Yes, I'm in exactly the same boat (although my house is even older - almost 70 years old). I hope to gradually replace the leaky windows and external doors (wo

Yes, I'm in exactly the same boat (although my house is even older - almost 70 years old). I hope to gradually replace the leaky windows and external doors (would love to put in double-insulated windows), maybe staple air barrier membrane under the floorboards after insulating under them to reduce leakyness there (I already have good insulation in the ceiling). But first I want an ERV just to increase general air quality.