Had a domestic installation of Mitsubishi Ecodan air source heat pump to replace an old oil boiler, there is no gas here so looked for an alternative given fuel costs. This is a 1930s house - cavity wall insulated, increased loft insulation and double glazed in the 1990s. Of the several companies I contacted Ecovision were the most professional and knew what they were talking about. They gave lots of information, I had an excellent experience with the design stage. Found some companies had certain "offers" to entice you in. Ecovision charged £250 for the initial assessment and to be fair it was better that way to get a professional opinion. Am always wary of "free" advice. My intention was to go with a local installer, but Ecovision came in more competitively priced than the locals who also seemed to lack some experience and confidence, I also found some pressure selling from one of them. The same company also tried to oversize the system saying anything smaller wouldn't work. Their quote was very competitive including the replacement of the radiator system which was old and tired and needed some additional output with for the system. I wondered if the workmanship would be as good, but all I can say is I was astounded. The pump installation is very neat, and all the plumbing and electrics has been done to a first rate standard. Excellent quality products and radiators used. The installers went the extra mile to place all piping under floorboards. They rejected some radiators which were delivered blemished and returned another week to rectify, just keeping me informed.... I didn't even need to point anything out myself. Even a minor hiccup at the end of the install with the hot water program resulted in the installer coming back at 7am to sort it before I had to leave for work. Couldn't fault them and the system is excellent. House very warm and been monitoring the bill and its costing less than £3 a day to heat a reasonable sized property, even with some sub-zero days. I know I won't get the efficiencies that would be possible with a brand new build, but their advice along the way has made this project really worthwhile. Very glad I chose Ecovision, house is now comfortably warm all the time and plenty of hot water. Certainly chose the correct installer as it seemed to be a bit of a minefield. Would recommend to anyone as they can be trusted to tell you how it is.....