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Posted by HeatPro on April 30, 2008 at 10:18:26:
In Reply to: Re: W-M CGs vs GV vs Burnham Revolution vs SCG (Long post , many ?) posted by PS on April 30, 2008 at 09:15:26:
"standard atmospheric boilers are obsolete."
That is an opinion of people outside of Alaska; but you've given good reasons for using them there, and there are more.
A. You want the dependability of a standing pilot, perhaps even the independence of a powerpile to be sure there is fire in minus temperatures.
B. The drift of heat up the chimney keeps the ice off the top.
C. When the heat from the jacket is used to heat a space (in your instance, the garage) there is no standby loss other than the chimney loss.
D. There is no recourse when the electronic board or someone unfamiliar with ignition sensor cleaning to call for help before the owner is required to blow the lines clear of water to prevent bursting inside the house.
You give a hint of something to work on:
"he current system short cycles ruthlessly most of the fall and spring, and undoubtedly from what I gather from local contractors and reading here an outdoor reset would probably net me impressive gains in and of itself, but I do have concern for how cool I could run the return anyway "
In a properly designed piping system, the return water to the boiler should be no greater than 20 degrees cooler coming back, so there is no problem of shock. You appear to have that problem, so you can look into pumps or pipe redesign to eliminate the problem. Your boiler stays at 180F and cycles quickly as the radiation can't give off the heat of the boiler due to inadequate flow. A Beckett HeatManager would eliminate some of the problem when the flow is fixed.
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