Air Source Heat Pumps (ASHP)

1250 topics in this forum

1. Heat pump plumbing thumps on change over from heating water to heating the UFH.

   By MikeSharp01, January 27
   • 15 replies
   • 1.3k views
   • 
   • Nickfromwales
   • January 28

2. I’m spending a fortune running a heat pump in my build! Please HELP 😫 1 2 3 4 5

   By damspt, November 21, 2025
   • 122 replies
   • 12.1k views
   • 
   • Nickfromwales
   • January 28

3. ASHP low pressure help pls 1 2 3 4 7

   By canalsiderenovation, January 8
   • 154 replies
   • 9.9k views
   • 
   • Nickfromwales
   • January 24

4. Pipe insulation for ashp

   By JeffGiraf, January 5
   • 3 replies
   • 839 views
   • 
   • Nick Laslett
   • January 20

5. r290 mini split/A2A 1 2

   By HughF, June 21, 2023
   • 32 replies
   • 8.4k views
   • 
   • Amarshe
   • January 18

6. Buffer tank and secondary pumps. Do I need them? 1 2 3

   By jimseng, December 24, 2025
   • 50 replies
   • 5.1k views
   • 
   • jimseng
   • January 10

7. Air to Air Heat Pump Operation - Constant or Timed?

   By mike2016, January 9
   • 1 reply
   • 795 views
   • 
   • JohnMo
   • January 9

8. Criticisms please 1 2

   By waxingsatirical, October 1, 2024
   • 41 replies
   • 6.3k views
   • 
   • MPH243
   • January 8

9. Weather test happening in the UK on ASHP design and installations. 1 2

   By Marvin, January 6   

   • ashp
   • design
   • 26 replies
   • 2k views
   • 
   • Michael_S
   • January 7

10. UFH = 46 deg? (Which comes first, ASHP or UFH / chicken & egg?)

    By Great_scot_selfbuild, January 6
    • 8 replies
    • 924 views
    • 
    • JohnMo
    • January 7

11. Should I or Shouldn't I ASHP? 1 2

    By Johnnyt, January 1
    • 48 replies
    • 3.2k views
    • 
    • DamonHD
    • January 6

12. Samsung gen 5 wired controller help

    By Bigspanners, January 6
    • 0 replies
    • 662 views
    • 
    • Bigspanners
    • January 6

13. Grant/ Aerona ASHP expensive... 1 2

    By JeffGiraf, January 4
    • 30 replies
    • 1.8k views
    • 
    • Michael_S
    • January 6

14. Ecodan system HW override

    By athlonoc, January 3
    • 8 replies
    • 693 views
    • 
    • athlonoc
    • January 3

15. Best electric tariff now that OVO are ending the Heat Pump Plus in February 2026

    By martian, December 29, 2025
    • 5 replies
    • 1.1k views
    • 
    • ectoplasmosis
    • January 2

16. Defrost calculation and impact on output

    By JohnMo, December 30, 2025   

    • ashp
    • defrost
    • 2 replies
    • 554 views
    • 
    • JohnMo
    • December 30, 2025

17. ASHP temperature settings query.

    By Marvin, December 27, 2025   

    • ashp operation
    • 4 replies
    • 705 views
    • 
    • Marvin
    • December 29, 2025

18. Help please. clear alarm?

    By Post and beam, December 21, 2025
    • 7 replies
    • 788 views
    • 
    • Nickfromwales
    • December 21, 2025

19. LG Therma V Monobloc – CH014 Flow Error (Heating Only)

    By Willits, December 18, 2025
    • 8 replies
    • 809 views
    • 
    • Willits
    • December 20, 2025

20. Sense check for ASHP & UFH design

    By timhowes, December 12, 2025
    • 24 replies
    • 1.7k views
    • 
    • Dan F
    • December 16, 2025

21. Extra output coil for UVC

    By LaChab, December 15, 2025
    • 7 replies
    • 732 views
    • 
    • SimonD
    • December 15, 2025

22. Flow rate needed 1 2 3 4 6

    By jamesdiyer, October 15, 2025
    • 128 replies
    • 10k views
    • 
    • jamesdiyer
    • December 15, 2025

23. Crunch time for heat pump size 1 2

    By SBMS, December 9, 2025
    • 44 replies
    • 3.1k views
    • 
    • sharpener
    • December 14, 2025

24. Anybody using Eon NextDrive Tariff ?

    By mk1_man, November 15, 2024
    • 7 replies
    • 1.8k views
    • 
    • Michael_S
    • December 12, 2025

25. Ecodan Fixed Flow Mode - Exceeding Flow Temp Setting

    By BadgerBadger, December 8, 2025
    • 2 replies
    • 637 views
    • 
    • JohnMo
    • December 12, 2025