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The forced air heaters like you have are more effective than any bulkhead mounted heater, in that they can be set up to duct hot air into several areas of the boat. However they are more costly, and generally use more fuel and power than the others.
The Force 10s, as far as I know, are not fully vented heaters and as such are potential sources of odor and CO buildup.
We have the Dickenson propane 'fireplace' P9000, a bulkhead mounted heater that is fully vented, clean and safe.. given time it heats things up quite nicely (but had difficulty keeping things warm last week with -5C temps overnight) and it's quite difficult to get that heat into the ends of the boat. We usually close off the V berth if we have no guests to reduce the volume needing to be heated.
Of course the cost of the bulkhead heaters is about a third of an installed forced air installation... so it's attractive from that point of view. I guess it depends on how much you're going to need the heat, and in what conditions you'll be aboard at the time.....
Given that you already have all the equipment in place (ducts, fuel lines, etc) it would not make much sense to switch to a bulkhead heater, IMO...
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Last edited by Faster; 01-09-2011 at 04:10 PM.