Amps this is why I stated he’s a family friend. Working in the electrical industry myself I know how lazy some tradesman can be, but I can definitely rely on him for solid advice. As I said, he’s had so many customers install them (even after advice), only for him to go back and uninstall them months down the line. Sure there are some goods stories out there too, but I wasn’t going to buy into it with with the advice I was given. He’d have made more money off me installing one in the first place, instead of putting in the combi I went with.