We've always been very pleased with the high standard of service you provide.
Just a note of thanks for all your hard work on our heating systems over the last couple of years.
I thought I would update you on how the solar thermal / PV and boiler that you fitted are performing.
Although we have a four-bedroom house, both electricity and gas bills have fallen considerably, and now compare very favourably to typical values for similar properties in the neighbourhood. Our usage of both gas and electricity has dropped considerably due to the highly efficient systems that were installed.
We have always been very pleased with the high standard of service that you provide. Many thanks once more!