I've asked three of the local Licensed and Insured
Professional HVAC companies here and gotten an
"err, umm, well.." response from them. Hence my
post here to anyone still around.
The situation is that we've got a boiler (Lochinvar,
if that matters..) that we installed about five years
ago, replacing the old one and saving us plenty thanks
to its much higher efficiency.
However, we've run into a problem (not directly
related to the boiler).
One heating zone goes to a bathroom in the garage (the
rest of the garage is unheated). We're in a _cold_
zone and what happened last year (20 degrees F below zero..)
The house is well insulated. The garage isn't.
So the house got to 70 degrees and the thermostat
shut off the boiler and the water pump.
It took (numbers made up here) an hour before the
house dropped two degrees and the thermostat kicked
back on. However, the garage, bathroom, and the
heating loop there... froze a _lot_
This led to the pipe in the garage bathroom freezing
and cracking, and we know the rest of that story.
(Fortunately not tooooo much water damage).
Anyway, our plumber replaced that whole section
of pipe with a brand new SlantFin segment.
The Licensed and Insured company suggested one
way to prevent this in the future was to
replace the water in the loop with..
--- ANTIFREEZE ---
Simple enough and makes sense. But then I asked the
question that stumped him and two other local groups:
Is the antifreeze solution less effective at heat transfer,
and if so, will this mean we'll be burning more fuel?
About two decades ago I spec'ed out a water cooled
air conditioning system. (This was going to be inside
a completely inaccessable interior room, so the only
plausable way to cool it down was with a water cooled unit).
The spec sheets described the various options, but since
we couldn't use a "once through" we looked at the
various outdoor radiator cooling choices.
The info sheets had the various figures, BUT said that
if using antifreeze, to derate the numbers by ten percent.
So... anyone know if this is still the case today, and
if we'd have to make allowances for a hot water boiler?
Knowledge may be power, but communications is the key
[to foil spammers, my address has been double rot-13 encoded]