Ceiling-mounted air heater

for greenhouse

Doll hot water-register air heaters of the type-series WDA (Warmwater-Doll-Automatic) have been approved for application in greenhouses of all kinds of constructions since decades. Due to the outmost solid and robust construction as well as the humidity- and UV-protected motor, Doll devices are also able to be installed energy saving in vertical air direction below the greenhouse ceiling. Special Doll blow-out feedheads with adjustable air steering fins in all four directions are available for this kind of installation. The casings are serially made of fully zinc-coated steel platings (lacquering in RAL-colors on demand available for an extra charge). The devices have been specifically developed for the increased requirements in the horticulture sector. The heat registers can be manufactured in copper aluminium (standard) or steel zinc-coated completion - as well made of stainless-steel.