JUCA Built-In Fireplace Furnaces
Think of having a completely normal-looking built-in fireplace
with all the atmosphere it offers; at the same time heating the
entire house with wood! You can enjoy the fire through large
normal fireplace glass doors while the F-9A heats the entire house! Since
the huge firebox can take giant pieces of wood, you get long,
even, constant heating just like with a regular furnace. You
just don't have to pay for gas, oil, or electricity!
And the unit price is only
The appearance is EXACTLY that of a regular fireplace with
brass doors. There is a hidden 4" offset in front of the main body
to allow space for full thickness facebrick to be the facing of the
fireplace. This allows maximum flexibility for you in your choice
of facing materials, including brick, stone, veneer brick, ceramic
tile, marble, limestone, etc.
The firebox floor is lined with
castable firebrick. Our standard
465 cfm blower is automatic and very effective.
Optional blowers are
even stronger, to enable heating a whole house through a duct system.
Blower is 115 volt. Normally, the blower is mounted hidden
in the wall alongside the fireplace, but it can be remotely
located in a basement or elsewhere.
For a better view of the JUCA F-9A
When the JUCA F-9A is used with a 24" set of gas logs, the
appearance is exactly that while using wood. The enjoyment
of watching the flickering fire through the brass doors is
wonderful. While this is happening, the 90,000 Btu/hr gas-log
burner is creating enough heat, that is captured by the
sophisticated JUCA heat exchanger system, to be heating the whole house!
A variety of log styles are even available, from Mountain
Oak to Twisted Cypress to White Birch. Various accessory
control systems can use a wall thermostat to cycle the burner
on and off like a gas furnace or be controlled by a handheld
remote control. The automatic wall-thermostat controlled operation of
the gas logs' fire
cycling on and off is a popular option when burning gas, so that the JUCA
fireplace can act as the house's central heating system!
It's great to have this mode of operation while gas prices
are reasonable while still having the capability of heating
the whole house with wood if something silly happens again
in the Mideast. The change only takes a minute or two. The best of
A unique advantage of JUCA's non-airtight design is that,
whether using wood as the fuel or gas logs, you can open the
Bi-Fold Brass Doors to roast marshmallows. All the while,
it's still heating the whole house! The JUCA F-9A still works
extremely well, even with its doors open!
The rotating JUCA Model F-9A at left shows some of its features.|
On the front is the large opening of the huge firebox (brass
doors removed for clarity). The (included)
draft control for air for the fire.
On one side of the body is the
; on the opposite side is the
8" by 16" warm air outlet
(to feed into ducts and/or to
warm air registers
in the room). An
automatic blower control
has a temperature probe in the warm air chamber there.
Notice the offset of the door assembly to the main body (we call it the
"snout") that allows space for full thickness facebrick
everywhere on the facing. Also note the heat baffle and air chambers
below the firebox.
The entire firebox is surrounded by heat exchange chambers,
to capture radiant heat from the fire inside. Not visible are the tubular
heat exchangers bridging across inside above the fire, to capture
convective heat from the smoke.
The JUCA F-9A Series is intended to allow maximum flexibility
in accomplishing a desired appearance in an installation. If
the homeowner wants a rugged fieldstone faced fireplace, an
F-9A is perfect. If the desired appearance is that of an
18th Century Rumford traditional fireplace surrounded by an
ornate mantel, the JUCA F-9A is again perfect. Ditto for a
French Provincial treatment or a Hyper-Modern motif.
JUCA's desire to supply custom sized or styled units makes all
this practical. YOU just specify the required width, height,
or depth (if you feel our standard sized F-9A is inappropriate
for your application.)
If you're the type considering a Hyper-Modern motif, you
certainly must have liked the photo of our Wedge-Shaped
Fireplace Door-Set. We truly are capable of creating
virtually any appearance you need.
With a JUCA, you get remarkably even, comfortable, long lasting
heat everywhere in your house. You can eliminate your
regular heating fuel bill. It feels great to carry wood to
your JUCA knowing that each armload saves you $3.00 or more on
your heating bill. There are no cold drafts, even at floor level.
The built-in computer-assisted-design heat exchanger is so
efficient that you get more usable heat with less wood burned.
While heating fuel prices have been low, many people have
bought JUCA F-9As and installed (automatic wall-thermostat
controlled) gas logs. They can heat the house using our JUCA
as a 140,000 Btu/hr gas furnace. (Gas log ratings often limit
this to 90,000 Btu/hr, but that's still usually enough to entirely
heat most houses.) When fuel prices go through
the roof (and they will) it can easily be converted back to
wood in under 2 minutes! The best of both worlds! You can't even tell
the difference at the house's warm air registers when you change from one
to the other. The F-9 has been safety tested and approved to UL
The brass bifold doors make the appearance exactly
like a regular built-in fireplace. The only difference is that it
can heat the whole house with wood and eliminate your heating bill!
And there are actually over
2,000 different appearances available!
Including Arch-Top appearances which have been very popular in recent
If a utility room or garage is behind the fireplace, this option
would allow you to be able to feed the fire from the back through
a steel rear feed door (or the regular way from the room).
This is a double-sided fireplace version of the F-9A. If your
application involves a see-through or back-to-back fireplaces,
consider the X- option on a JUCA F-9A model. Normal thru-the-wall
depth is 30" (but, as in everything else, we're flexible
You have a lot of input on such a unit. If you want one side to
be an Arch-Top and the other (normal) Rectangular, and if you
want it 27" deep, there's little or no extra charge!
Door Assembly appearance. We offer over
2,000 different door facing
assemblies. Traditional framed or unframed clearview; antique
or polished brass, black, copper, nickel, chrome, pewter, real marble,
or combination finishes; plated finish or solid brass;
bi-fold (4 panel) doors or cabinet-style twin doors; even
arch-top designs; very plain to very ornate.
We consider the most popular size of fireplace in America, the
so-called 36" by 28", to be our standard size. HOWEVER! We
can easily adjust any of the dimensions to fit an application.
Our normal firebox is 24" deep, much deeper than the common
16-18". (We like to be able to put HUGE amounts of wood inside!
For people who want shallower fireboxes (we call them pancake
units), there is no extra charge. Similarly, we normally put
a 4" snout on the F-9A to provide for the thickness of regular
facebrick. When people intend to face their unit with stones
from their farm fields, we have made snouts as large as 10" deep.
Veneer brick facing can allow snouts as small as 1" if space
is tight and firebox depth is less important. (Nearly everyone
gets the regular 4" snout.)
Width is also buyer selectable. For each 6" extra width over
our regular width F-9A, add $250 (mostly for material.) We
make quite a few 42", some 48", a few 54", and occasional
units up to 78" wide. If you're going above 42" wide or you
have a rather short chimney, use the Chimney
Design Calculation Program to confirm
appropriate chimney size and performance. Or
check this guidance page.
Opening Height is also buyer selectable. If higher than the
regular 28", then use (319) as above and contact us for price
differential. Or check here.
Arch-Top units of ANY oversize should use (319) to make sure
there is extra chimney capacity for that size unit.
Or check here.
||12.3 cu ft
||15.4 cu ft
||12.3 cu ft|
|Door Ass'y Size:
||36" x 28"
||36" x 28"
||36" x 28"|
||465 to 2550
||465 to 2550
||465 to 2550|
||8" x 16"
||8" x 16"
||8" x 16"|
Energy-Related presentations in this Domain:
Self-Sufficiency - Many Suggestions A thorough presentation
Global Warming - The Physics of the Process. (June 2004, June 2008)
Global Warming and Climate Change - The Physics (June 2004, Feb. 2007)
Alternative GREEN Water Heater - Non-Fossil-Fueled HeatGreen - A Simple Water Heater, HG3a (biodecomposition) (March 2007)
Alternative GREEN Furnace with no Fire - Non-Fossil-Fueled HeatGreen - A Simple, Home Heating Furnace, HG3a (biodecomposition) (March 2007)
Solar Heating - Low-Tech Active System Low-tech, low cost approach (April 2007)
Heat and Cool a House Naturally, without a Furnace or Air Conditioner (1977, Nov. 2000)
Energy Supplies of the World - Petroleum, Coal, Gas, Uranium. Oil, Natural Gas, Uranium supplies and consumption (May 2010 Report)
Asphalt Pavement - Black Surfaces and Sunlight Environmental Effects of Asphalt Pavements, Roofs, and Parking Lots (August 2007)
Earth Spinning Energy - Perfect Energy Source From the Earth's Spinning (1990, Nov. 2002)
Earth's Spinning - Perfect Energy Source (1990, Dec. 2009)
Tornadoes - The Physics of How They Operate. Tornadoes, including How they Form. A potential energy source (Feb. 2000, May 2009)
Electricity - Unlimited Source of Solar by an Artificial Tornado. Tornadoes, including How they Form. A potential energy source (Feb. 2000, May 2009)
Survival Ark - 60-Acre Hexagonal Artificial Island, Floating Communities for Survival For Sealevel Rising (July 2008)
Electric Power Plants - Climate Effects
Global Warming Effects of Carbon Dioxide
Hydrogen as a Fuel for Vehicles. (August 2003)
Solar Heated House NorthWarm Totally 100% Solar Heated House - Version 1 (1979)
Solar Cells Photovoltaic Cells, PV, Electricity from Sunlight (Jan 2002)
Driverless Vehicles - High-Speed Transportation 200 mile per hour TRANS Super-Efficient Transportation System (invented in 1989)
Electric Cars, Hybrid Cars, the Physics Battery-Powered, Hybrid Cars and Hydrogen-Powered Vehicles (April 2006)
Wind Power, Wind Energy, Practical Windmills Practical Wind-Generated Electricity (Residential, some Watts) (1975 and April 1998)
Tower Windmills and Electricity, Modest Efficiency Practical Large-Scale Wind-Generated Electricity, 1200 KiloWatts (Community, a thousand homes) (a million construction jobs and 12,000 MegaWatts of electricity Nationally) (June 2007)
Earth Energy Flow Rates due to Precessional Effects (63,000 MegaWatts of Energy) (Sept 2006)
Power Plant Wastes - Productive Usage of Nuclear Waste. Productive Disposal of Nuclear Power Plant Wastes (1980s, Sept 2005)
Conserving Energy - Methods and Processes
Energy Storage - Methods - Efficiencies Various Methods
Solar Energy - How Much Energy Comes From the Sun
Sun and Stars - How the Sun Works - Nuclear Fusion. Creating Light and Heat
Energy Inventions - Many Forms of Energy Supplies. Related to Energy Crises
Solar Energy - Generating Electricity From solar, wind or other sources nearly 24 Hours a Day (2001, tested 2003)
Solar Energy - Generating Electricity, Improved A Unique Method of Using Solar Energy to Generate Electricity (late 2010)
Alaska Pipeline - Alyeska - Physics. Pipeline Local Climate Effects (August 2005)
Home Air Conditioning Natural, GREEN and FREE! (1978, December 2000)
Hybrid Vehicle - An Improvement. An Entirely Different Approach to a Hybrid Vehicle (1992, May 2008)
Woodburning Furnace - JUCA Fireplace, Woodstove - JUCA Super-Fireplaces (designed 1972, manufactured 1973 on, still not matched)
Burning Wood for Heating - The Physics. Wood as a Heating Fuel (published 1978)
North Pole is Heating Very Fast. Faster than anywhere else on Earth.
Global Warming and Climate - Possible Solutions
Aerodynamic Lift - How Airplanes Fly. Bernoulli Effect, Reaction Lift (April 2003)
Efficient Airfoil Flight - Active Surface - TURCAN. Greatly Reducing Turbulence and Drag for Aircraft and Airfoils, TURCAN (summer 1998)
Construction School for GREEN Technologies. My Concept of a GREEN Campus (1990, Dec 2008)
Conservation of Angular Momentum - An Exception or Violation. A Violation of the Conservation of Angular Momentum (Sept 2006)
Hurricanes, the Physics and Analysis A Credible Approach to Hurricane Reduction (Feb 2001)
Automotive Engine - A More Efficient Approach. Significant Improvement (2001)
Global Warming - The Politics and Business Why No Leaders Seem to See Urgency in Global Warming
Energy from the Moon - A Version of Tidal Energy Collection. (Artificial Tides) (1998, 2010)
Energy from the Moon - Version of Tidal Energy Collection 2. (Energy Harvesting) (1975, 2010)
Electricity from Solar, Wind, Water, More. Make All Your Own GREEN Electricity (2001, 2003, 2010)
Woodstove Energy Production and Efficiency, from a Radiant Woodstove (published 1979)
Firewood Ratings. Firewood Info Chart.