Hydronic heat when no is no water in the building.

Paul_26

I've got an artists studio going up that has no water in the building. I'd hate to put in warm air heating, but the no water thing is a problem. Any ideas?

Kent_3

use another expansion tank as a reservoir

Paul_26

How big (per sqft or per system volume) & how long between refills & repressurizations?

kevin coppinger_4

NO problem.......

how far away is a hose bibb? Or in worse case scenerio can you get 30,40 ,50 gallons to the site? Use a pony pump to purge /fill and /or Run the hose(s) from the hose to the boiler to fill/purge and them stick 1 or 2 Low water cutoffs on the boiler....I have done it as have others....no problem....kpc

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kevin coppinger_4

If it's a closed.....

system and all hot water heating system should be...there should be no need to repressureize, really.If there is a need to, more than once a year or so, you could very well have a leak...thats where the LWCO comes in.kpc

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Eric

LOOK AT AXIOM. SMALL PACKAGED AND 50 GALLON AUTOMATIC MAKEUP TANKS. VERY NICE PRODUCT. EVEN A SMALL 5-10 GALLON SIZE

Floyd_5

Thanks to ME....

I did this for a cabin that is not occupied for long periods of time....diferent reason, same result.

hr

Newly commissioned hydronic

systems will burp air for a few days, or more. Depending on how well you can purge it at initial fill.

You will need some additional make up water to replace purged air. If you have, and you should, a low water cut off switch, your system may shut down if the system burps air and does not have a refill system.

Is this temporary, or will the building never have a water supply? If never, I would look into an auto fill system like described, or an Axiom filler.

hot rod

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Mark Eatherton1

We do that on EVERY new job...

It's the only way we could get insurance. I'd also recommend a low pressure cut off in addition to the low water cut off.

Can't be too safe when you don't have a make up to fall back on...

ME

Jack, CVMS

No water in the building

What you describe is pretty much what we find in every boiler installation in that we almost never connect the domestic water system to the hydronic system.
In our part of the country, domestic water is always from a local well, and is full of minerals, so we bring in deionized water for the boiler fill. The only time we use well water is when we do a pre-flush with cleaners, and then we blow it all out (as much as possible) before filling with the DI/propylene glycol mix.
So long as there are no leaks in the system, and we have done a very thorough purging of air, pressure loss in a year's time is negligible. In an average house, a quart or two of make-up water after the first year of service will take care of bringing the pressure back up to 15 - 20 psi.
As other posts have advised, a LWCO is essential with such a system.