Electric hook up and diesel heater

[Mike-]

Any recommendations for where I can get leisure battery, hook up and diesel heater installed in Berkshire/Surrey area? Thanks

 

[Newadventurer]

Hello complete newbie here , we are trying to decide whether to have a diesel heater or gas heater to our new T6 by the company doing the combi convsesion for us , whats are the pro's and cons please ?