I've got x3 prem i air 2 kw door curtain heaters in my garage , x2 heat setting , fan for summer , remote control , swing , digital program etc and £50 each .
I normally only have 2 on at anyone time and they heat the garage very well ,
as a sparky I would of purchased dimplex heaters but for £150 it was to much money
iVe had no problems with them and the only took 5 mins to hang
cheers paul