Wholesale, sale:
-installation material (water-heating-gas)
-tiling, paving
-sanitary ware
-sun collectors
-boilers (for wood, coal, biomass, pellets)
-gas, electric boilers
-Fireplace stove
-electric, combined, exchanger, gas heaters
-accessories, fume extraction, plate heat exchangers, collectors, vessels
-pumps
-mounting, insulation, ...