Square

It is possible to have either square ducting or rectangular ducting. We use square ducting exclusively when we specify Extract (or negative pressure) ducting. In both overpressure and negative pressure the square duct is held in shape by a rail at each corner and a system of braces and threaded bar. For more information, please visit our website ? www.prihoda.co.uk or alternatively you can call us on - 0121 320 2496