Ending first fix on our build, nearly finished plastering. We got the heat pump up and running yesterday to help dry out, a bit nervous as we plumber and I never fitted one before. Set  a conservative direct flow (weather comp off) target of 25c as we dont want to cook the plaster too fast.  15 hours later and its looking good, delta T is 4c, its maintaining the slab at  25C giving a COP of 6.3. The actual room temperature is around 16 but that is with no loft insulation, no loft hatch and 52 downlight holes open to loft.

 

Have the eddi to commission later along with 2 x 300L cylinders as we have 5kw solar to exploit.

 

Not sure how to setup the DHW, may just leave the solar to run the immersions ?

 

 

got down to -2c last night, still have no loft insulation. Heat pump delta T has dropped to 3.  Still running it in direct mode 25c. downstairs is around 18c ambient upstairs 8. 

 

Don't think will need anywhere near 35c flow temp once upstairs is insulated and sealed.

 

 

 

Edited March 3, 20242 yr by Dave Jones

Looking good. Nice to see it's able to run constantly at 25 degs.