Air Source Heat Pumps (ASHP)

1231 topics in this forum

1. ASHP schematic - Noddy question - CCT

   By crispy_wafer, 18 hours ago
   • 13 replies
   • 183 views
   • 
   • mistake_not
   • 9 hours ago

2. Vaillant ashp (my battle with). 1 2 3 4 23

   By zoothorn, August 27, 2023
   • 560 replies
   • 42.8k views
   • 
   • Dillsue
   • Sunday at 19:40

3. Nusku heat pumps - a less disruptive replacement for a combi-boiler.

   By LnP, Saturday at 21:06
   • 16 replies
   • 310 views
   • 
   • JohnMo
   • Sunday at 19:23

4. Prepping for ASHP and sizing - Heat loss calcs confusion 1 2 3

   By mistake_not, April 20
   • 62 replies
   • 1.5k views
   • 
   • JohnMo
   • Thursday at 18:41

5. Ashp, ufh and fancoils. Help!

   By lizzieuk1, April 21
   • 13 replies
   • 436 views
   • 
   • lizzieuk1
   • Wednesday at 21:44

6. Umbrella Route to Bus Grant?

   By Michael_S, Wednesday at 14:58
   • 1 reply
   • 130 views
   • 
   • JohnMo
   • Wednesday at 15:37

7. OpenHeatLoss - Free and Open source heat loss, system and pipe sizing tool, primarily for heat pump system design 1 2 3

   By SimonD, April 12
   • 57 replies
   • 1.7k views
   • 
   • SimonD
   • April 20

8. Quote for 7kw Vaillant - surely not enough? 1 2

   By Michael_S, April 15
   • 26 replies
   • 723 views
   • 
   • markc
   • April 20

9. ASHP - Weather Compensation AND Zoning?

   By SBMS, April 3, 2025
   • 10 replies
   • 1.7k views
   • 
   • DamonHD
   • April 16

10. Ducted AC - quick duct size calculator?

    By Alan Ambrose, April 11
    • 3 replies
    • 212 views
    • 
    • Nickfromwales
    • April 11

11. What do you think of the aira heat pump and the way of paying for it?

    By CalvinHobbes, March 13, 2024
    • 7 replies
    • 4.5k views
    • 
    • Rishard
    • March 30

12. Ecodan SIKA Flow sensor failure

    By joth, August 16, 2024
    • 17 replies
    • 5.1k views
    • 
    • JohnMo
    • March 30

13. Evan Davis's Heat Pump in the Home

    By SteamyTea, March 12
    • 1 reply
    • 429 views
    • 
    • SteamyTea
    • March 19

14. Which ASHP are set up to cool 1 2 3 4 13

    By Triassic, July 15, 2018
    • 310 replies
    • 83.4k views
    • 
    • JohnMo
    • March 19

15. Siting an ASHP when no wall space available?

    By Steve1309, March 15
    • 11 replies
    • 478 views
    • 
    • JohnMo
    • March 16

16. ASHP outdoor unit heating pump Q 1 2

    By BotusBuild, March 6   

    • vaillant
    • arotherm plus
    • (and 1 more)

      Tagged with:

      • vaillant
      • arotherm plus
      • vwl 75/6
    • 35 replies
    • 1.4k views
    • 
    • BotusBuild
    • March 10

17. Interesting couple of days with the new heat pump. 1 2

    By MikeSharp01, February 3
    • 49 replies
    • 2.9k views
    • 
    • Wil
    • February 25

18. ASHP BUS Grant - when does it pay out?

    By Great_scot_selfbuild, February 16
    • 8 replies
    • 649 views
    • 
    • Post and beam
    • February 20

19. Panasonic Aquarea L series cooling

    By Benpointer, February 17
    • 4 replies
    • 464 views
    • 
    • Benpointer
    • February 18

20. Why did you choose an air source heat pump? 1 2

    By SimonD, February 15
    • 32 replies
    • 1.5k views
    • 
    • BotusBuild
    • February 17

21. Whole house ASHP system design

    By flanagaj, February 15
    • 6 replies
    • 576 views
    • 
    • flanagaj
    • February 16

22. ASHP: monobloc, split or combi? 1 2

    By AndySat, January 20, 2025
    • 44 replies
    • 5.4k views
    • 
    • Wil
    • February 9

23. Any reasons not to go with a Nibe ASHP?

    By Great_scot_selfbuild, February 8
    • 9 replies
    • 641 views
    • 
    • JohnMo
    • February 9

24. 2x air source heat pumps - Scotland 1 2

    By BintyAndTheBeast, December 29, 2025   

    • heat pump
    • scotland
    • (and 2 more)

      Tagged with:

      • heat pump
      • scotland
      • planning application
      • noise
    • 25 replies
    • 799 views
    • 
    • JohnMo
    • February 8

25. ASHP - choices, choices. Feel like I’m back at square one 1 2 3

    By Great_scot_selfbuild, February 3
    • 60 replies
    • 3.1k views
    • 
    • Nickfromwales
    • February 8