Water for Boiler

[testlight]

Maybe you should ask the good people at "Real Goods" They sell all that solar, PV stuff, they would know, or at least have some suggestions

 

[ant]

did a little looking around and found this stuff:

cryo-tek February 2007 TM
ANTI-FREEZE for heating and cooling systems

http://www.herchem.com/specs/cryoteck.pdf

rather expensive and you will need to use a jet pump, as stated above, to get it in the system. i believe you have to drain all the water out and fill it completely with this stuff.

ouch.

stuff wont work in a central boiler.. see below

Standard cryo-tek products should not be
used in systems containing aluminum and operating above 160°F/71°C. Cryo-tek -100/AL is available for
aluminum systems. Cryo-tek should not be used in systems with galvanized piping as the zinc coating
will be dissolved.