Thision® S Plus

The THISION® S Plus range of wall mounted gas fired condensing boilers provide the highest levels of seasonal efficiency, a low environmental impact and lifelong reliability. The range includes 3 units with heat outputs at 33.6kW, 44.9kw and 52.9kW @ 80/60°C.

The stainless steel heat exchanger is constructed using multi-pipes with generous wall thickness for strength and durability. These are configured in such a way to return the highest levels of efficiencies and are spaced to optimise flue gas temperature zones to ensure extremely low NOx and CO emissions for protection of the environment.

View Terms and Conditions.

  • In-built energy saving pump for improved efficiencies
  • Outside air sensor (QAC 34) included allowing weather variable flow temperatures to be delivered to the heating system
  • DHW sensor (QAZ 36) included as standard
  • Extensive flue lengths over considerable distances thanks to an over-pressure of 90 Pa
  • Turndown ratio up to 6:1
  • Stainless steel heat exchanger for lifetime efficiencies
  • Down-firing ceramic burner
  • Extremely low NOx emissions
  • 10 year guarantee with service plan uptake
Model 344654
Nominal heat output 80/60°CkW4.9-33.68.8-44.98.8-52.9
Nominal heat output 40/30°CkW5.3-36.39.8-48.79.8-57.3
Nominal heat input (net)kW37.9550.9459.93
Energy efficiency [1] ErP-RadiatorA/A+A/A+A/A+
Sound power leveldB(A)515051
Boiler seasonal efficiency%96.4296.5196.51
NOx emission @ 0% O2 mg/kWh22.0616.0421.06

1 Energy efficiency class ErP-Radiator (space heating): Product/System according to Directive 2010/30/EU and Regulation (EU) 811/2013