We also have a pilothouse with an Espar forced air diesel heater
. The exhaust temperature is hot enough to cause burns. [I just turned my Espar D5L (5KW) on high and measured 241°F at the exhaust port.]
I haven't seen an exhaust fitting for horizontal surfaces for these heaters.
I wouldn't place our exhaust outlet under our pilothouse windows because we need to walk past those points on the narrow deck
, and skin/rain gear
could definately be impacted if someone stopped next to it while the heater
Ours is instead positioned through the hull
just under the toe rail and above our rub rail as shown in the photos, below. [On the inside of the hull
, the exhaust line loops up to help mitigate water
ingress. There is also a water
drain in the exhaust line before it attaches to the heater.]
Close-up of exhaust fitting with custom SS diverter welded on to deflect rain water.
In case this is useful.
PS: Our heater- and it's combustion air inlet- is in our ventilated, isolated engine
room. Heater make-up air is drawn from a midship cabin which has a port part way open most of the year. This assures there is some fresh air mixing with the recirculated air being distributed throughout the boat