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  • Currently fitting an MVHR as part of an ongoing victorian renovation, so whatever we want it to be (between 50 and 65 would be fine, 40 feels too dry, etc).

    Trying to airtight seal the envelope of an older house is proving interesting.

  • Trying to airtight seal the envelope of an older house is proving interesting.

    Can imagine. Doesn't strike me as worth it for any building, let alone Victorian tbh, but then I guess you are using the MVHR to put some ventilation back?

  • Yep, continuous background ventilation with 98% heat retained. No need to punch holes in the external walls (100mm PIR).

    We'll be well beyond the performance of an average new build at around £1k materials and many days of faffing! Should pay for itself in ~2 years.

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