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Hi All, I am writing to see if there is a good way to add cooling to an existing MVHR system. I have read quite a few topics from this forum on this, but they don't exactly seem to answer the question, mostly because I live in a flat where a split system is not feasible: This thread has the most information concludes that an ASHP seems to be the best option, which is not possible. This thread hints that comfort cool is ineffective. This thread stops quite inconclusively and is quite focused on a house. Here is a discussion about summer bypass, but unfortunately the unit that came with my flat seems to be the cheapest and does NOT have a summer bypass (MRXBOX95-WM2) This thread went off the rails a bit but has some ideas. The flat has huge windows on both aspects. I have done what I can to reduce heat gain with reflective film on part of the windows and big curtains, but outside shades are not an option. The flat is very well insulated and is on the 4th floor, leading it to get quite warm at night even without hot weather. For example, I aired it out yesterday and went to bed with it being 22C, but woke up with it at 25C despite the outside temperature being 12C. I suspect the cheap MVHR is part of this, but the bathroom does not have windows so I don't have much choice but to keep it on all the time. I can't seem to get it off boost mode either. Why not just open the windows at night? Unfortunately, it is quite close to a very active train line, and I find it difficult to sleep with loud trains going by constantly. As far as I can tell, these are my options: Portable A/C Pros: Cheap Cons: Loud, ugly, inefficient especially because windows are only inward opening, have to open window Get water cooled A/C installed Pros: Effective Cons: Very expensive to have done, loss of most storage space in the flat, increased water bill (??) Adiabatic cooling on MVHR, such as https://www.ventilationland.co.uk/en_GB/p/homevap-mvrh-cooler/9745/#pdpBlogs Pros: Goes onto existing system, cheaper than water cooled A/C Cons: Very little info on effectiveness (could work moderately? not enough airflow?), unclear if there are many who install these MVHR system with cooling, such as https://www.nuaire.co.uk/product-list-page/mrxbox-hybrid-cooling-system Pros: Same ductwork Cons: Can't find any reviews on effectiveness or cost I know this forum is more focused on homes, but I would appreciate any thoughts any knowledgeable folks might have.

Hi I'm looking for advice from anyone that has a Itho (Heatrae Sadia) Hru Eco 4 fitted in their home? We moved into a property in 2018 with 2 units (dating from 2010), both were serviced last year but we recently noticed that the discharge fan in one of them is no longer running smoothly and as a result, creating more noise and subsequent lack of air flow through the ducts. We ordered a new fan but we have exactly the same issue - the fan sounds like it struggling to maintain a constant speed. Any thoughts? We're trying to find an engineer who can come and look at it at the moment but no luck so far! TIA

Hi, I have installed a Villavent mhvr system in my new build a few years back and it’s been running fine. I never got my final ticket, due to a lack of funds and had to just move in. I now desperately need my final ticket , so I can try to claim vat back. Do any of you clever people know the cheapest, easiest way for me to get a commissioning certificate passed on my system for building control. Im in Conwy, N.Wales. Appreciate and look forward to any help. Thanks Paul