mvhrishard

Hi, I'm considering a Mitsubishi Electric Lossnay Single Room MVHR for my home office, since I spent a lot of time in there, I notice the CO2 levels go up when all the windows are closed. There is no room for ducting for a central system. Just wondering if anyone has experience installing or using these units / if they're happy with them? There are other brands of d MVHR (single room MVHR) but most of them seem to be pairs that reverse every 30 seconds (so they take in air for 30s, then blow air out). I'm worried that a constant noise is a lot nicer than noise the keeps turning on and off, but if anyone has experience with other brands of dMVHR I'd also welcome your reviews. Best, jj

I'm in a 1960s concrete brick cavity wall house. I hope to have it clad with rockwool in future to improve insulation. CO2 levels get quite high when the windows are closed so I'd like to have MVHR with filtration. Upstairs (the bedrooms) its very easy to run ducting in the loft that can access each room (and vent to the outside). However, all the walls in the property are concrete so its very difficult to run anything downstairs (a lot electrical wiring etc has been done on the outside of the property for this reason). I'm wondering about having a central MVHR for upstairs and dMVHR (single room) for downstairs. Has anyone done anything like this? bpcventilation discouraged me from using MVHR if I can't reach every room and suggested PIV but then I'll loose a lot of heat in winter and also at night the bedroom doors will be closed. Any advice?