garage water heater

[cparcell]

so i just bit the bullet and ordered a tankless water heater for garage. single point bosch rp9p. anyone have luck with these in there garage instead of a conventional unit.

 

[Charles (in GA)]

so i just bit the bullet and ordered a tankless water heater for garage. single point bosch rp9p. anyone have luck with these in there garage instead of a conventional unit.

Why the RP9P?

Specification sheet shows it is a 277V only. Are you in a commercial building with 3 phase power?

The RP1P is the 240v version of the same heater, same specs.

Charles

 

[cparcell]

Dirt cheap cost,20 bucks couldn't argue with it for a new heater

 

[cparcell]

Figure a 13.5% buck and boost transformer should correct it

 

[Charles (in GA)]

Oh it will work on 240v I suspect, just at a lower output.

Where did you find it so cheap?

 

[cparcell]

Oh local guy ordered the wrong one, now to find a buck boost for cheap. Do I need to worry about it really as it will just be for the garage sink. Does it kill life span on them to not boost them

 

[Charles (in GA)]

The 240v model is designed to work on 220v and 208v. It is at 75% capacity on 208v. There are no electronics that are voltage sensitive so I think it would work about the same as the 240v model being run on 208v.

My problem is incoming water temp is no more than 50° and I want about 105° output, so the 9.5kw model is not enough. There is a 12kw that at 1.5 gpm (it is a 2.0 gpm max) will give me the 55° rise in temp. Found it on Amazon for $199 free ship.

I am currently using a Titan 2.5 gal tank type under counter unit, 1500 watt 120v. OK for hand washing, but filling a bucket with hot water is a problem.

Charles

 

[cparcell]

im not the best with electrical understanding but if i get a 1kva buck booster that should raise it to around 263v in my simple understanding. i have seen some used units on ebay for 40-50 bucks. if i can get 100 degree water for my sink with out boosting i would be satisfied.

 

[Plump]

Not a super technical item for help, nor do I know where you live but...

make sure to purge the water in winter if you get freezing temperatures. My buddies needed to be replaced after his first winter. Oops.

 

[aardquark]

Just a caution with tankless water heaters if you are thinking about

1. Using a glycol-based system for freeze protection
2. not keeping the system warm all winter

Upon careful reading of the operating conditions for a number of tankless systems, every one I looked at required a minimum pressure to operate. The assumption was that the system would always be hooked up to a domestic water supply and pressure reducer, for replenishing at about 7 psi. For me, this was a deal-breaker, because did not want any incoming water connection, to avoid the danger of it freezing when I let the garage go cold. Maybe there is some slick way to get around that, but I chose to defer using radiant heat until some time in the future when I am sure I want to use it ALL winter long.

 

[cparcell]

I live in southern ohio and although we do have freezing conditions I'm going to regulate the shop above freezing all year. 45-50 degrees constant. My water supply there now has never frozen in the garage even after extended low teens. I have Well but my pressures are constant and regulated.