Installed into a large 1960’s house over the summer in Cambridge, Cernunnos Homes supplied and installed a 24 kW Baxi Ecogen boiler after the property had been deemed unsuitable for the use of an air source heat pump. The fabric of the home was to be improved with new windows and upgraded insulation however underfloor heating was not a possible solution. Without relying on fan assisted (or oversized) radiators a heat pump could not reliably heat the property.
The property owners however decided to make the not inconsiderable investment in a micro CHP boiler from Baxi – the Ecogen. A largely ignored technology adoption of micro CHP boilers in the domestic market had been rather disappointing but with the boiler costing perhaps 5 or 6 times the amount for a traditional gas boiler with the same output one can not be that surprised. We were then rather grateful that our client was willing to make an substantial investment on something that is really rather an unknown entity.
The house was not suitable for solar PV but the owner wanted to improve the house’s green credentials. However we have very little data (apart from the Baxi brochure) as to how much electricity these units produce. However the data seemed to show us that they are capable of producing between 12 and 18 kWh per day in November which was very impressive. With a well designed system you may be able to produce as much electricity (annually) as a 3kW PV system (with the additional costs of a micro CHP boiler over a standard boiler being less that the cost of a PV system).
So impressed were we by the system that one of our directors decided to take the plunge and invest in a CHP boiler of his own …. one that we can fully track and document the production of in the near future.