Heating boilers

Heating boilers

To provide heating and comfort in a home, a safe  discharge of flue gases is also important, in addition to a proper installation. Ontop offers flue gas systems that can be easily connected to state-of-the art central heating boilers and hot water boilers. Our products are used from new build to renovation and even in the most modern buildings such as passive houses and zero-energy buildings. Ontop offers a wide range of flue gas systems for all types of boilers: condensing/dry, positive pressure/negative pressure, cascade and combined combustion air and  CLV configurations. Our Metaloterm MF, twin wall insulated flue, Metaloterm UE twin wall flue with air gap, Metaloterm ME single-wall flue and Metaloterm UK as concentric air inlet and flue gas outlet are regularly applied in all kinds of properties. From monumental homes to luxury apartments, from stylish hotels to modern restaurants. 

Some advantages:

  • Rings with condensation and pressure tight sealant
    All products come with silicone sealing rings for condensation and pressure-tight sealing. For specific applications we also deliver EPDM and Viton rings.
  • Reducing Tees for multiple devices
    We offer a wide range of reducing Tees allowing  multiple devices to be connected to a single flue. 
  • Diameter and counter pressure calculations are provided on request
  • Metaloterm UP for increased corrosion resistance
    For boilers that are powered by biofuels Ontop offers