JUCA Built-In Fireplace Furnaces

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

Gas Burning

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 both worlds!

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) door assembly has a draft control for air for the fire. On one side of the body is the (Standard) blower ; 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.

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 Standards.

Model F-9A

'R' OPTION

'X' OPTION

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!

APPEARANCE OPTIONS

SIZE OPTIONS

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.

The JUCA Web-Site is at: http://mb-soft.com/juca/index.html

The Earth's Rotation as a Source for Energy
Waste Nuclear Power For Making Electricity And Heat?
The Physics of Efficiency In Electric Power Plants
Individual Ways of Reducing Your Energy Usage
Methods of Storing Energy for Later
How Much Energy Comes From the Sun? And Why is there Global Warming?
How does the Sun create so much energy?
Inventions Which Might Help Deal With Coming Energy Catastrophes
An Invention to Efficiently Make Electricity from Solar
Enormous Heating of the Atmosphere by the Alaska Pipeline
Air Conditioning without Huge Electric Bills and without Freon
A Method of Storing Summer Heat to (Nearly) Entirely Heat a House all Winter
An Extremely Highly-Efficient (and Fast, 200.0 mph) Transportation System for People and Products
The Sophisticated Woodstove I Invented in 1973

The Physics of Wood as a Heating Fuel
Why is the North Pole Heating Faster than the rest of the Earth?
A Possible way to greatly reduce Aerodynamic Drag of Airplanes