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It is a single speed
ONLY 14dB(A)
'X' suffix models also have powered electric anti-backdraught shutters 251310
powder coated steel D- Rings a detachable rubber handle
Its SMARTer beacause in contrast to traditional timers
Airflow Airflex ISO Pipe 160mm Diameter 950mm Long house-size-250-299 It is a single speedPre insulated one piece Quick and easy assembly Tough, durable, anti static EPP Fire retardant to B2 Avoids condensation build up Sound absorbing, smooth bore pipe Choice of components to suit any layout Specifications Thickness: 15 mm Material density: 60g dm3, antistatic Thermal conductivity: 0. 042 W mK Application range: 25 C to +80 C Elasticity: 30% DIN 52612