Air Top Evo 40, the middle-sized air heater. With a power of 4.0 kW and an outlet diameter of 90mm, this heater is suitable for larger boats. Below are some examples of installation in a sailboat and a motorboat. In both cases, each cabin has its own adjustable outlet. Only the outlet in the salon, where the thermostat is also located, is not adjustable and has a diameter of 90mm. Usually, on a sailboat, the heater is placed near the transom with the exhaust through the transom to prevent water ingress while sailing. On a motorboat, the heater is usually installed in the engine room. Please note that when installing in an engine room, the diesel system must be fire-resistant in many cases.