Eberspacher air intake length

[madabouttheboat]

There were some models, a few years back, that required a balanced system. The D1LC was one I think, but the modern units defo do not.

 

[steveeasy]

Assuming you mean the combustion air intake, not the cabin heat air intake, its usually 22mm for Ebi the same as the exhaust, but other brands use 24mm. Probably would need to be heat resistant as v close to the exhaust near the body of the heater. Mine has not got one fitted on present boat, and we did not have one on our previous boat. The important thing declared for my propex gas heater is that inlet and exhaust are a sensible distance apart (30cm ish), but as one is out through the stern and the other under the stern deck, there was no real issue for the Ebi, and both exhaust pipes were about 40cm which was probably close enough to balance zero on intake if that was a real issue.

However no one balances the car or truck exhaust length with the engine air intake so I am puzzled by the apparent requirement

I’ll get details of the heater I’ve referred to with filtering system allowing it to run inside.

Steveeasy