9 votes

Can a typical tankless water heater be set to very low temperatures like 70°F/20°C?

The part you need is called a mixing valve. The other answer is correct, but he OPs question is how to warm up the cold water supply. If you can't find a tankless heater with low enough temperature ...
Cheery's user avatar
  • 3,152
9 votes
Accepted

Can a typical tankless water heater be set to very low temperatures like 70°F/20°C?

To answer the title question: No. From the Rinnai manual: RE199i, RE180i, RE199e, RE180e - temperature setting 98 F - 140 F RE160i, RE140i, RE160e, RE140e - temperature setting 120 F - 140 F ...
manassehkatz-Moving 2 Codidact's user avatar
4 votes

Can a typical tankless water heater be set to very low temperatures like 70°F/20°C?

Are there other options that I should be considering? Another option you could look at is a waste water heat recovery system. This uses the heat from the water running down the drain to preaheat the ...
Jack B's user avatar
  • 216
2 votes

AOSmith Voltex Heat Pump Water Pump Stuck on Vacation Mode

Figured it out, it was a combination of user error and a misleading user interface. I had to tap the vacation mode button again to toggle off vacation mode. Half the time it would default back to ...
James's user avatar
  • 323
2 votes

What's the purpose of thie ciuculator

That is an instant hot configuration. The pump from what I can see is discharging into the cold water inlet of the hot water heater. Check the other end of the tube feeding the pump from above. I ...
Gil's user avatar
  • 6,446
2 votes

Adding 2nd unheated 50 gallon hot water tank

So, you have a recirculation system on your hot water. Which means that at some point, tepid water comes back from faucets - how often depends on how the system is set up. Most don't run all the time, ...
Ecnerwal's user avatar
  • 192k
1 vote

Water heater leak into base. Concerned about moisture or mold

Wood is damaged when it stays wet for long periods of time, like weeks and months. A 1-day incident will not be a problem. Let it dry naturally, you don't even need a fan, just time. Probably a day. ...
Cheery's user avatar
  • 3,152
1 vote

Exterior Water Heater venting

Straight up and out the enclosure roof, then continue straight up until the end is at least 2 feet above any obstruction within 10 feet (such as the higher part of the roof.) That may require bracing ...
Ecnerwal's user avatar
  • 192k

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