Metaloterm® UE

The Metaloterm® UE system is a modular twin wall flue system, made of stainless steel with an air gap insulaties and sealing ring.  Metaloterm® UE is suitable for low temperatures, condensing and non- condensing applications with flue gasses in positive or negative pressure. The system is suited for a wide range of applications such as condensing heaters and boilers, gas-fired stoves and ventilation systems.

· Gas fired stoves
· Oil fired stoves
· Industrial ventilation systems
· Air inlet or ventilation system
· Condensing heaters and boilers
· Atmospheric gas-fired boilers

· Universal applicable flue-system
· Compatible with Metaloterm® ME en Metaloterm® MF
· Pressure-tight up to 5000 Pa
· Inner- and outer wall from high quality stainless steel
· Stress free thermal expansion
· Extremely low heat mass maintains draught and allows longer runs of installed flue

Technical characteristics


Chimney/flue system

Operating mode Dry/wet
Pressure Negative pressure (N)/ positive pressure (P/H)
Max. working pressure 5000 Pa
Operating temperature 400 °C (N)
  200 °C (P/H)
Max. temperature allowed 1000 °C (N)
  200 °C (P/H)
Inner wall  
· material AISI 316L/EN 1.4404
· thickness 0.4 mm
Outer wall  
· material AISI 304/EN 1.4301
· thickness 0.4 mm
· type air
· thickness 7.5 mm
Brennstoff Oil/wood/coal/pellets normal (wood)/gas
Sealant Elastomer (in case flue gas temperatures exceed 200°C, sealants as well as the cap and sopor seals have to be removed before installation)
Inner diameter (mm) 80 100 130 150 180 200 250  
Outer diameter (mm) 95 115 145 165 195 215 265  
Cross section (cm2) 50 79 133 177 254 314 491  
Weight (±kg/m) 1,5 2,5 2,5 3,5 4 4 5


Black Matte heat resistant stove paint Ontop code 910





Ontop software

Building blocks (CAD)

Mounting instructions

Mounting heights and distances