When I turned the power on for the first time, I had 120° water in 5 minutes or less. I increased temp to 130°, it took less than a minute to get there. This 55 gallon water heater is like having a 199K BTU demand heater with a 55 gallon storage/backup tank. It has 5 levels of modulating from about 30K btu all the way up to 199K btu. Since the initial startup, I’ve never heard it heat the water above the lowest setting…
In the beginning, I had it turned up to 130° and tried to temper the water from the cold supply. It didn’t work too good, so I just turned the heater down to 100° and let it fill the float tank without tempering. 1st hour recovery with a 50° temperature rise is 436 gallons an hour. There is no way I should ever run out of hot water.
This type of heater is a very good alternative to a boiler and about 1/2 the price. Including an all stainless steel tank...1" supply and 1" outlet fittings. It also has fittings/provisions for space heating.
Price increase? Absolutely!