Improving Energy Efficiency in Our Homes - Presentation from the 25th Oct meeting and other useful material

Posted on Oct 26, 2021

The Putney Society meeting on 25th October 2021, "Improving the Energy Efficiency of Our Homes" had two speakers,Toby Costin of CREW Energy* and David Nicolson**, a Putney Society member who has installed a heat pump at his home, followed by a Q&A session.

Toby Costin outlined the steps that can be taken to improve the energy efficiency of a home, ranging from the straightforward low cost e.g. installing LED light bulbs, to the complex and higher cost e.g. wall insulation and heatpumps. 

His presentation can be viewed by clicking here: CREW Energy Presentation

If you would like to learn more of the work of CREW Energy and the services the offer please visit the CREW Energy website at:

More details of the new Hydromx nanotechnology product which is used to improve the heat transfer within a closed-loop heating system such as a boiler and radiators can be found at:

David Nicholson described his experience of selecting and installing a heat pump in his Putney terraced home in April 2021.   He outlined how heat pumps operated and talked about things to think about before installing a unit.

Both speakers emphasised that heat pump technology could not be installed at present in all properties.  However the technology was moving rapidly towards providing better solutions. 

This was reflected in a question from the audience:  Heat pumps seem to be enormous - will everyone has the space to put them?   What about blocks of flats?   Toby answered:  "This is something we are looking at. One solution might be a hybrid system. A small heat pump and a back up gas boiler. The Heat Pump does 80% of space heating, maybe more in London. Gas does the hot water and really cold days. Its a good halfway solution."


* CREW Energy is a volunteer-led not-for-profit cooperative made up of south-west Londoners who care about making this corner of London a more resilient and sustainable community.

** David is the founder of River Gecko whose MyUrbanCar website provides information and advice about electric cars