|Knut M. Hansen, Tjome, MOR asks: |
I see you keep nice inside temperatures even in icy conditions. Do you
think the somewhat smaller Dickinson Newport heater could have done the
job as well?
And, planning for installation in our N46, will placing the flue closer to
the mast be possible?
Scott Flanders from Egret responds:
Knut, first let me say the Dickinson Antarctic heater makes Egret
acceptably livable for us, however it is cool down below. I even thought
about adding a second, smaller heater in the forward guest stateroom but for
the relatively short time we will be here and the difficulty of flue
installation we decided not to. The Antarctic and Newport Dickinson both
use the same carburetor so the fuel burn is the same. The Antarctic gives
the most BTUs and you will need all of them at times however, we usually set
the fuel delivery dial at 1.5-2 vs up to 5.
What would be ideal is to add the hot water loop inside the unit when you
order it and plumb a stateroom radiator. This is a difficult installation
running the hoses and adding the expansion tank above the unit. Perhaps the
tank could be put in the exhaust stack. If you added the hot water loop the
Newport would be sufficient.
Egret's flue is EXACTLY where it needs to be. When you remove the overhead
ceiling panels you'll see why. (We stole 12V from the fan circuit and ran
the wires down the stack exiting near the fuel hose - a 1 1/2 amp fuse
protects the little heater fan motor.) Also, I believe it's better to not
weaken the arch support of the mast by placing the flue to close to the
stack. The trick is to drill UP from the salon to center the 5" (12.5cm)
hole required for the flue installation. Also, we started with a 22" length
of extra pipe for above the boat deck but in the end removed it with no
difference in performance.
The 11 gallon (42ltr) gravity feed tank, 41cm high, 33cm deep, 39cm wide,
(with 1cm legs for air circulation) is made from stainless steel. We have a
drain at the bottom and take the fuel 2cm above the bottom with a valve at
the outlet. The tank is insulated with 6-7mm close cell foam and covered
with a sumbrella cover. The type A fuel hose (highest grade) is routed thru
the exhaust stack exiting just above the carburetor. In the short run from
the stack to the carburetor in we added an in-line fuel filter. This tank
arrangement works well needing filling every 4-5 days or so. (the tank fits
between the steps to the pilothouse roof and the stack)
Bottom line: The Dickinson package works well. It would be ideal with the
hot water loop installed with a small circulation pump to circulate the hot
water. The picture shows the heater installation and custom stainless steel
tray we had made to capture any spilled fuel. (The heater legs are mounted
to studs. There are no tray penetrations) The stainless steel heat guard
behind the heater mounted to the exhaust stack isn't necessary if you stand
the heater 10cm off the wall. We made our shield with round vent holes on
the side and added 1.5cm insulation to the inside of the panel. Also, the
rocks placed on top of the heater act as a heat sink and increase the heat.
Good luck and enjoy your N46. Ciao