Alpha Boilers: 4.00%
Aqualisa: 8.00%
Baxi: 6.00%
Drayton: 8-12%
Heatrae Sadia: 6.00%
Ideal Boilers: 4-6%
MX Trays: 7.5% – 15%
Neomitis: 5.00%
Sentinel: 11.50%
Surestop: 10.00%
Testo: tbc
Thermogroup: 4.00%
Triton: 2.5 – 6%
Warmflow Boilers: 7.00%