![](https://www.almeva.swiss/sites/default/files/perm/image/plastove_kominy_1920x400.jpg) 1. [ Home ](/en-gb) 2. Plastic gas flue systems # Plastic gas flue systems ## Modern gas flue extraction systems for condensing and low-temperature boilers with a maximum flue gas temperature at the appliance throat of 120°C. It is currently designed for the flue gas path from appliances burning gaseous fuels or natural gas (L, H) and liquid fuels (LTO with sulphur content ≤ 0.2%, kerosene). The material of the pipes and fittings is polypropylene homopolymer, which excels in chemical resistance to acids, alkalis and weak solvents. The individual joints are sealed with EPDM rings. Smoke extraction systems ## One-layer gas flue systems [ ![flex zihane](https://www.almeva.swiss/sites/default/files/perm/image/kominove_systemy_313x600_se_zihanym_pozadim_flex.jpg) #### Almeva FLEX The FLEX single-layer plastic smoke evacuation system consists of flexible hoses, fittings and accessories. It is especially designed for the insertion of straight and angled chimney flues. The individual elements of the FLEX system are connected by means of bayonet socket joints with a sleeve and an EPDM seal. --- Smokestack: - Inner monolayer Boiler: - Condensing boiler ](/en-gb/products/flex-pph) [ ![star zihane](https://www.almeva.swiss/sites/default/files/perm/image/kominove_systemy_313x600_se_zihanym_pozadim_starr.jpg) #### Almeva STARR Single layer plastic STARR smoke extraction system consisting of fixed pipes, fittings and PPH accessories. It is designed especially for interior use and for the insertion of straight chimney flues. The individual elements of the STARR system are connected by socket joints with four-part EPDM seals. --- Smokestack: - Inner monolayer Boiler: - Condensing boiler ](/en-gb/products/starr-pph) Smoke extraction systems ## Concentric air-gas flue systems [ ![](https://www.almeva.swiss/sites/default/files/perm/image/kominove_systemy_313x600_se_zihanym_pozadim_lab.jpg) #### LAB / LAL / LAM / LAC The plastic smoke evacuation system consists of concentric PPH solid pipes and fittings — high polished stainless steel, stainless steel comaxitated white sheet, matt stainless steel and stainless steel with non-galvanized copper coating. It is especially designed for flue gas ducts in outdoor environments. The individual elements of the system are connected by conical joints. --- Smokestack: - Concentric Boiler: - Condensing boiler ](/en-gb/products/lab-lal-lam-lac) [ ![lik lil zihane](https://www.almeva.swiss/sites/default/files/perm/image/kominove_systemy_313x600_se_zihanym_pozadim_lik_lil.jpg) #### LIL / LIB The LIL and LIB smoke evacuation system consists of concentric fixed pipes and fittings PPH/​stainless steel high polished or stainless steel white comaxit. They are mainly designed for flue gas ducts in indoor environments. The connection of the individual elements of the system is by socket joints with EPDM seals. --- Smokestack: - Concentric Boiler: - Condensing boiler ](/en-gb/products/lil-lib-pph) [ ![lik lil zihane](https://www.almeva.swiss/sites/default/files/perm/image/kominove_systemy_313x600_se_zihanym_pozadim_lik_lil.jpg) #### LIK The LIK plastic smoke extraction system consists of concentric fixed pipes and PPH/PPH fittings. It is designed especially for flue gas ducts in indoor environments. The connection of the individual elements of the system is by means of socket joints with EPDM seals. --- Smokestack: - Concentric Boiler: - Condensing boiler ](/en-gb/products/lik-pph) Smoke extraction systems ## Gas flue systems for multiple connected appliances [ ![las zihane](https://www.almeva.swiss/sites/default/files/perm/image/kominove_systemy_313x600_se_zihanym_pozadim_las.jpg) #### LAS The LAS plastic smoke evacuation system consists of fixed pipes, fittings with 87° branches and accessories PPH, PPH/​stainless steel — highly polished, white comaxite. The system is offered as a single layer in diameters from 60 mm to 315 mm or as concentric in diameters from 60/100 mm to 200/300 mm. It is especially designed for connecting multiple appliances to a common chimney in indoor or outdoor environments. --- Smokestack: - Systems for multiple connected appliances Boiler: - Condensing boiler ](/en-gb/products/las) [ ![cas zihane](https://www.almeva.swiss/sites/default/files/perm/image/kominove_systemy_313x600_se_zihanym_pozadim_cas.jpg) #### CAS The CAS plastic smoke evacuation system consists of fixed pipes, fittings with 45°, 87° branches and PPH accessories. The system is offered as a single layer system in diameters from 60 mm to 315 mm and as a concentric system with a white coated stainless steel jacket in diameters from 110/160 mm to 200/300 mm. It is particularly suitable for cascades in indoor environments. --- Smokestack: - Systems for multiple connected appliances Boiler: - Condensing boiler ](/en-gb/products/cas-pph) #### Parameters and advantages - for condensing boilers, stoves and furnaces - perfect flue gas flow - low risk of fouling - excellent tightness, strength and flexibility of the joint #### Downloads - [Company profile ](https://www.almeva.swiss/sites/default/files/perm/document/almeva_company_profile_7_2024.pdf) - [Catalogue Plastic gas flue systems EN / DE / ES / TUR / GR](https://www.almeva.swiss/sites/default/files/perm/document/catalogue_pph_2023_en_de_esp_tur_gr.pdf) ## References for plastic flue systems [ ![](https://www.almeva.swiss/sites/default/files/perm/image/malbork_hrad_pl_wide_0.jpg) #### Malbork Castle, Poland — installation of the LAB concentric system ](/en-gb/references/malbork-castle-poland-installation-lab-concentric-system)