Had a brivis gas heating system put in in 2016 by Hi-Tech. Their installers was a brilliant tradesman, really hard working and knew his trade well. Have had no problems with the heating system.
Since then I have had the system checked every year by Hi Tech who have been very professional and reliable. I recently had a question about a restart after the gas to my house was turned off and Hi Tech got straight back to me and solved my problem in a flash over the phone.
Very good company to deal with and good technicians.

Nicky Lowe. Thornleigh NSW