timhowes

Thanks both. I shall continue in the same vein. @JohnMo I have read your many supportive posts regarding the Greenwood (made by Zehnder) fans and have earmarked these, plus some inlets you've recommended. Extremely helpful!

Noob here - please be patient! We are renovating an already-modernised 1949 rendered brick construction bungalow, adding 4 bedrooms and a bathroom upstairs. Timber construction first floor. Cold tiled roof. New windows. Major job. We had originally hoped to install MVHR, but I doubt we will be better than 3m3/m2.h - however, I have no idea really and this is purely guesswork. We aren't enveloping in a membrane and don't have PH ambitions (though will be generally attentive to minimising leaks). My latest plan is dMEV with humidity-actuated wall inlets, which will save money and, I imagine, perform adequately given the likely level of air-tightness. Our builder has suggested we can't assess this until the build has got to a point at which it can actually be measured - however, at this point I imagine it would be very difficult/impossible to re-design for MVHR if we found we were better than expected. I suspect dMEV is the best option, but please contribute if you think I've got this wrong! Many thanks

How noisy are these Aquarea fan coil units? Considering them for heating and summer cooling in bedrooms but the occupants won't appreciate anything more than a whisper!

Thanks both, very helpful

Thanks. I did search for such but can't find any - can you suggest any examples please?

Very timely thread as we are probably switching our plans away from MVHR and instead towards dMEV. We will most likely want humidity-activated through-wall inlets rather than trickle vents. Does anyone have testimonials regarding the external noise transmission with these, please? Hoping not to be woken up with the birds (acknowledging that there are far worse things by which to be woken!)

Thanks all - really helpful detail which has armed me with the necessary info to progress. No doubt I'll be back for more help... Cheers!

Excellent, thanks all. Final question (until another occurs to me): Since it appears I can do all this for < £7.5k, assuming I meet the MCS criteria do I still get £7.5k back from Mrs Reeves?

Thanks again, really helpful Using https://www.theheatpumpwarehouse.co.uk/mcs-air-source-heat-pumps-guide/ for info (and as a potential source of hardware), is the process as described below? i.e. - MCS-certified assessment of heating needs - Installation and certification by MCS-certified installer The problem I've got is falling at the first hurdle: getting assessment by MCS-certified installer seems invariably to result in excessively powerful and expensive hardware being advised (?inflated given BUS grant). How do I find an MCS-certified installer who is happy to install but not supply?! [From Heat Pump Warehouse webby] Steps in the Installation Process Consultation and Assessment: Before installation, an MCS certified installer will assess your property’s heating needs to recommend the best system. Installation: The heat pump is installed according to MCS standards, ensuring that everything is in compliance with regulations. Certification: Once the installation is complete, the installer will register the heat pump with the MCS scheme, and you will receive a certificate of compliance.

Thank you both for rapid and helpful replies. @JohnMo "Things to watch out for" - meaning these would exempt me from grant? What's the relevance of the buffer?

Hi all Great resource - I have enjoyed reading these forums over the past few weeks and have learned a lot. First post so please be patient (I've used the search function!) We are planning a renovation and have got to the point where we are settled on converting from oil combi/rads to UFH downstairs fed by ASHP. Will be some solar PV as well. I've had "help" from a few firms who plan and install greener heating systems and are MCS certified so will "save" me £7500 using the BUS. The trouble is their prices are super inflated, often justified by over-speccing. I can source all the kit I need more economically, and our chosen builders will be able to fit (not savvy enough / not enough time to do DIY), What are peoples' experiences with / approaches to getting the BUS grant in this situation? Choose an MCS-certified contractor to acquire the kit from my chosen sources at zero VAT, then pay them back, pay the labour and claim the grant? Suspect it's not that simple. Thanks for any advice you can offer. Tim