fine. What are zones?
The tankless heater should have a map in the specs divided into zones by average water temperature. There'll then be a table that references the zones and what size you need for what you expect to heat at the same time.