Mechanical Ventilation with Heat Recovery (MVHR)

1180 topics in this forum

1. MVHR external vent placement?

   By Alan Ambrose, November 3, 2025
   • 16 replies
   • 1.2k views
   • 
   • Nickfromwales
   • November 15, 2025

2. MVHR options and layout for small flat

   By Bryn P, November 9, 2025
   • 5 replies
   • 913 views
   • 
   • Mike
   • November 14, 2025

3. MVHR Design Feedback

   By umiq88, November 12, 2025
   • 2 replies
   • 667 views
   • 
   • umiq88
   • November 12, 2025

4. Existing MVHR Unit Replacement

   By NOC, November 11, 2025
   • 3 replies
   • 631 views
   • 
   • MikeGrahamT21
   • November 12, 2025

5. Best looking MVHR valves?

   By Alan Ambrose, November 9, 2025
   • 10 replies
   • 984 views
   • 
   • Nickfromwales
   • November 10, 2025

6. Ubbink - what are they like? 1 2

   By lizzieuk1, October 28, 2025
   • 31 replies
   • 2k views
   • 
   • JohnMo
   • October 31, 2025

7. Control Units for NuAire MR ECOBOX3 and 5

   By mickeych, May 30, 2025
   • 2 replies
   • 972 views
   • 
   • Fadec
   • October 29, 2025

8. Extract & supply valve positions in vaulted rooms?

   By Alan Ambrose, October 28, 2025
   • 3 replies
   • 460 views
   • 
   • Kelvin
   • October 28, 2025

9. Komfovent Domekt R400V MVHR

   By Street654, October 26, 2025
   • 2 replies
   • 553 views
   • 
   • Mike
   • October 26, 2025

10. MVHR ducting to outside 1 2 3

    By Moira Niedzwiecka, March 5, 2018
    • 59 replies
    • 18.5k views
    • 
    • Nickfromwales
    • October 26, 2025

11. Complete Newbie

    By NBW, October 23, 2025
    • 5 replies
    • 637 views
    • 
    • JohnMo
    • October 24, 2025

12. Boost function tripping electrics.

    By Lmiln25, October 8, 2025
    • 20 replies
    • 1.1k views
    • 
    • ProDave
    • October 16, 2025

13. Ubbink- Blauberg compatibility ?

    By Post and beam, October 16, 2024
    • 9 replies
    • 1.7k views
    • 
    • Mike
    • October 15, 2025

14. Advice on MVHR (retrofitting, reducing Carbon Dioxide and Radon levels)

    By Kuro507, October 13, 2025
    • 3 replies
    • 535 views
    • 
    • Mike
    • October 13, 2025

15. External inlet/outlet into prevailing wind

    By gavztheouch, October 13, 2025
    • 2 replies
    • 468 views
    • 
    • Mike
    • October 13, 2025

16. Zehnder Q350 + ComfoPost CW12 1 2

    By BartW, January 4, 2023
    • 34 replies
    • 9.1k views
    • 
    • JohnMo
    • October 10, 2025

17. MVHR calculator

    By Mike, October 4, 2025   

    • mvhr design
    • mvhr calculator
    • (and 2 more)

      Tagged with:

      • mvhr design
      • mvhr calculator
      • mvhr spreadsheet
      • mvhr duct
    • 2 replies
    • 760 views
    • 
    • JohnMo
    • October 5, 2025

18. Intake and Exhaust Ducts

    By Mr Blobby, February 5, 2024
    • 13 replies
    • 3.6k views
    • 
    • Great_scot_selfbuild
    • September 27, 2025

19. Another "is my intake too close to the ASHP" question

    By Dunc, September 23, 2025
    • 23 replies
    • 2.2k views
    • 
    • Gus Potter
    • September 25, 2025

20. Rigid vs semi-rigid ducting for MVHR

    By Great_scot_selfbuild, September 14, 2025
    • 14 replies
    • 1.8k views
    • 
    • Nickfromwales
    • September 22, 2025

21. DOMUS HRX2 replacement fan unit and / or replacement MVHR unit

    By Steve W, February 14, 2024
    • 24 replies
    • 6.3k views
    • 
    • Marvin
    • September 21, 2025

22. Self installed Air Conditioner

    By Annker, July 1, 2025
    • 11 replies
    • 1.7k views
    • 
    • -rick-
    • September 5, 2025

23. MVHR plan questions

    By oliviaaa999, August 14, 2025
    • 7 replies
    • 1.4k views
    • 
    • JohnMo
    • August 20, 2025

24. MVHR duct route issues (Glulams in the way)

    By Smallholdertoo, August 16, 2025
    • 4 replies
    • 1k views
    • 
    • SteamyTea
    • August 17, 2025

25. Anyone fancy fitting my MVHR system?

    By Berkshire_selfbuild, August 16, 2025
    • 0 replies
    • 781 views
    • 
    • Berkshire_selfbuild
    • August 16, 2025