----- Original Message ----- 
From: "Noel Russell" <[email protected]>
> Look into Hydronic Heat/Radiant flooring. 3 good names webasto (we do
> not have), ITR Hurricane (we do have), and Kobala (very nice unti, needs
> a large area in engine room though). Insulate using a concrete barrier
> type insulation which involves bubble wrap on 2 sides plus mirrored
> aluminum foil stuff (which I am installing)

REPLY
Upstate NY  gets really cold.  Good insulation is a must.  However  diesel 
fired heaters  will become expensive to operate.
Depending on how much fuel costs  escalate  it could be double or triple 
the cost of heating electrically.

Depending on  boat construction and  deck layout it may be possible to  use 
a solid fuel  heating appliance.  Remove for summer sailing.  One guy I knew 
put the stove pipe out a porthole on an old schooner.
I will be the first to admit  this is not a clean option.
Obviously  the pocket book is going to dictate  what options are  going to 
be viable.
Much also depends  on  the actual location of the dock the boat is moored at 
for the winter.
An urban location such as Noel has is not going to tolerate a solid fuel 
heater but a rural location may.
And solid fuel  could in fact be  more readily  available out in the country 
compared to in the city.

Something  many people do not remember to take into consideration.  All 
hydronic heaters regardless of make does require power.
Most of them  run from ships DC battery supply.  However  this also has 
problems.   Many of these units are designed to run from a 13.6V   DC 
supply.  If the  DC voltage drops down to 11.0 V   at the battery   the line 
losses could result in  even less at the  heating appliance.  While I was a 
tech help  person at Xantrex  we had numerous calls  concerning this issue. 
We were also fortunate  to have in our engineering  staf someone who had 
worked for Espar  in Germany for seven years.  He was imtimately familiar 
with the problems associated with low voltage and  diesel fired  furnaces of 
all description.
Best bet is to provide a dedicated  power supply for the heating  unit. This 
guarantees  a steady and elevated voltage  so th eunit burns clean and runs 
smoothly.   When voltage drops the ignition circuit   tends to have mis 
fires. This in turn makes for a sooted up combustion chamber. Smoky exhaust 
and  frequent calls to a service guy to come and "fix it".

The other  mattter to consider is the fact many of the normal boat / RV 
/vehicular heaters  are fitted with regular sleeve bearing  fans, pumps, 
and ventilation blowers.  These typically have a 3000 to 5000 hour lifetime. 
Afte that the bearings are worn out..
Either get ball bearing motors fitted or  else make sure you can  replace 
the motor and/or bearings.  I installeed a brand new  propane furnace.  The 
fan quit one month past the warranty period.  Bummer!  New fan $169.95

Arild

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