Has anyone out there determined any useful mechanical aids appropriate to the above task? Getting the Unit from the van to the kitchen is straightforward enough via a barrow, however these boilers are HEAVY and are routinely installed in cramped cupboards, above kitchen worktops etc. involving significant risk. Thanks in anticipation.

I used to work for a well known domestic boiler manufacturer and had occasion to conduct a manual handling assessment on installing boilers at trade counter exhibitions. As you point out some of these domestic boilers can weigh up to 70kg. My advice at the time was to source a mechanical lift the was collapsible and would fit in a car boot. These were approx £1k at the time (circa 2005) so it never happened. In the end they resorted to requesting help from the store owners, obviously not an option for sole traders and engineers installing boilers on their own. If I can find the details I will send them by private message.

Cheers Max, it's always good to know that your problem is a shared one! Thanks pl 53 - I'll have a look at that catalogue. Comments, suggestions and solutions still welcome!