Hydro-air question: Jamie

Jamie_6

I would like to install a hot water coil in the attic of a house! Is this possible w/out worrying about the coil or lines freezing? If so how.

The only idea I have is to run the circ on that coil constant circ. And run the heat through the t-stats. fan control. Although, they can not have constant air circ. then.

HELP

DKH

I did this on a job due to the fact that the customer was over budget and did not want to purchase the antifreeze system .It was good for the first mild winter then the next bad winter the power went out and the coil and all related piping froze.In my opion no save way in New England or other cold climates

Bob Bona_4

I've used

the tekmar 150 control to cycle the circ only when the temp in the attic drops below setpoint. Works well. Customer should be advised about power outages however and weigh the risk. Otherwise, antifreeze, and all the maintenence headaches that come with it. Nothing will ruin a hydronic system faster than antifreeze corrosion. Disposal issues, service issues, etc.

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Mike T., Swampeast MO

Automatic Emergency Power Backup

They're not all that expensive--particularly for one sized to handle the boiler, air handler, and possibly the frige and an overhead lighting circuit. They have to be isolated so they don't try to back-feed into the entire system, but installation isn't too complex or expensive.

They come with their own maintenance issues, but less problematic than anti-freeze?

hr

Freeze stats

Any type of setpoint or strap on control could start the circ if the temperature fell below 32 degrees. Or a 12 volt back up pump and power source.

Other than that, I think drain back or glycol would be the only way to protect it in the event of prolonged electrical or fuel outages in freezing weather. Feel lucky?

hot rod

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