Eastfield

Agree with all of this 👍

Thanks for the tip Iceverge. Point taken re holes in the wall, but surely there are ways to mitigate wind ingress?…..

Conversely I started out convinced that it was for us, but now think otherwise. I don’t think the case is as binary as you suggest, in that I imagine it is possible to create a system which is highly controlled but without the heat recovery. I just need someone to help me design it for our home….

Granted, but I’m doing it myself, and will make sure it is…..

Ah..... the voice of reason. Our house is a new build so by virtue will be exceptionally well insulated and airtight. we have a 'cheap' source of heating. It's all very well those with MVHR stating they'd never live in a house without it, but have they lived in modern, well insulated home with well designed ventilation but no mvhr by comparison? I'd be keen to hear from anyone who has in order to gain an unbiased view. It's easy to disappear down a rabbit hole. Up until I watched the video in my first post I was dead set on MVHR. The concept makes complete sense, however I have been kept awake at night with the problems of routing ductwork, locating the unit and coming up with £5-6k to pay for it. I still need to find a decent company to give me some unbiased and impartial advice, any suggestions would be gratefully received. Thanks for all your responses. We may end up with MVHR yet, but all options will be explored....

Excuse my ignorance, but why do you need such a higher number of changes per hour with a non-heat recovery system?

I'm intrigued by your sub £2k system Bonner. Are you willing to share some details? Also, I couldn't agree more re trickle vents, and I do want to have full control of my ventilation. I don't want to compromise on health and comfort, ventilation is not optional. The point Jeremy is making, if I understand correctly, is that the heat saved by the MVHR is not substantial, and it would be more efficient to remove the stale air along with its heat, bring fresh air into the house and heat it via an economical heating method, which I believe I have in the biomass boiler.

Hi @Swampy, I wonder if you found any ventilation suppliers/consultants worth their salt? We're making progress with our 3 bed new build hempcrete house and need to make decisions on ventilation. We were sold on the idea of MVHR, but having watched the video below, where he suggests payback on MVHR is over 40 years, I'm beginning to have doubts. I'm certainly sold on the idea, but with the difficulty of routing ductwork, and the inconvenience of another washing machine sized unit in the utility room I'm now pretty keen to avoid it. our heating will be a log fired biomass boiler, with unlimited fuel supply, so heat will be fairly cheap. My hempcrete adviser doesn't think we need any forced ventilation at all, but we're not keen on trickle vents in the windows and I feel like we should put ourselves in a position where we have greater ability to control/automate our ventilation. Thoughts would be appreciated, as would any recommendations for an impartial adviser on all things ventilation.