Hi. I'm a retired (10 years) electrical/electronics engineer and IT Lecturer with too much curiosity probably. I have a 1950's house with upgraded insulation and I'm looking to replace my combi boiler and get rid of gas. A Sunamp unit for hot water and an ASHP for heating are favoured, the idea being to use off peak electricity and installed solar PV to the maximum and minimise emissions etc. Green Home grant and RHI under investigation. Only a shallow knowledge of plumbing, heating and ventilation, so I'm on a steep learning curve. In my early 70s I'm having to get others to do things for me as my DIY capabilities decrease. Very frustrating!