richo106 Posted May 18, 2023 Share Posted May 18, 2023 Hi all (again - really not sure what I would do without this forum) Next week I am planning to start installing my MVHR in a cold loft, I am planning to install a MVHR house. A couple of concerns I have are regarding noise and where to have the ‘house’ My plan was to mount the unit and distribution box on a couple of floorboards screwed to the joists. But mount the MVHR on rubber feet…would this be enough to negate on noise transfer? I have attached a couple of pictures of what I am basing my install on…would it be best to have the distribution box in the insulated box too? Link to comment Share on other sites More sharing options...
RobLe Posted May 18, 2023 Share Posted May 18, 2023 If your installing in a cold loft, then all the pipe runs from mvhr to house are at house temperature, and they should all be insulated just like the house is. We use short runs of (thinly) insulated flexible pipe from the mvhr unit down to solid uninsulated stuff that is buried under fluff. Our mvhr is mounted on the breezeblock gable end, you cant hear it. I think the key to keeping it quiet is generally keeping air speeds down - so either large diameter pipes, or lots of them. We have generally 150mm dia pipes and room vents, but just one per room generally. I used the same ‘tecsonic’ insulated flexible stuff to join to most room vents, and it works well - claims to be sound absorbant. Ithink it does work, as one room uses a semirigid joint to the room vent, and there’s a definite rumble out of that vent that I noticed (nobody else has mentioned it, could be I’m just super sensitive.. fix it one day, maybe) Link to comment Share on other sites More sharing options...
jfb Posted May 19, 2023 Share Posted May 19, 2023 Looks like a warm loft to me. I think you would be alright sitting the unit on top of some rubber as you suggest. That is what I did. Noise is more of an issue from the ducts than the machine but maybe that depends on different machines. Link to comment Share on other sites More sharing options...
Adsibob Posted May 19, 2023 Share Posted May 19, 2023 9 minutes ago, jfb said: Looks like a warm loft to me. The photo is not the OP’s. Link to comment Share on other sites More sharing options...
jfb Posted May 19, 2023 Share Posted May 19, 2023 3 hours ago, Adsibob said: The photo is not the OP’s. True! My bad Link to comment Share on other sites More sharing options...
Marvin Posted May 19, 2023 Share Posted May 19, 2023 We lifted the thermal envelope over our MVHR pipes. We found that the heat recovery side is less able to hold the building temperature in the summer/ winter without it. This is on top of the Domus insulation directly to the pipes.... Link to comment Share on other sites More sharing options...
JonBATConsult Posted May 23, 2023 Share Posted May 23, 2023 Hi, happy to give you a little bit of a guide. What unit are you using? Link to comment Share on other sites More sharing options...
richo106 Posted May 23, 2023 Author Share Posted May 23, 2023 1 hour ago, JonBATConsult said: Hi, happy to give you a little bit of a guide. What unit are you using? Vent Axia Sentinel Kinetic High Flow Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now