System boilers

System boilers

ATAG supply SEDBUK A Rated  wall mounted condensing system boilers  from 20kW to 60kW with modulation range down to 16%. All models have multiple flue options including flexible flue liners.Over pressure flue sytems allow for cascaded boilers to operate on smaller diameter runs over a greater distances.

ATAG system boilers have a built in energy management system for weather dependant controls and optimum start by installing an outside sensor.


  • Q series boilers have a built in fully modulating pump for maximum temperature control.
  • Can be cascaded up to 8 modules, MAD Q controllers can be fitted to cascade up to eight  boilers and control up to 3 heating zones and 1 dhw circuit
  • Hydraulic header systems are available for speedy neat installations.


A Series SEDBUK A rated wall mounted condensing system boilers  have a modulating pump with the exception of the A 200 SOV open vent model

Control options, Volt free, 230Volt or OpenTherm.

ATAG also supply a range of stainless steel high recovery cylinders. See Domestic hot water Cylinders. Direct , Indirect and Twin coil

ATAG Heating UK Ltd

3 Juniper West. Fenton Way

Southfields Business Park

Basildon Essex SS15 6SJ.

Tel:044 (0)1268 546700