Browse Forums Heating, Cooling & Insulation Re: Completely air tight homes? 27Dec 23, 2011 1:07 am . Block settled 07 June 2011 Our little piece of the Interwebs on HomeOne....... viewtopic.php?f=31&t=48577&start=0 Re: Completely air tight homes? 34May 04, 2018 5:05 pm taththi Some good info here: http://www.greenbuildingadvisor.com/blo ... hrv-or-erv I see what you're saying, but in climates like mine and other zones where HRVs are used we don't really run into many issues. I recently asked our consultant about it and his reply was: consultant Energy Recovery Ventilators use an Enthalpy core which is like a fabric type of material (HRV uses aluminium plates) to transfer vapour to the incoming and outgoing air (depending on the climate), these are only generally used in cold climates or hot humid climates. Your area is classified as Cool/Temperate and a HRV core is recommended, these cores perform much better than ERV cores because energy is lost (up to 15%) with the transfer process of the vapour. I have attached some information on Mechanical Ventilation with Heat Recovery, note that Zender uses Counter Cross Flow Heat Exchanger Cores. The misty frosty conditions will not be an issue as generally this will be a cool damp condition and the incoming air will be heated, therefore reducing humidity as the air expands and can carry more vapour. Not exactly agree with your consultant. As ERV transfers moisture, it can also cool house by several degrees in summer by removing humidity from the outside air and, therefore, significantly reduce the load on an air conditioning system (which will certainly pay off this 15% efficiency difference during the heating season). In TAS it might be less of an issue, though. Re: Completely air tight homes? 36Dec 16, 2019 8:13 pm alexp79 3) I continued my research and found out that actually Mitsubishi ERVs (as well as LG, Systemair, Haldes, Hitachi ones) are manufactured for Mitsubishi by one company in China called Holtop (http://www.holtop.com/) and they also have their own enthalpy-based ERVs which not only perform very well, but also have options with built-in heat pump for the supply air. ... I have contacted the Chinese factory and they told me that they have distributor in Australia - a company called RecoveryVent (https://recoveryvent.com.au). Hi alexp79 Been a while since you posted the above so hoping you read this. What was the outcome of your investigations into the ERV and enquiries into the products made by Holtop? I'm aiming for a high level of air-tightness with a new house in Sydney so have been investigating HRVs/ERVs. I also explored Mitsubishi Lossnay but couldn't find a local installer interested in quoting installation in a house. Strange, because there is a market opportunity - in NZ they are promoted for residential applications with integration into aircon. You can wash over existing pavers with 10% solution of water and hydrochloric acid, then wash off. The acid will provide for required bond key with new concrete. 1 36949 How do you remove one of these ceiling air con vents? And is it possible to disconnect the duct joined to the vent from inside the house, without going into the roof cavity? 0 5900 Hi all, sorting out the ducted air con for a 350sqm double story house. Does this placement sound reasonable to you? Also, I plan to have 6 zones I think. Living room… 0 0 |