The Airtronic D4 Kit comes complete with everything required for installation and is suitable for sailboats between 26 and 36 feet, and power boats between 17 and 32 feet.
The Airtronic D4 model offers a range of four thermal outputs to closely match your on board heating needs. From a Low 3,400 BTU output, to the "Boost" level of 13,650 BTU's, the Eberspaecher D4 Heater is compact, convenient, economical to run and time tested for safety - with over 30 years of successful installations.
With space a premium in a sailboat, the compact size of an Eberspaecher D4 unit reflects this with the heater usually being fit in a stern/cockpit locker, and the exhaust being led away to the transom. The warm air duct system is led to the cabins behind panels and through interior lockers. All that can be seen are the outlets in berth/seating fascias. The ducts are kept as short as possible to maintain an efficient air flow. As ducts pass through interior lockers, natural surface heat loss creates useful drying compartments. This surplus heat is also doing much for heating those hidden corners beneath the cabin floors. Fuel is drawn from the main diesel tank and the actual consumption is so small it does not materially affect the capacity of fuel carried for the engine.
A 12 Volt battery connection is necessary to drive the initial ignition, fuel system and main air fan, however the heater is designed to offer a balance of economic electrical draw with optimum heat and air power performance.
Note: Kits not supplied with Combustion Air Silencer referenced in Manual