”now it is heating upstairs and downstairs at the same time. The radiators are piping hot”

We installed a hunter solid fuel back boiler stove 9 years ago when we were building our house, we had problems with it from the start as it wasn’t heating upstairs and downstairs, so we had to get a plumber to have it heating just upstairs.
We got the heat hero system fitted last Saturday and now it is heating upstairs and downstairs at the same time.  The radiators are piping hot and I can’t sit close to the stove now as it’s that hot now.
And heathero actually rang me 5 days after it was fitted to see if everything was okay.
Very good customer service.