JUCA Advanced Design Woodburners
Many customers know a lot about normal woodstoves. JUCA
products are so advanced and unique that there are many differences
from other products you may know about. Here are some comments
on unusual aspects of the JUCAs.
Normal high-efficiency (40% in actual use)
stoves are so called "air-tight." This design of operation
suffocates the fire to control it and therefore causes incomplete
burning. This is wasteful of energy (up to 1/3 of all the energy
in the wood is unburnt and goes up the chimney) and causes some
serious safety hazards. Carbon monoxide is produced by air-tights
in large quantities which could cause danger if the chimney ever
has a leak. Creosote is present in the smoke in huge quantities
due to the incomplete burning. If cooled below 350°F or so
this stuff will condense in the chimney and accumulate there.
If it ever later catches fire, it burns ferociously enough to
possibly damage the chimney or the house itself. JUCA
products are non air-tight. Our fires burn very completely and
cleanly. JUCAs get much higher combustion efficiency this
way. Reports from users and our testing suggests that the non
air-tight operation of a JUCA produces only one-tenth to
one-fifteenth the creosote of an air-tight product comparably used.
HI-EFFICIENCY HEAT EXCHANGERS
The arrangement of the surfaces inside a JUCA is the heart of
its efficiency. The technology of gas/oil furnaces and of coal/coke
burning industrial boilers has been applied to a wood-fired
device. The result is a heat transfer efficiency unmatched in
any other wood-burner on the market. Actually, it would be very
unsafe for an air-tight product to have an efficient heat
exchanger. If it did then all of that massive creosote in the
smoke would certainly condense in the chimney.
It is actually necessary for air-tight stoves to have somewhat
INEFFICIENT heat exchangers so as not to cool the smoke too much.
Our NON air-tight design doesn't have much creosote in the smoke
so we can safely extract a lot of heat. Even when the smoke is
cooled below the creosote condensing temperatures, little accumulates
because little was in the smoke to condense. We used a computer to
help design the JUCAs heat exchangers for absolute optimum
Advanced aerodynamics and thermodynamics technologies were used
and each part of the exchange system was independently designed
for the maximum benefit for the assembly. You can certainly see
why our JUCA, with more complete burning (higher combustion
efficiency) and better heat exchange (higher transfer efficiency),
has much better overall performance than any air-tight can safely
have. If you have seen one in operation then you already know that
there is a remarkable difference - the JUCA is very
NO CATALYTIC CONVERTER NECESSARY
Air-tight products have to resort to a catalytic converter or
secondary combustion system to deal with the problem (created by
the air-tight operation) of the massive creosote in the smoke.
Since in a JUCA smoke leaves the area of the fire with very
little creosote the problem doesn't even exist. Ours is the better
FORCED AIR SYSTEM
Conventional woodstoves generate heat that rises directly to the
ceiling. Cold drafts occur at floor level. There could be as much
as 60 degrees difference between the floor and ceiling. Corners and
other rooms are not heated. A JUCA sends the heat along
the FLOOR warming it up, spreading heat to corners and other
rooms. The warm air rises to make surprisingly even heat throughout
the heated area. Most JUCAs also have the capability of
joining a ducting system to send heat to distant parts of the
house as well.
Some competing products offer forced air systems with a small
capacity blower (seldom as large as 400 cfm) which is optional at
extra cost. The JUCA comes standard with a good sized
(465 cfm) blower with optional choices available up to 2500 cfm.
So called add-on furnaces often only give an output duct size of
6 or 8" diameter. JUCAs have a generous 8 x 16"
rectangular outlet to ensure being able to send enough air to fully
heat the whole house.
The end result is an overall evenness of house temperature and a
comfort level that is often better than that from a gas furnace.
The unique JUCA operating principle allows this level of
comfort previously unheard of in wood-fueled heating. Even the
fact that our units are designed for large unsplit wood has nice
consequences. When you use 8" diameter logs, it is easy to
keep a fire overnight. Most experienced JUCA owners are
so spoiled about this that they are disappointed if they wake up
to a house that is not right at 70°F.
Our units are meant to be able to be installed in the living area.
Glass areas and modern design help fit in anywhere. At the same
time it operates as a warm air furnace at high efficiency. All
this - and it uses wood like an efficient woodstove. Even though
Franklin stoves are described as fireplace/stoves, they are
rather inefficient when you enjoy the fire so you have to choose
fireplace OR stove. A JUCA gives you both at once.
Any other add-on furnace is ugly and has to be installed in the
basement. A JUCA can be installed downstairs as a
conventional furnace, or as an add-on, or it can be installed upstairs
in the living area and still be able to send the heat to a duct
system downstairs. Of course, it can be operated as a free-standing
woodstove as well. Sometimes people initially install it without
ducts. Then at a later date they may install ductwork.
VERSATILITY PLUS SAFETY
The outer shell of our units generally runs too cool for cooking.
One family in Indiana we know of actually kept a candle on the unit
all winter while it heated their entire home. From the comments
on this and other JUCA info sheets, you already know the safety
advantages over air-tight products. The construction of
JUCAs also is safety oriented.
Numerous internal features ensure a long and useful lifetime. Even
our popular B-3B weighs in at 495 lbs, so they are built to last.
We use high quality high temperature glass, and a removable metal
glass-shield. If you're away from home or in bed and your logs
shift around, this panel makes extra sure that nothing unplanned
could possibly happen.
JUCA - THE COMPANY
Sometimes potential customers wonder why they haven't seen our
products heavily promoted in magazines, etc. They think "If this
product is as good as it seems, why don't they push it more?" Well,
that has to do with our attitude toward such things. We would
rather concentrate on making fine products. We choose not to hard
sell. We much prefer to let our products sell themselves, as they do
when they're seen at a friend or neighbor's. Then anyone can make
up their own minds.
The bulk of our sales are these "word-of-mouth" sales.
Virtually every dealer that we have ever had originally owned a JUCA
and had to ask us to become a dealer. We like truth and accuracy
about our products, and we encourage such in anyone representing
JUCA. You won't often see ads for our products either, and
when you do they won't be flashy - just honest and accurate. In
over twenty years of offering these units, we have always been
proud of what we are doing - helping our fellow man deal with one
of life's many problems. We intend to continue the same tradition.
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