
Manufacturer of wood gasification, pellet and wood chip boilers as well as system components for wood-based heating technology
HDG Kessel- und Apparatebau GmbH
Massing (DE) · Zöbern (AT)New on Amplifa
About HDG Bavaria
HDG Kessel- und Apparatebau GmbH, based in Massing (Bavaria), develops and produces log wood boilers (wood gasification boilers), wood chip boilers, pellet boilers and combination boilers as well as associated system components such as buffer tanks, domestic hot water tanks, fresh water stations, solar collectors and heating boxes; the portfolio is complemented by fine dust separators and an air-to-water heat pump. Production takes place at the headquarters in Massing using quality steel sheet, stainless steel and stainless steel castings; refractory concrete as well as cast iron and high-temperature-resistant special alloys are used for combustion chamber linings. The company was founded in 1922 as a metalworking shop and continued in 1978 as HDG Kessel- und Apparatebau GmbH, after heating boilers had been produced under the ACKMATHERM brand from 1970 onwards. Customers include private households, agriculture and forestry, commercial businesses, municipalities and wood processing companies; sales are handled through a network of specialized trade installers in Germany, Austria, France and internationally.
- Site
- Massing
- Processes
- Manufacture of wood gasification boilers (log wood boilers), Manufacture of pellet boilers (condensing technology), Manufacture of wood chip boilers and combination boilers (log wood/pellet, log wood/oil), Manufacture of system components (buffer tanks, domestic hot water tanks, fresh water station,, Metalworking and plumbing work, Customer service / factory customer service, Spare parts service, Maintenance contract
- Materials
- Quality steel sheet, Stainless steel castings, Stainless steel, Refractory concrete, Cast iron, High-temperature-resistant special casting, Pellets A1 (DIN EN ISO 17225-2), Stainless steel casting
- Certificates
- Type testing DIN EN 303-5 (wood boilers), Certification according to European Pressure Equipment Directive 97/23/EC, Type testing DIN EN 303-5, European Pressure Equipment Directive 97/23/EC, myCare5 warranty and service package
- Founded
- 1978 (HDG
- Industries
- Private households (single- and multi-family homes), Agriculture and forestry, Commercial businesses, Municipalities, Wood processing companies, Private households (single-family homes, multi-family homes)
- 01
Development and design of boiler technology
- 02
Sheet metal working and metalworking (steel, stainless steel)
- 03
Manufacture of combustion chambers (stainless steel castings, refractory
- 04
Assembly of boilers and system components
- 05
Testing and type testing (DIN EN 303-5)
- 06
Distribution via specialized trade installers as well as customer service and
Materials and Processes
Quality steel sheet
Material for boiler bodies and apparatus construction of the log wood and wood chip boilers.
Stainless steel casting
Used for heat-stressed boiler components, among others in the log wood boiler HDG F.
Stainless steel
Material for the pellet boilers of the condensing series HDG K10-33.
Refractory concrete
Lining of the combustion chamber for high combustion temperatures.
Cast iron
Used as a material in the log wood boiler HDG Euro.
High-temperature-resistant special casting
For thermally highly stressed components in the log wood boiler HDG H.
Locations
Massing
DEHeadquarters and production
- Materials
- Quality steel sheet, stainless steel, stainless steel castings, cast iron, refractory concrete
Zöbern
ATAustrian branch office
Products



Inside the production



Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of wood gasification boilers (log wood boilers)Assembly | – | – | – | – | Quality steel sheet, Stainless steel castings, Refractory concrete, Cast iron |
| Manufacture of pellet boilers (condensing technology)Assembly | – | – | – | – | Stainless steel |
| Manufacture of wood chip boilers and combination boilers (log wood/pellet, log wood/oil)Assembly | – | – | – | – | Steel, Stainless steel |
| Manufacture of system components (buffer tanks, domestic hot water tanks, fresh water station,Assembly | – | – | – | – | – |
| Metalworking and plumbing workJoining | – | – | – | – | – |
Additional services
Reference customers
Quality
The boilers are type-tested according to DIN EN 303-5 and certified under the European Pressure Equipment Directive 97/23/EC; via myCare5, five years of warranty including online service are offered.
| Evidence | Massing |
|---|---|
| Type testing DIN EN 303-5 | |
| European Pressure Equipment Directive 97/23/EC | |
| myCare5 warranty and service package |
History
- 1922
Josef Ackermann and Stefan Laxhuber found a company in Massing for metalworking and plumbing work as well as the construction of wind wells.
- 1936
First own workshop on the market square of Massing.
- 1970
Production of heating boilers for oil, gas and solid fuels under the name ACKMATHERM.
- 1977
Patent for smoke-free combustion; the 'Bavaria' boiler is developed to production maturity.
- 1978
Founding of HDG Kessel- und Apparatebau GmbH; construction of a 2,600 m² production hall.
- 1990
Eva Ackermann, daughter of the company founders Karl and Therese Ackermann, joins the company.
- 1995
Company founder Karl Ackermann receives an award.