ATMOS DC GS boilers utilize the principles of pyrolysis and wood gasification generator and are designed to burn wood as only solid fuel. The boiler body is made of high-quality steel with a thickness of 3-8 mm. Wood gasification boiler ATMOS DC series type GS comprises a chamber intended to store seasoned wood, the lower part of the chamber comes with a ceramic molding with an elongate opening providing the flow of exhaust gases to the afterburn chamber underneath. The lower combustion and ash chamber has a semi-circular ceramic coating. The area of used ceramics in gasifying boilers ATMOS DC GS is greater than in the case of boilers series DC, DC S or SX. ATMOS afterburn combustion chamber in which the pyrolysis gases gather below is also equipped with a ceramic chamber, which spherically surrounds the outer part of the chamber and improves the quality of combustion. In the rear part of the ATMOS DC GS central heating boiler, an exhaust gasses duct is placed in which upper part an ignition valve is located (controlled by a firing safety valve pull rod at the front). The upper part of the exhaust flue duct is connected to an outlet to the chimney.
The boiler ATMOS has many advantages like the possibility of burning large pieces of wood. Higher productivity provides the fact that the primary and secondary air is first heated up by the high temperature before used in the combustion process. Ash removal is easy because of the large and high lower combustion. Service and cleaning of the boiler are very simple as no firetube of the heat exchanger were used. More efficient combustion is provided by the ceramic fitting of the upper and lower combustion chamber. Large storage capacity for wood of the upper chamber and plenty of space for ash in the lower one (in the case of wood ash removal only once a week). The boiler is small and weighs little (when compared to traditional boilers). An exhaust fan (pressure ventilator) which provides dust-free removal of ash and no smoke in the boiler room when loading wood.
Inbuild cooling loop circuit prevents the risk of overheating and damaging the boiler or the central heating installation. ATMOS DC GS wood gasification boiler utilizes a thermostat that automatically switches off the boiler after the combustion of wood is completed.
When choosing a boiler with Laddomat or mixing valve and accumulation tank (buffer tank) as accessories the customer receives a 3-year warranty. Installing a boiler without heat accumulation and Laddomat or mixing valve the given warranty period is 2 years.
ATMOS DC GS central heating boiler in order to achieve the minimum required temperature of the return water at 65 ° C, should be working with a charging unit pump Laddomat or a mixing valve. All boilers are supplied with cooling loop preventing overheating but it is recommended to work in a central heating installation with accumulation tank and Laddomat unit (found in accessories).


| DC15GS | DC20GS | DC25GS | DC32GS | DC40GS | |
| A | 1280 | 1280 | 1280 | 1280 | 1434 |
| B | 670 | 758 | 959 | 959 | 959 |
| C | 678 | 678 | 678 | 678 | 678 |
| D | 950 | 950 | 950 | 950 | 1099 |
| E | 150 (152) | 150 (152) | 150 (152) | 150 (152) | 150 (152) |
| F | 69 | 69 | 69 | 69 | 69 |
| G | 185 | 185 | 185 | 185 | 185 |
| H | 1008 | 1008 | 1008 | 1008 | 1152 |
| CH | 256 | 256 | 256 | 256 | 256 |
| I | 256 | 256 | 256 | 256 | 256 |
| J | 6/4" | 6/4" | 6/4" | 6/4" | 2" |
| Type ATMOS | DC15GS | DC20GS | DC25GS | DC32GS | DC40GS |
| Boiler output (kW) | 15 | 20 | 25 | 32 | 40 |
| Required chimney draught (Pa) | 16 | 20 | 23 | 25 | 25 |
| Boiler weight (kg) | 302 | 343 | 431 | 436 | 485 |
| Water volume (l) | 56 | 64 | 80 | 80 | 90 |
| Fuel container volume (dm3) | 66 | 87 | 125 | 125 | 170 |
| Max. length of wood (mm) | 250 | 330 | 530 | 530 | 530 |
| Typ. consumption in season (m3) | 15 | 19 | 25 | 32 | 40 |
| Required fuel (preffered) | Dry wood with specific energy 5 - 18 MJ/kg, diameter 80 - 150 mm, 12 - 20% water contents | ||||
| Min. return water temperature | 65 °C | ||||
| Efficiency (%) | 91,2 % | >89 % | 88,8 % | 89,3 % | 86,4 % |
| Boiler class ČSN EN 303-5 | 5 | 5 | 5 | 5 | 5 |
| Energy efficiency class | A+ | A+ | A+ | A+ | A+ |
| Power [ kW ] | 32 |
| Power [ kW ] | 25 |
| Power [ kW ] | 20 |
| Power [ kW ] | 15 |
| EcoDesign | YES |
| EcoDesign | YES, wood |
| EcoDesign | wood, YES |
| EcoDesign | YES, wood |
| Class | 5, A+ |
| Class | A+, 5 |
| Class | A+, 5 |
| Class | 4, A+ |
| Weight [ kg ] | 436 |
| Weight [ kg ] | 431 |
| Weight [ kg ] | 343 |
| Weight [ kg ] | 302 |
| Height [ mm ] | 1,280 |
| Height [ mm ] | 1,280 |
| Height [ mm ] | 1,280 |
| Height [ mm ] | 1,280 |
| Width [ mm ] | 678 |
| Width [ mm ] | 678 |
| Width [ mm ] | 678 |
| Width [ mm ] | 678 |
| Depth [ mm ] | 959 |
| Depth [ mm ] | 959 |
| Depth [ mm ] | 758 |
| Depth [ mm ] | 670 |
| Distance from flooring to exhaust gas pipe base [ mm ] | 875 |
| Distance from flooring to exhaust gas pipe base [ mm ] | 875 |
| Distance from flooring to exhaust gas pipe base [ mm ] | 875 |
| Distance from flooring to exhaust gas pipe base [ mm ] | 875 |
| Chamber depth [ mm ] | 530 |
| Chamber depth [ mm ] | 530 |
| Chamber depth [ mm ] | 250 |
| Chamber depth [ mm ] | 330 |
| Water capacity [ L ] | 56 |
| Water capacity [ L ] | 64 |
| Water capacity [ L ] | 80 |
| Water capacity [ L ] | 80 |
| Outlet and inlet supply size [ inch ] | 6⁄4'' |
| Outlet and inlet supply size [ inch ] | 6⁄4'' |
| Outlet and inlet supply size [ inch ] | 6⁄4'' |
| Outlet and inlet supply size [ inch ] | 6⁄4'' |
| Min chimney draft [ Pa ] | 25 |
| Min chimney draft [ Pa ] | 25 |
| Min chimney draft [ Pa ] | 16 |
| Min chimney draft [ Pa ] | 20 |
| Producer's recommended minimum volume of accumulation tanks | 500 L |
| Producer's recommended minimum volume of accumulation tanks | 500 L |
| Producer's recommended minimum volume of accumulation tanks | 500 L |
| Producer's recommended minimum volume of accumulation tanks | 500 L |
| Efficiency [ % ] | 90 |
| Class | 5 |
| Width [ mm ] | 670 |
| Exhaust gas pipe size [ mm ] | 150 |
| Min. working temperature [ °C ] | 65 |
| Ventilator | Extraction |
| Mains voltage [ V ] | 230 |
| Fuel | wood, YES |
| Warranty | 3 years for boiler installed with Laddomat and accumulation tank |
ℹ️ Viewed reviews are moderated. We do not verify that they come from customers who have purchased the product.
The product I have is actually a DC-40-SX purchased 15 years ago. It has supplied 90% of our heat load in a 2200 square foot (I'm in the USA) house in the north midwest (northern Ohio). After all this use, it is still firing up nicely, with the only real maintenance periodic cleaning and somewhat rebuilding the nozzle which became worn after 7 years making the slot too large so the combustion at lower outputs was smoky. And now after 15 years the extraction fan is getting weak. But overall this is one of the best made products I've ever owned. I budgeted it based on hoping for 10 years of performance and I won't be surprised if this makes it to 20 or more. Thank you Atmos designers and workers for such a great and wonderfully "overbuilt" boiler.






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