The reason for the flat plate HX is: the buried 450’ loop of 1” pex is open to Oxygen permiation,
& the house heating system is closed O2 barrier pex.
The buried pipe can hold about 13.5 gallons so I need to put about 7 gallons of propylene glycol in it?
Some of it goes under a window well & is only about 16” below bottom, so cold Winter air could freeze it if no glycol.
I bought a Honeywell dew point controller & a line voltage cooling only thermostat.
I plan to pump the buried loop through the flat plate HX (rated at 50,000 BTU,s)
with a Grundfos SS Alpha ECM pump,
Under 10 Watts on low.
Last edited by buffalobillpatrick; 01-11-18 at 10:50 AM..
|