DECADES OF EXPERIENCE
Paul Ahrens first applied his imagination to the development
of new masonry chimney technology in 1924. Since that start, nearly
75 years ago, the family owned company has grown to become the largest
manufacturer of chimney components and relining systems in Europe.
Today AHRENS has many locations in Germany,
Austria, Switzerland and the United States that have installed over
1,000,000 chimney systems. In addition to having developed leading
technology in chimney reconstruction, AHRENS has become the major
manufacturer of concrete chimney accessories.
Seven decades of AHRENS research and
development have produced a complete chimney product line that reflects
the German attention to detail, simplicity of application and insistence
We have a knowledgeable staff on hand, waiting to
analyze your situation and help you arrive at the best solution possible
without obligation. We'll make sure you get our full support from
the planning process through installation.
AHRENS has available the following
professional evaluation and consultation services :
- Video Inspections
- Computer Sizing Analysis
- Specification Assistance
- Special Mix Design
- Steel Reinforcement Design
The AHRENS U.L. Listed product is for low heat type
chimneys with a maximum continuous appliance outlet flue gas temperature
of 1000 F. (538 C.) listed in Column I & II of the NFPA 211 Chimney
Appliances such as but not limited to
Other Applications :
- Residential Heating Appliances
- Commercial Heating Appliances
- Steam Boilers
- Dual Fuel Appliances
- High Temp-to 3000 F. (Special
Material) NFPA 211 Column III, IV & V
- Historical Projects with
specially designed mixes
- Seismic & hurricane reinforcing
- Vertical shaft repair (Non-Chimney)
NEED FOR REPAIR
As masonry chimneys age, the elements take their toll.
If caught in time, the exterior of the chimney can usually be preserved
by using techniques such as tuckpointing.
But, perhaps the worst enemy of masonry
chimneys is the deterioration from within. Acidic condensation created
in the combustion process can cause chimney damage that is not always
visible until it is too late. Airborne pollutants can combine with
the natural by-products of combustion to form these acidic and corrosive
exhausts which "eat" away at the masonry.
As outdated heating systems are replaced
by newer, more efficient systems, the problem is multiplied. Venting
higher efficiency units into large unlined chimneys produces more
acidic condensation and increases damage caused by freeze/thaw cycles.
The alternative for large oversized flues is to increase the amount
of heat that goes up the chimney so condensation does not occur. This
alternative naturally has a negative effect on appliance efficiency
and cannot be considered.
Regardless of the cause, if this deterioration
is ignored, there will eventually be only one solution, tearing the
chimney down and rebuilding. AHRENS offers a better approach!
AHRENS Chimney Technique is a unique two liner system
for lining or relining masonry chimneys installed only by trained
authorized AHRENS dealers. In chimneys old and new the AHRENS system
will provide the following benefits regardless of the type of fuel
- Properly sizes the flue to the
- Improves appliance efficiency
- Insulates the chimney
- Reduces and controls condensation
- Repairs interior deterioration
- Structurally strengthens