Message-ID: <3826A449.2244@erols.com>
Date: Mon, 08 Nov 1999 10:22:01 +0000
From: "Jeffrey B. Chipetine" <abcrental@erols.com>
Reply-To: abcrental@erols.com
To: lancair.list@olsusa.com
Subject: Shop heat
Mime-Version: 1.0

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Gentlemen ,

FWIW, While all the discussion I have seen on this subject is cost
related, there is an (not inexpensive)alternative to breathing in the
components of combustion and having any residue on your work surfaces.  

We use some specialized Forced air "clean air" heaters in our Equipment
Rental business.  These heaters utilize an air to air interchanging
heater.  All by-products of the combustion process are sent out a
standpipe to your roof vent.  The heaters are ductable so you can direct
the heat to a specific area of the shop or work if needed. These units
can burn diesel, kero, or home heating oil.  Output is about 135000
BTU's.  Power is 120 volts @ 9amps.  

Downsides:  Cost: about $1800 plus freight.  Size:  main unit is about
5' long, 2'wide, 3' high. Not as quick a temperature rise when compared
w/ a direct fired unit. 

Upside: (besides the lack of CO in your body or oil in your work): NO
ODOR AT ALL!  No "heavy head" syndrome from even marginal amounts of CO
breathed in w/ direct fired heaters.  Able to run on multiple fuels. 
Ability to be plumbed directly from your own home heating oil storage
tank if available. Reasonalby efficient burn rate of about 1.6 GPH. 
Very Quiet. Ability to achieve large temperature rise in reasonable time
frame. Main unit can be located out of doors under cover and heat ducted
inside or unit stays inside and increases efficiency through recycling
pre-heated air (note:  you must provide some venting into the workspace
to allow for O2 consumed during combustion process). If located inside, 
you can use standard woodstove flue-pipe to vent out.   Thermostaticly
controlled. Easily maintained. Nice back-up for your house if your main
heating plant goes on the blink. These units should be easily available
through any knowlageable Equipment Rental Dealer in your area,  though
they would have to be ordered specially. If your local Rental Equipment
house is chock full of idiots,  you can email me for the information.

Ascessment:  We use these heaters whenever our customers have the
requirements of no-odor, indoor use, or when local codes require
indirect fired heat.  Propane and Kero direct fired heaters will cause
headaches and consequential poor workmanship as a result.(propane's only
perceived benefit is a less objectionable odor).  We have found them to
be very well received despite their high cost for either purchase or
rental.  

Observation:  The posting about the Japanese heaters being very clean
burning is correct.  When run on clean kero,  there is almost zero odor
and very little indoor polution.  Their downside is the lack of a forced
air feature (at least in the units we have seen) and the support
available in the USA if support is needed.  We would say that they would
be a good idea in a well vented shop for MAINTAINING temperature, but
would have a difficult time acheiving a large temperature rise, but you
must still accept an elevated co and residue on your work (but at a
significantly reduced level than a traditional forced air heater.

I would respectfully suggest that each of you working in cooler
environments consider your choices very carefully before committing to a
course of action, and in full command of all facts so as to make an
informed decision.

Should anyone wish to investigate these heaters more completely,  please
email me privately and I will be happy to forward whatever information I
can from the sales literature. 

Regards to all,  ....fly and build safely.....Jeffery B. Chipetine  
abcrental@erols.com

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