Editing Heat recovery ventilation (section)

==Issues==
Between 2009 and 2013, some 15,000 brand new social homes were built in the UK with NIBE EAHPs used as primary heating. Owners and housing association tenants reported crippling electric bills.<ref>{{Cite news |date=2012-09-10 |title='Efficient' heating system left families with big bills |language=en-GB |work=BBC News |url=https://www.bbc.com/news/business-19511637 |access-date=2022-10-23}}</ref><ref>{{Citation |title=NIBE on Rip Off Britain | date=10 September 2012 |url=https://www.youtube.com/watch?v=DJr_oPXRYl0 |language=en |access-date=2022-10-23}}</ref> High running costs are usual with exhaust air heat pumps and should be expected, due to the very small [[heat recovery]] with these units. Typically the ventilation air stream is around 31 litres per second and the heat recovery is 750W and no more.
All additional heat necessary to provide heating and hot water is from electricity, either compressor electrical input or immersion heater.
At outside temperatures below 0 degrees Celsius, this type of heat pump removes more heat from a home than it supplies. Over a year around 60% of the energy input to a property with an exhaust air heat pump will be from electricity.<ref>{{cite web|url=https://www.bbc.co.uk/news/business-19511637 |title='Efficient' heating system left families with big bills |publisher=BBC News online |accessdate=21 Nov 2012 | date=10 Sep 2012}}</ref>

Many families are still battling with developers to have their EAHP systems replaced with more reliable and efficient heating, noting the success of residents in Coventry.<ref>{{cite web|url=http://www.coventrytelegraph.net/news/coventry-news/victory-tile-hilll-coventry-estate-4034696 |title=Victory for neighbours on Tile Hill estate in campaign to have boilers removed |publisher=Coventry Telegraph |accessdate=31 May 2013 | date=31 May 2013}}</ref>