webasto diesel heating

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Hunter326Inis

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Aug 22, 2010
8
Hunter 326 Legend The Netherlands, port Zelande
Hi,
I am planning to have a diesel webasto heating installed. The 3900 EVO. Who has the layout of the heating system for my Hunter 326. I would like to know where the heater should be placed and where the air needs to go in the rooms. Etc.
Thx.
 
Bill Roosa

Bill Roosa

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Jun 6, 2006
6,990
currently boatless wishing Harrington Harbor North, MD
Don't think there is one

Don't think any hunter has a heating system factory installed. You could use the existing AC ducting and co-locate the "furnace" near the AC compressor.
I'd try and get the AC duct layout for your boat if it has one. a 32' is pretty small for AC so there is going to be some shoe-horning for sure.
 
Velero49

Velero49

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Jun 4, 2004
292
Hunter 49 123
It’s not recommended to use the AC ducts because of the temperatures involved and the fact that is more efficient to have the heater vents close to the floorboards. I have done some research and ducting is critical to maintaining pressure and air flow in the system by starting w/ 3 in ducts (AC ducts are 6 in on my boat) and then branching out to 2 in. Avoiding major turns and kinks is essential, if the air in the heat exchanger gets too hot because of restricted air flow it will shutdown the burner. In my case 5 vents w/an option for 2 more. My plan is to heat the forward cabin, the saloon and both heads leaving the 2 aft cabins w/heat. Also get a heater that is equal or higher in BTUs than your ACs.
 
Don12364

Don12364

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Dec 2, 2003
1,637
Hunter 376 Warsash, England --
Don't forget to have an air outlet in the heads. I forgot and regretted it.
 
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