I ordered a Testo 405i from CPC on Friday PM before Christmas Eve and it turned up today. That's what I call good service, I wasn't expecting it until the New Year. Had little play with it and it looks good. I decided to buy one rather than hire, as they're not very expensive. When I've finished the wet room door I'll have a go at balancing the ventilation. The Genvex seems to be doing a good job of keeping the house warm, and having the ventilation running has got rid of the paint fumes.