First testresults from the JAHUS

Progress:
Now that the ventilation system should be finished according to the subcontractor who is responsible for the this part of the project - I have run some tests on the system during the weekend (in preparation for the handover meeting on Tuesday).

The scenarios were as follows:

1) The system was running as the ventilation team had left it on Friday afternoon. This means pulling some hot air from the area near our heatpump - and mixing it with fresh/cold outside air before the "preheated" air entered the ventilation aggregate.

2) I then closed the supply of preheated air and let only the cold outside air enter the aggregate.









The testresults presented above are shown in degrees Celsius and show that switching off the supply of pre-heated air had a dramatic effect on the temperature of the air leaving the house, while only minimal effect on the temperature in the livingroom (and other parts of the house).

With the last setup the exchange of energy is more effective because there is a much bigger difference in temperature between the cold outside air and the hot exhaust air. To me this confirms my view - that the heated air should be mixed with the fresh air after the aggregate (with its rotating heat exchanger). We'll have to wait for Tuesday to hear why they insist on the design we have now.