Putting a diesel heater into a Macwester 26

[mac26mk1-1969]

The exhaust drain is only advised on long runs of exhaust,the Eberspascher manual will tell you that. I prefer to recirculate the air rather than bring the moist (over 90% today) cold salt laden air in to the boat for a quicker warm up.

That makes sense. So a short run doesn't collect much moisture, and it burns off easily. A few people have confirmed this to me now, even if they leave it for months in winter.

 

[mac26mk1-1969]

On mine the copper coil just drains into the bilge.

It's only a bit of condensation, or if rain enters via the double skinned transom fitting (i.e., not much water)

S/S 24MM EXHAUST DRAIN ELBOW WITH 2 CLAMPS FOR EBERSPACHER WEBASTO DIESEL HEATER

It separates water from fumes. Another thru hull seems way over complex.

The copper coil was a separate item, but I expect it's easy to make. A 3mm flexible copper pipe and a compression fitting.

Make sure you order the correct size!!!!

Is there ever a risk of the water in the coil evaporating, so it blows fumes in?