Today I installed the Brine heat Exchanger in the intake Air of the HRV

Temperature inside house after Air passed through ground loop +9.1Celsius

After Brine loop heat exchanger +12.7 celsius

Measuring the intake Air of the Ground loop at -11.7 outside and + 9.1 inside  after going through the heat exchanger a further increase to + 12.7 Celsius this makes a difference of 24.4  degrees Celsius of free heat from the ground.

Temperature at outside Air intake

Therm image proof of Ground loop performance

Here is the proof in field testing of Ground loop free heat from intake ground loop to HRV

Outside air intake of HRV ground loop -2 degrees Celsius

Inside of House HRV ground loop temperature + 9,5 a difference of 11,5 degrees from out side air temp

Exhaust Air of HRV of stale air from House 9,6 degrees only 0,1 degree difference  from intake air

Installing Solar system with 500 liter Tank and Paul HRV from Germany

500 liter storage water tank with 2 heat exchanger coils and Electric backup Element 

Paul Novis 300 HRV

Top View of Paul HRV