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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
Frost Protection Only Required At Extreme Outside Temperatures Of Around -6 °C
Optional smart frost protection
Therefore when you take into consideration the noise level and energy consumption of this fan in relation to its performance then the QuietAir is class leading
'X' suffix models also have powered electric anti-backdraught shutters 251310
Zehnder CK300 Rigid Twin Duct, 2 x 158mm x 69mm x 1.5m AX3504 Frost Protection Only Required AtThe Zehnder CK300 rigid twin duct has an extremely low profile and compact design. It is suitable for use with the Zehnder ComfoTube Flat 51 semi rigid manifolds. The smooth, hygienic twin duct is made for air flows of 83. 3 l s (300 m h) at low pressure drops. It measures 65mm high x 326mm wide x 1500mm long. Zehnder P N 990 322 051 (Old Part No 990 322 020)