HughF Posted July 13, 2023 Share Posted July 13, 2023 I thought that this list would be of benefit to the group, it's a summary of my most recent research on the dMVHR issue... Simultaneous supply and extract: Partel lunos eGo - https://www.partel.co.uk/product/lunos-ego/ Blauberg de-carbon freshpoint - https://www.blauberg.co.uk/en/de-carbon-freshpoint-pro-single-room-heat-recovery-ventilator Ecostream Prana - https://ecostream.org.uk/products/ Mitsubishi Lossnay V100 - https://www.bpcventilation.com/mitsubishi-v100u5-e?gclid=CjwKCAjwwb6lBhBJEiwAbuVUSksRORhtqn2lgkCad84gXTJFrMHPc_UPzfaVmkRKVTfdA-Xm4jVx5RoC-FkQAvD_BwE Reversing (may/may not be installed in pairs/interconnected): Partel lunos e2 - https://www.partel.co.uk/product/lunos-e/ Blauberg Aeris mini/midi, Vento mini/midi - https://www.blauberg.co.uk/en/blauberg-uk-mvhr-heat-recovery-ventilation-range/decentralised-single-room-heat-recovery-ventilation-units VentAxia Vent-Axia Lo-Carbon Heat Save - https://www.vent-axia.com/range/decentralised-mechanical-ventilation-heat-recovery Generic sub £400 units from eBay - https://www.ebay.co.uk/itm/193033436176?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=fRODC-NSQ2C&sssrc=2047675&ssuid=E-qQEBUERQS&widget_ver=artemis&media=COPY https://www.ebay.co.uk/itm/404354305089?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=rdzqkat2s6i&sssrc=2047675&ssuid=E-qQEBUERQS&var=674284052403&widget_ver=artemis&media=COPY I'm really not sure which units are the best, and what you should buy... But I hope that list is helpful. 1 1 Link to comment Share on other sites More sharing options...
JohnMo Posted July 13, 2023 Share Posted July 13, 2023 I would analysis the noise, I bought a dMEV fan said it was super quite, but had to replace it. The one I bought next was 20 dBa quieter. Basically you have to take the cover off to see if it's running. Link to comment Share on other sites More sharing options...
JohnMo Posted July 13, 2023 Share Posted July 13, 2023 The Prana were on the top my shortlist for our build. But the cost got too expensive as I need too many for a new build. Link to comment Share on other sites More sharing options...
Iceverge Posted July 13, 2023 Share Posted July 13, 2023 @JohnMo what did you use in the end? Link to comment Share on other sites More sharing options...
JohnMo Posted July 13, 2023 Share Posted July 13, 2023 For the house, we use Titon HRV units X2. For our garden room dMEV I used Greenwood CV2GIP. 1 Link to comment Share on other sites More sharing options...
HughF Posted July 13, 2023 Author Share Posted July 13, 2023 An interesting discussion about the Lunos... Not sure how relevant it is, but it's an interesting video nonetheless. Link to comment Share on other sites More sharing options...
HughF Posted July 13, 2023 Author Share Posted July 13, 2023 1 hour ago, JohnMo said: For our garden room dMEV I used Greenwood CV2GIP. The more I look at the Greenwood CV2 range, the more I think we need one in our bathroom (we don't have anything at the moment and are about to do a bathroom renovation). Is it possible to vent these through the roof, into the loft, then out through the sofit/fascia? Or is through-the-wall preferred? I would look at the 24v option because bathroom.... Link to comment Share on other sites More sharing options...
HughF Posted July 13, 2023 Author Share Posted July 13, 2023 To add to the original list, under the Reversing (may/may not be installed in pairs/interconnected): BSK Zephyr - https://www.bpcventilation.com/bsk-zephyr-single-room-heat-recovery-unit#accordion This looks really nice, and appears to be a premium product at a not-so premium price. Link to comment Share on other sites More sharing options...
JohnMo Posted July 13, 2023 Share Posted July 13, 2023 23 minutes ago, HughF said: The more I look at the Greenwood CV2 range, the more I think we need one in our bathroom (we don't have anything at the moment and are about to do a bathroom renovation). Is it possible to vent these through the roof, into the loft, then out through the sofit/fascia? Or is through-the-wall preferred? I would look at the 24v option because bathroom.... I believe they can be ducted they have a 24v version also. I got mine from eBay for £55. 1 Link to comment Share on other sites More sharing options...
TonyT Posted July 13, 2023 Share Posted July 13, 2023 I’ve fitted these before and can confirm they can be ceiling mounted and ducted away 1 Link to comment Share on other sites More sharing options...
HughF Posted July 19, 2023 Author Share Posted July 19, 2023 (edited) https://www.airtechsolutions.co.uk/no-recovery-from-the-cost-of-single-room-ventilation-systems Discuss... Edited July 19, 2023 by HughF Link to comment Share on other sites More sharing options...
JohnMo Posted July 19, 2023 Share Posted July 19, 2023 The thing I don't like about these reviews they are anonymous. Some of the test results show better performance on fan speed 2 than on fan speed 1, some the other way around. So some consistency of testing may not there. So he's getting 60+ efficiency,mostly above that and at one 81% - data sheet for the mini states up to 84% efficiency. Link to comment Share on other sites More sharing options...
HughF Posted July 19, 2023 Author Share Posted July 19, 2023 I went with humidity controlled trickle vents in the end, ordered 5 of them today. I'll replace the ones the vents that come supplied with the windows (on the windows that I fitted them to, the upstairs bedrooms), and retrofit one to each window in the extension. Whether I'll regret that decision, who knows.... But the only spot I could put a dMVHR unit would be facing the prevailing wind, and we’re in a hi wind speed area so was concerned by that aspect of the strategy. Link to comment Share on other sites More sharing options...
JohnMo Posted July 19, 2023 Share Posted July 19, 2023 At least their passive in operation and if the internal humidity is low they will close. Link to comment Share on other sites More sharing options...
HughF Posted August 3, 2023 Author Share Posted August 3, 2023 (edited) "Yes the Ego is an ideal unit for heat recovery within a wet room. This unit is only really suitable for a wet room as it does have an automatic boost mode which can be loud (noise similar to an extract unit). This would not be a suitable unit for habitable rooms such as bedrooms. The E260 is the unit suitable for bedrooms, this unit works in pairs. As an example; with one unit in Bedroom 1 and the other unit in Bedroom 2 they alternate between supply and extract every 70 seconds. They use a centrally located controller. The Ego is priced at €1,311.18 inc VAT. (This price includes the Ego unit, duct pipe, controller, transformer, internal and external grills) The E260 pair is priced at €2,063.94 inc VAT. (This price includes 2 E260 units, 2 duct pipes, 1 controller, 1 transformer, and 2 internal and 2 external grills)." "Oh I understand now. Unfortunately, we don’t have a heat recovery unit that would work on its own bar the NexxT unit. But the Nexxt is a large unit at 500mm x 500mm. The Ego is more suitable for wet rooms. There is a Silvento unit (also more suitable for wet room areas)… and would be extract only and not heat recovery." Some relevance to this thread, so posted it here. This was a discussion I had over email with Partel this week. Edited August 3, 2023 by HughF Link to comment Share on other sites More sharing options...
JohnMo Posted August 3, 2023 Share Posted August 3, 2023 Some discussion here also https://www.greenbuildingadvisor.com/question/lunos-e2-hrv-and-lunos-e-go-hrv-fans Link to comment Share on other sites More sharing options...
HughF Posted August 16, 2023 Author Share Posted August 16, 2023 (edited) To add to the list: Vent-Axia LoCarbin tempra - has simultaneous supply and extract yet fits into a 100mm hole. Edited August 16, 2023 by HughF Link to comment Share on other sites More sharing options...
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