South 

(Somerset,Wiltshire,Dorset)

Bioheat   01963 32604

(Oxfordshire, Berkshire, Hampshire )     

Arborworks Ltd  0845 4660284

Southwest

(Devon ,Cornwall)  

Safeheat  01803 523700

Southeast

(Kent,Surrey,Sussex)

Cosi Heating   01227 780830

East

(Norfolk,Suffolk,Cambridgeshire)   

Ecoexcel   01728 621215

Northwest

Tomkinson Heating  01625 422 173

Northeast

Harworth Heating Ltd  01302 742 520