Check out our tool selection guide or chat with a drain brain! Baxi offers main types of regular boilers this system is more space consuming as you need two water tank cylinders, one pump and a hot water cylinder in the airing cupboard. Combi boilers: is a combi boiler the right boiler for you? When you need an emergency plumber, hvac technician, or. Great customer service! very trustworthy people!! With a typical boiler installation costing anywhere.