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What type of tankless? gas? in a boiler? do you have the tankless now? if not how do you currently heat water?
I just have the solar system. I am now needing to incorporate something that works in propane to substantiate the heat. I would like to be a tankless. is it possible.It kind of needs to be a closed loop system
Is this for DHW or space heating? what do you currently have for back up?
OK What I have is a solar system.It does Domestic Hot water and heating. I have no back up . I want my back up to be a tankless hot water system. Now I am in HVAC business myself. I was looking for some one there that has actully done this. Or tell me that its not possible
What type of radiation do you have in the heating system? what is space heating water design temp?
Its a coil in furnace.
Ok so no system design temp you're just using the excess heat from the solar to supplement/override furnace (gas?) operation? Sorry about all the questions but I need this info to make a recommendation.
The only problem is that you are asking me the wrong questions as I said I am a heating contractor too. All I want to know is if I can use a tankless hotwater tank like a Bosch to heat water in solar. tanks to about 140dg. If so can you recommend a piping diagram. See in my mind I need a tankless hot water that can take in at least 140dg water. I dont know of any tankless other then a boiler
You may think they're the wrong questions but unless I have a complete picture of what you're trying to do I can't make an informed recommendation. That said if all you want to know is; are there any tankless water heaters that will tolerate inlet water higher than 140 the answer is no. Since you mention Bosch I assume you've looked at the specs and at their piping diagram for a DHW & space heating system. Personally I'd never use a water heater for space heating whatever the config. You may have noticed that the warranty drops way off if you use a Bosch (or any tankless) for space heating. While water heaters are used for space heating it's usually a cheap way out for a spec builder. They don't last when used in this type of application
That is what I wanted to know. thanks