Questions and Answers

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What can I do if no single fuel form is enough to power my sauna?
Have the stove designed to work with a combination of fuel types so that it has sufficient power.  The Stove Bureau at Furnace Art Engineering is experienced in developing stove designs based on a combination of fuel types.  Every project is unique. Call us to find out what we can do for you.
How long do your stoves retain their heat?
Light steam is guaranteed after one heat-up cycle for up to 48 hours.
Do you carry out heat transfer calculations?

We carry out a heat transfer calculation of the sauna stove and steam room as a matter of course for every stove project we create in order to guarantee that the sauna works as 'a little bit of heaven’. We take a variety of factors into account from the features of the premises to the operating mode, steam volume and intensity of visitor flow. For more details, see our 'Materials and Technologies' page.

How do your stoves differ from those of other manufacturers?
Our stoves outshine the competition in every detail: light steam guaranteed, up to 48 hours steam regime after a single heating cycle, inbuilt steam room ventilation system, minimum 20-year stove life-cycle, highly efficient and environmentally friendly, unique design in response to every individual steam room, highest quality materials and craftsmanship. Every stove we create is a work of art and a triumph of engineering.
Is the sauna stove easy to use?
 In all Furnace Art Engineering's sauna stoves, the ventilation system can be controlled with the movement of one hand (patent).
How does the ventilation system work?
The air which has become saturated with vapours is extracted out of the steam room from beneath the stove. Fresh air from outside is warmed before it enters the breathing zone. The stove provides an air change rate of 4 and the intensity is adjustable. The ventilation system is neat, continual and works without requiring the guests to leave the steam room. 
Why does the steam room need to be ventilated?
Naturally the guests using the steam room sweat and so if there's no ventilation, the air quite quickly becomes unbreathable. This is particularly important in a commercial sauna. Our stoves have a built-in capacity to ventilate the steam room evenly and continually. The ventilation rate is adjustable.
How long will a sauna stove last?
Typical sauna stoves last for five years or 2-3 years under commercial exploitation and then they need repair, sometimes a major overhaul. Our stoves have a life cycle of more than 20 years. If anyone other than Furnace Art Engineering claims that their stoves do the same, just ask them to demonstrate the stove. You can read more about the exceptional durability of our stoves on our Materials and Technologies page.
What is better, an open or closed stone stove? What's the advantage of having a closed stone sauna stove?
 In a closed stone, sauna stove, the core can be heated until it glows red-hot and so it will retain the heat for up to 48 hours - considerably longer than in a stove with an exposed core. We only use the open stove design in 'black-style' saunas. In a 'black-style' sauna, the core will only produce light steam for up to three hours. When an open stove is installed in a 'white-style' sauna, it is basically the type of heater we have nicknamed a metal 'misconception'. We don't make them.
What is the difference between a stove used for noncommercial and commercial exploitation?
It’s basically down to power, size and volume. The construction of a commercial sauna stove is more substantial and is designed to sustain daily operation. The stove core has a greater mass and its components are laid slightly differently. Sauna stones aren’t used in very large commercial stoves. The stove finish is more practical and utilitarian in design. For more information, see the Gas-fuelled Sauna Stoves page in the Commercial Sauna Stoves section of our website
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