Ahrens, in a nutshell

• Ahrens builds and renovates chimneys end‑to‑end—from smart retrofits to new stacks and the right accessories—so your heating and exhaust systems stay safe, reliable, and energy‑efficient. They serve homes, businesses, and industry with solutions tailored to each site. (ahrens.at)

• They combine decades of experience with in‑house systems and certified methods, so projects run smoothly and compliance is easier to prove. (ahrens.at)

What Ahrens actually does for you

• New chimney construction: Double‑walled stainless‑steel systems, multi‑layer ceramic systems (standard and over‑pressure types), and even prefabricated, floor‑high chimneys that drop in by crane to cut site time. (ahrens.at)

• Chimney and flue renovation: Ceramic (ASIS 2000 FU), stainless steel, and plastic (PP/PVDF) liners sized to your appliances and building. They also do interior sealing for tightness, hydraulic milling when the flue is too narrow, and head rebuilds. (ahrens.at)

• Historic and exposed stacks: Careful restoration of old or listed chimneys, including selective dismantling and rebuild of damaged masonry and caps. (ahrens.at)

• Accessories and upgrades: Draft aids, caps, cleaning doors, and condensate solutions that keep performance stable and maintenance predictable. (ahrens.at)

The tech that really helps

• ASIS 2000 FU ceramic system: A thin‑wall ceramic liner with a unique 6 cm compression sleeve that’s condensate‑tight, acid‑resistant, over‑pressure capable, and soot‑fire resistant (W3G)—ideal for today’s gas, oil, and solid‑fuel appliances. Its moisture‑tolerant design protects insulation without rear ventilation. (ahrens.at)

• LAF and ALL‑IN‑ONE multi‑energy chimneys: A future‑proof, room‑sealed air/flue concept that lets you combine fuels (wood/pellets, fossil, plus solar integration) and switch later without rebuilding the stack. Great for energy‑mix strategies and blower‑door‑friendly buildings. (ahrens.at)

• Prefabricated floor‑high chimneys: Factory‑prepared elements with openings and tops pre‑installed; crane‑set in lengths up to ~7.5 m, assembled dry—so installation is fast, safe, and less weather‑sensitive. (ikz.de)

• Advanced relining options: Where geometry is tricky, Ahrens also works with composite liners through certified partnerships, expanding material choices beyond metal and ceramic. (furanflex.com)

Why this is great for your Back Office

• Predictable budgets and fewer surprises: Standardized systems and clear scopes make costs easier to plan, while prefabrication shortens install windows and reduces coordination overhead. (ahrens.at)

• Compliance without the headache: W3G‑rated and over‑pressure‑tested solutions come with proper documentation and type plates, helping you breeze through approvals, audits, and insurer checks. (ahrens.at)

• Less downtime, smoother operations: Clean, fast installs mean fewer tenant or production disruptions—and less reactive maintenance later. (ikz.de)

• Better lifetime economics: Stable draft and moisture‑tolerant designs support efficiency and extend service life, which helps keep OPEX in line. (ahrens.at)

• Clear handover for records: A single accountable partner from planning to commissioning, with a tidy handover package that supports asset registers, CMMS entries, and warranty tracking. (ahrens.at)

How Ahrens works with you

• Discover and plan: On‑site assessment, correct sizing, and a written plan that spells out scope, schedule, and cost drivers—so stakeholders stay aligned. (ahrens.at)

• Engineer and size: Diameters, materials, and accessories matched to current loads and possible future upgrades (including room‑sealed appliances and solar tie‑ins). (ahrens.at)

• Install and certify: Professional, dust‑controlled work, functional testing, and documentation for authorities and insurers. (ahrens.at)

• Maintain and optimize: Scheduled inspections, cleanings, and targeted upgrades to keep performance high and risks low. (ahrens.at)

Where Ahrens fits best

• Residential portfolios: Standardized upgrades across multi‑unit buildings for safety, cleaner operation, and fewer service calls. (ahrens.at)

• Commercial sites: Code‑compliant exhaust for boilers, kitchens, and specialty processes—with reliable draft and easy service access. (ahrens.at)

• Industrial facilities: Durable stacks and liners sized for tough duty cycles, with corrosion and condensate management baked in. (ahrens.at)

Proof of experience

• 40+ years in Austria with ongoing product innovation and sustainability focus, including the ALL‑IN‑ONE concept. (ahrens.at)

• Repeatedly referenced as market leader in chimney renovation, supported by a nationwide presence and long track record. (ahrens.at)

The bottom line

• If you want safer buildings, fewer moisture and fire risks, and cleaner paperwork, Ahrens gives you a robust chimney/exhaust setup that supports a solid Back Office: clearer compliance, smoother workflows, and predictable operating costs—so you can focus on the core business with confidence. (ahrens.at)