Air Source Heat Pumps (ASHP)

1245 topics in this forum

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

   By jimseng, December 24, 2025
   • 50 replies
   • 4.5k views
   • 
   • jimseng
   • January 10

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

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

3. Criticisms please 1 2

   By waxingsatirical, October 1, 2024
   • 41 replies
   • 5.8k views
   • 
   • MPH243
   • January 8

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

   By Marvin, January 6   

   • ashp
   • design
   • 26 replies
   • 1.7k views
   • 
   • Michael_S
   • January 7

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

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

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

   By Johnnyt, January 1
   • 48 replies
   • 2.7k views
   • 
   • DamonHD
   • January 6

7. Samsung gen 5 wired controller help

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

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

   By JeffGiraf, January 4
   • 30 replies
   • 1.4k views
   • 
   • Michael_S
   • January 6

9. Ecodan system HW override

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

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

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

11. Defrost calculation and impact on output

    By JohnMo, December 30, 2025   

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

12. ASHP temperature settings query.

    By Marvin, December 27, 2025   

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

13. Help please. clear alarm?

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

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

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

15. Sense check for ASHP & UFH design

    By timhowes, December 12, 2025
    • 24 replies
    • 1.4k views
    • 
    • Dan F
    • December 16, 2025

16. Extra output coil for UVC

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

17. Flow rate needed 1 2 3 4 6

    By jamesdiyer, October 15, 2025
    • 128 replies
    • 8.7k views
    • 
    • jamesdiyer
    • December 15, 2025

18. Crunch time for heat pump size 1 2

    By SBMS, December 9, 2025
    • 44 replies
    • 2.7k views
    • 
    • sharpener
    • December 14, 2025

19. Anybody using Eon NextDrive Tariff ?

    By mk1_man, November 15, 2024
    • 7 replies
    • 1.7k views
    • 
    • Michael_S
    • December 12, 2025

20. Ecodan Fixed Flow Mode - Exceeding Flow Temp Setting

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

21. Sudden pressure loss in ASHP system

    By kandgmitchell, December 4, 2025
    • 7 replies
    • 871 views
    • 
    • JohnMo
    • December 6, 2025

22. Is this a common Vaillant problem?

    By Post and beam, December 2, 2025
    • 19 replies
    • 1.4k views
    • 
    • JohnMo
    • December 5, 2025

23. Samsung/Gen6 plumbed boiler (ASHP)

    By Paul16461, December 5, 2025
    • 2 replies
    • 778 views
    • 
    • jack
    • December 5, 2025

24. Looks like the party is over.... 1 2 3 4 17

    By Beelbeebub, November 14, 2025
    • 418 replies
    • 24.6k views
    • 
    • Beelbeebub
    • December 4, 2025

25. Fill and Flush valve

    By Potatoman, December 1, 2025
    • 3 replies
    • 600 views
    • 
    • SimonD
    • December 3, 2025