Convert system from traditional tank fed gravity system, to Vaillant ecoTEC Plus 836 combination boiler, with Vaillant condensate pump installation.
Vaillant ecoTEC plus 630 replacement installation with system protection filter, & add air gap to condensate pipe.
Johnson & Starley gas condensing warm air unit upgrade/replacement.
Vaillant ecoTEC Plus 635 & Megaflow unvented cylinder installation, with existing underfloor heating. Rewired underfloor heating with new controls, to correct to work properly.