Falk selected 8 mm (more than Ό") Swedish naval grade steel, rather than cast iron, because steel would be lighter and more malleable than iron. Reduced weight permitted larger units, which allowed greater heat output. Stoves could also be taller, permitting more stove size for the floor space taken up, better viewing of the fire, and a space under the firebox for wood storage. Because steel can be cold-bent and stamped, stoves could be designed with cleaner lines, adding a new dimension to their styling.
The effectiveness of RAIS stoves is hugely dependent on air flow control on a high technological level. Falks quest for efficiency led him to think about convection, which led to stoves that heat by both radiation and convection, a principle that not only holds good today, but has been developed to the point that the newest models have no ash pans because the level of burn control obviates their need.
The induction of air into the combustion chamber is controlled. Emissions from combustion are directed into an intensely hot area above the baffle over the chamber, where they are subjected to post burn reduction. And the hulls themselves are built with a considerable air space between the interior body of the stove and the exterior. That air is warmed and heat is both radiated from the exterior and emitted through spaces in the body.
In the intervening years, while the principles that guided Falk remained the determining factors of design, differences of execution of those principles have changed some of the details. For instance, some of the models have ash pans with lids on them for ease of ash removal, but today some models have no ash pans because combustion has been so improved that very little ash is left, obviating the need for an ash pan or a shaker grate.
Handles on all models are stainless steel, a non corrosive metal and one that does not acquire heat to the same degree as blue steel. They are hollow for cooling, so they remain cool even when the fire is fully running.
Stove pipes are six inches in diameter. Some models are top vented, while some can be either back or top vented. It is necessary to specify a top or a back vent. Stoves on turn tables must be vented from the top.
Depending on the model, stoves are offered with various parts in soapstone, either standard or as options. Once warm, soapstone holds heat for hours, and it has the effect of evening out the rate of heat dissemination.
Some stoves can be installed on a turntable, permitting the stove to be turned through 360 degrees. These stoves must, of course, be top vented. They are fitted with rollers just beneath the top plate. The pipe drops down onto the rollers, thus permitting it to remain stationary while the stove revolves. Similarly, at the bottom of the stove, there are rollers to permit the stove to turn while the platform it sits on remains still. (Note: Turntables require a three-foot clearance all around.)
To accommodate houses which have been built to air-tight standards, some stoves can be fitted with an air system which permits air to be drawn in from outside the building. Those models are New Mino, Gabo Wood, Malta, Bando.
The X-Basic is a black steel, top vented stove, built to the latest technical specifications to derive the most efficient combustion.
Its heat output is considerably more than any of the other models. Its optimal heat output is rated at 72 kBTU. Its heating capacity is approximately 4,000 sq. ft.
Optimal heat output is a measurement derived under specifically controlled conditions in order to provide a base of comparison.
The X-Basic is as wide as it is tall, making it look lower than it is at 38.8. It has a novel door which slides upwards, and is hinged at the bottom to allow it to be opened forward and down.
It has no ash pan because combustion is so close to complete that there is virtually no ash.
Stove exterior 38.6 X 20.7 X 38.8
Firebox interior 21.7 X 14.2 X 16.9
Weight 858 lbs
Black steel $10,900
The Bando and the Malta are the same size in terms of heat output with "optimal" outputs of 23.9 kBTU. The Bando is a soapstone-clad stove, including the stove top and the oven compartment shelf. It has flat sides and back and a curved front for maximum visibility of the fire. It has an ash pan and a shaker grate.
The Bando can be top or rear vented. It is necessary for the stove to be top vented if it is to be on a turntable. There are rollers at the top of the stove for the pipe to be settled down on, permitting it to remain in place while the stove turns, and rollers at the bottom, permitting the stand to remain in place, while the stove turns. (Note: Turntables require a three-foot clearance all around.)
There is an air system, which permits air to be drawn from the outside, available as an optional extra.
Stove Exterior measures 21 3/4 x 23 x 43 3/4
Firebox Interior measures 14 1/8 x 13 3/4 x 14 1/8
Weight 580 lbs
Soapstone with gray steel $6,090
Turntable & connecting pipe $495
Air system $165
The Malta is similar to the Bando for heat production with an "optimal" output of 23.9 kBTU. It is a steel stove in either black or gray with a soapstone oven plate as standard equipment. A soapstone top plate can be ordered as an optional extra. This stove has flat sides and back and a round front. It has an ash pan and a shaker grate behind the door. The front of the firebox has a seal to ensure that the door is closed tightly in the interest of efficient combustion. The sides and the back are flat but the glass door is curved for better viewing of the fire.
The Malta can be either top or back vented. It can be installed on a turntable, in which case it must be top vented. (Note: Turntables require a three-foot clearance all around.) An air system, which draws air from the outside, is also available.
Stove Exterior measures 20 7/8 x 20 1/4 x 42 3/8
Firebox Interior measures 14 1/8 x 13 3/4 x 14 1/8
Weight 412 lbs
Soapstone Top Plate 77 lbs
Stove $3,990
With soapstone top plate $4,610
Turntable and connecting pipe $495
Air system $165
The Rondo is a "New Generation" RAIS, but it adheres to the design concept of the original stoves. In many ways, it has the best of both new and earlier generations.i.e. a wood storage space at the bottom and a baking shelf that has a soapstone slab as standard equipment. But it has the latest in air flow and combustion control. It has no ash pan or shaker grate because combustion is so efficient that little ash is left to need an ash pan. The "optimal heat output" is rated at 17 kBTU. It can be installed on a turntable. (Note: Turntables require a three-foot clearance all around.)
The Rondo is offered in steel, either gray or black. A soapstone top plate is an optional extra. It can be either top or rear vented.
Stove exterior 19 1/3 x 19 1/3 x 40 1/2
Firebox interior 13 1/5 x 11 2/5 x 13 3/5
Weight 308 lbs
Soapstone Top Plate 55 lbs
Stove black or gray steel with soapstone baking compartment shelf $4,610
Stove black or gray steel with soapstone top and baking compartment shelf $5,180
Turn table system $495
The new Mino is available in two versions. One is a soapstone stove with soapstone sides, top, and oven shelf. The steel part of it can be either black or gray. Or, it can be a steel stove, either black or gray, in which case the oven shelf plate is in soapstone as standard. The steel models can have soapstone top plates ordered for them as optional extras.
The Mino II has all of the newest RAIS developments in air control, which contributes to the highest combustion and heating efficiency, obviating the need for an ash pan and shaker grate.
The Mino can be top or rear vented. And it has a space for wood storage at the bottom.
Stove Exterior measures 20 x 18 x 39 2/5
Firebox Interior measures 13 1/5 x 11 2/5 x 13 3/5
Weight 287 lbs
Soapstone Top Plate 66 lbs
Stove in soapstone $5,990
In steel, black or gray, oven compartment shelf in soapstone $3,790
In steel, black or gray, with soapstone top plate and oven compartment shelf $4,390
The RAIS Pina is a steel stove, in either black or gray steel, with flat sides and back, and a round front. It has no wood storage space under the firebox so it is mounted on a pipe about 12" - 14" high, which brings the glass door of the combustion chamber up to the desirable level. It is a "New Generation" model. It was awarded AMERICAN HEARTH AND HOME magazine's VESTA award for design.
Its heating capacity is similar to that of the Gabo-wood with an "optimal heat output" of 15.4 kBTU. The Pina can be installed with a turntable but it can be used without one. Indeed, the turntable is an optional accessory. The turntable comprises a pair of fittings, one at the top where the exhaust pipe enters the top of the stove, and the other at the bottom of the stove, which contain rollers to permit the stove to turn while the exhaust pipe at the top and the pipe at the bottom remain still. (Note: Turntables require a three-foot clearance all around.)
The Pina does not have an oven compartment. As with the Gabo-wood, the Pina is only top vented.
Stove Exterior measures 21 3/4 x 16 3/4 x 44 1/8
Firebox Interior measures 14 3/4 x 9 5/8 x 14 1/2
Turn table floor to bottom of stove 12" - 14"
Weight 361 lbs <
Stove black or grey steel $4,260
Turntable and connecting pipe $495
The Gabo looks rather different from other RAIS stoves. It has a convection grate above the combustion chamber, which can be in black or gray steel to match the stove, or in stainless steel. There is no oven shelf. The Gabo is a steel stove, in either black or gray, but a soapstone top plate can be ordered for it. It has flat sides and back and a round front. The Gabo Wood and the Pina are similar in their "optimal heat output" which is 15.4 kBTU. The Gabo is one of the new generation stoves, which are built to the latest technical specifications for the control of air throughout the stove. This level of control enhances the efficiency of combustion, which obviates the need for a shaker grate or an ash pan. Air to the combustion chamber can be manually controlled with a metal tab which protrudes below the door. The door is tightly sealed when closed. The convection grill at the top of the front can be in either of the steel colors to match the stove or in stainless. The Gabo is available only top vented. It can be ordered with a soapstone top plate.
The Gabo Wood can be fitted to a turntable and an air system is available. (Note: Turntables require a three-foot clearance all around.)
Stove Exterior measures 20 1/8 x 18 1/8 x 39 5/8
Firebox Interior measures 14 3/4 x 9 5/8 x 14 1/2
Weight 350 lbs
Soapstone Top Plate 77 lbs
Stove, black or gray steel with same color convection element $3,890
With stainless steel convection element $4,290
Soapstone top plate $690
Turntable and connecting pipe $495
Air system $190
The Gas Gabo is a steel stove in either black or gray. It is built in the same hull as the wood version, so they look alike. As with the wood Gabo, a soapstone top plate is an optional extra. The Gas Gabo may, however, be either rear or top vented.
Optimal heat output is stated in a range 13 20 kBTU because gas flow is controllable. Heat range is assessed at 21 31 kBTU.
Stove exterior 20 x 18 1'8" x 39 13/16
Firebox interior14 3/4 x 9 5/8 x 14 1/2
Weight 302 lbs
Soapstone Top Plate 77 lbs
Stove Black or Grey Steel w/Grey or Black Convection Element $4,110.00
Stainless convection element $410
Soapstone top plate $645
The Topas is a tall 51.2 flat sided, steel stove in black or gray, designed to state-of-the-art combustion and air control technologies, but retaining the familiar oven compartment and wood storage space.
Its optimal heat performance is rated at 17 kBTU. Its heating capacity is 1100.
The Topas has a new two-step door closing system that is designed to permit ash to settle before the door is opened, and to make it more difficult for children to operate.
The stove can be top or rear vented. The air system and turntable are available as an optional extra.
Stove exterior 15.5 x 19.1 x 51.2
Firebox interior 14 1/4 x 15 x 16 1/4
Weight 364 lbs
Stove black or gray steel $4,900
The Opus is a tall 63 flat sided, highly innovative, steel stove, in either black or gray. The space over the combustion chamber can be packed with up to 20 blocks of soapstone to hold heat after the fire has died down. The blocks are an optional extra. They weigh some 220 lbs. The optimal heating performance is rated at 17 kBTU. Its heating capacity is 1100 sq. ft.
The Opus has a new two-step door closing system, designed to permit ashes to settle before the door is opened, and making it harder for children to open.
An air system and turntable are sold as optional equiptment.
Stove exterior 19.5 x 19.1 x 63
Firebox interior 14 1/2 x 15 x 16 1/4
Weight 397 lbs
Stove black or gray steel $5,600
Soapstone blocks $600
The RAIS 60 Insert is a convenient replacement for any open fireplace. An open fireplace replaces the air four times an hour and has an efficiency of only 10%. A RAIS insert can achieve efficiencies up to 70% and better.
RAIS 60 insert is designed to fit into an existing open fireplace or as an insert in a new setting. The RAIS 60 insert fits into most masonry fireplaces and requires a zero clearance firebox for new construction.
Produced to incorporate the highest standards of wood burning technology, the RAIS 60 insert efficiently utilizes the latest in combustion technology. The door is hinged on the left side.
Stove Exterior measures 27 ½ x 17 5/8 x 22 5/8
Firebox Interior measures 20 7/8 x 13 x 13 Ύ
Weight 285 lbs
Price $3,540
Zero-Clerance cabinet $1,590
The RAIS Cube
Not only is the Cube a really nicely proportioned, good looking outdoor grill, but its grill is at a convenient height at about 30, and the bottom of the unit has the typical RAIS wood holding space.
The firebox is separate from the stand and swivels through 360 degrees.
The stove is of corten steel. The grill is stainless steel.
It is 45 7/10 tall, and 15 3/8 wide.
Price $1,110
Not just a grill but also a work of garden art, the RAIS Gizeh, like good wine, becomes more beautiful and interesting with time. The tall and slim pyramid shaped stove is a stunning frame for a fire in the summer evenings with friends and family gathered for a barbecue. After dinner the RAIS Gizeh can be used as an open fireplace, and always as a beautiful garden sculpture. RAIS Gizeh changes appearance with the natural oxidation of the corten steel, which gives it a rusty look. The symbol on the back of the frame is the Arabic sign for Gizeh, meaning tip of the pyramid, and is especially beautiful when the light from the fire shines through.
Falk selected 8 mm (more than Ό") Swedish naval grade steel, rather than cast iron, because steel would be lighter and more malleable than iron. Reduced weight permitted larger units, which allowed greater heat output. Stoves could also be taller, permitting more stove size for the floor space taken up, better viewing of the fire, and a space under the firebox for wood storage. Because steel can be cold-bent and stamped, stoves could be designed with cleaner lines, adding a new dimension to their styling.
