S&P CTHB / CTHT represent a range of centrifugal roof mounted fans in horizontal discharge format, designed for smoke extraction in fire conditions and certified F400-120 ( except 180 and 200 models). Suitable for air stream temperature up to 120ºC. Base manufactured from galvanised sheet steel. The fans are equipped with high efficiency centrifugal backward curved impeller, manufactured from galvanized sheet steel and the fans have a cowl, manufactured from spun aluminum. All models incorporate bird-proof guard. Available, depending on the model, in 4, 6 or 4/8 poles. The motor is equipped with thermal protection against overheating. 180N, 200N and 225N models are specially designed for extracting smokes from fireplaces. Three-phase 2-speed motor 380-450V 50Hz, 6/12 poles (from 450N to 710H) on demand.

Models from 180N to 400N
– Single-phase, single-speed motor 220- 240V50Hz, IP55, insulation class F, with safety thermal overload protection*. Speed controllable by voltage**.
– Three-phase single-speed motor 220-240/400-415V-50Hz, IP55, insulation class F, with safety thermal overload protection*. Speed controllable by frequency inverter and by voltage**.
– Three-phase 2-speed motor 380- 4150V50Hz, 4/8 poles, IP55, insulation class F, with safety thermal overload protection*.
Models from 450N to 630N
– Three-phase single-speed motor 220-240/400-415V-50Hz, IP55, insulation class F. Speed controllable by frequency inverter*.
– Three-phase 2-speed motor 380- 4150V50Hz, 4/8 poles (only 450N), IP55, class F.
Model 630H, 710N and 710H
– Three-phase single-speed motor 400-415V-50Hz, IP55, class F. Speed controllable by frequency inverter*.

* When thermal protection are connected, the electrical installation must be equipped with a security system that, in case of fire, allows the maximum speed of the fans whatever the current state of the thermal protection.
** When using a speed controller, the electrical installation must be equipped with a security system that allows, in case of fire, the maximum speed of the fans.