Technical Catalogue
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Air Comfort Technical Catalogue > ROOFMASTER STEC

Fläkt Woods Specifications are subject of alteration without further notice

ROOFMASTER STEC Features 5 sizes • • • • • • Volume flow up to 1.7 m3/s (6100 m3/h) EC-motor with integrated speed control Insulated casing Low sound level High efficiency ErP 2015 compliant Electrical supply 1x 230 V 50/60 Hz (sizes 1-2) 3x400 V 50Hz (sizes 3-5) Ambient temperature range • -20°C…+50 °C ( see size by size) Product Code - STEC-a-bbb-c-d-e The fan casing is made of black pre-painted galvanized sheet or aluminium and zinc coated sheet steel. The surface treatment meets the requirements of environmental class C4 (EN ISO 1294-2). The fan is insulated inside against noise. The...

Performance Data ROOFMASTER STEC Performance table Air flow m3/h as function of static pressure Pressure (Pa) STEC size Air flow m3/s as function of static pressure Pressure (Pa) STEC size Fläkt Woods Specifications are subject of alteration without further notice

General description Applications STEC will comply with new Regulations for roof fans. STEC roof fans are used as exhaust fans in comfort systems where low energy consumption, low noise level and demand controlled ventilation (DCV) are required. They can be used also in industrial applications where the air is slightly greasy or polluted. STEC can be equipped with an air flow measurement device FLOW for easy and accurate measurement of air flow. With Centrimeter the actual air flow can be seen directly from the fan and the 0-10V can be sent to any control device. The inside of the fan casing...

Fan chart-explanation and definitions Symbols Specification text A high efficiency roof fan equipped with an impeller with custom shaped blades and a rotating diffuser. The Permanent magnet motor is supplied with integrated/separate pre-mounted rotation speed controller. Sizes 1 and 2 have an EC motor with integrated control and plastic impeller. The fan can be controlled with a 0...10 V control signal or alteratively 1 or 2 stepless fixed speed values can be set. The fan casing and the side plates of the motor compartment are soundproof. The outer casing of the fan is made of either...

The total A-weighted sound power level to surroundings, LwA, can be read in the fan chart. The correction coefficients by octave bands can be read in the chart below. The sound power level by octave band to the duct or to the surroundings (without A-weighting) can be obtained by using the following formula. Lwoct = LwA + Koct Sound pressure level and remote attenuation Distance L (m) The total sound pressure level to surroundings at different distances can be estimated using the following formula: LpA = LwA - ∆L Sound data Correction Koct (dB) Octave band mid-frequency (Hz) SoundPoint Motor...

Sound data The total A-weighted sound power level to surroundings, Lw^, can be read in the fan chart. The correction coefficients by octave bands can be read in the chart below. The sound power level by octave band to the duct or to the surroundings (without A-weighting) can be obtained by using Sound pressure level and remote attenuation The total sound pressure level to surroundings at different distances can be estimated using the following formula: Sound data Octave band mid-frequency [Hz] Motor data Motor nominal data at 50 Hz Type Supply voltage Power Max current Speed Speed fan range...

Sound data The total A-weighted sound power level to surroundings, Lw^, can be read in the fan chart. The correction coefficients by octave bands can be read in the chart below. The sound power level by octave band to the duct or to the surroundings (without A-weighting) can be obtained by using Sound pressure level and remote attenuation The total sound pressure level to surroundings at different distances can be estimated using the following formula: Sound data Octave band mid-frequency [Hz] Motor data Motor nominal data at 50 Hz Supply voltage Consecutive number sheet metal, black 2= Al/...

Sound data The total A-weighted sound power level to surroundings, Lw^, can be read in the fan chart. The correction coefficients by octave bands can be read in the chart below. The sound power level by octave band to the duct or to the surroundings (without A-weighting) can be obtained by using Sound pressure level and remote attenuation The total sound pressure level to surroundings at different distances can be estimated using the following formula: Sound data Octave band mid-frequency [Hz] Motor data Motor nominal data at 50 Hz Supply voltage Consecutive number sheet metal, black 2= Al/...

Sound data The total A-weighted sound power level to surroundings, Lw^, can be read in the fan chart. The correction coefficients by octave bands can be read in the chart below. The sound power level by octave band to the duct or to the surroundings (without A-weighting) can be obtained by using Sound pressure level and remote attenuation The total sound pressure level to surroundings at different distances can be estimated using the following formula: Sound data Octave band mid-frequency [Hz] Motor data Motor nominal data at 50 Hz x o i it Power Max current Speed Max frequency JyPe Supply...

ROOFMASTER Accessories

Accessories BOGA roof curb with 50 mm insulation The BOGA consists of a sheet steel duct, insulated on the inside with 50 mm thick mineral wool mat. The insulation is backed with perforated sheet metal. The duct is equipped with two cable glands and one built-in cable conduit which can accommodate two cables for electrical connection to the power roof ventilator. Adjustable mounting brackets, which can be set to suit the pitch of the roof, are fitted to the outside of the roof duct. The roof fan is secured by means of four screws through holes in the sides of the base plate. The BOGA is...

BOGA roof curb with 50 mm insulation, for size 190 For BOGA-005 please see general text on previous page. Dimensions in the drawing. BOGA-005 is secured by four screws directly from above. Flat roof socket STEZ-01 The roof socket STEZ-01 is made of corrosion resistant fibre glass. It is designed for mounting on flat roofs or roof s with a maximum pitch of 15 °. For saddle roofs a BOGA roof duct is available. The roof socket is equipped with a connection flange according to DIN 24154, part 1. The roof is secured to the flat roof socket by means of 4 screws. The flexible connection STEZ-02 is...