... %, 1, Excellent energy saving: set heat recovery inside, exchange the exhausted air and supply air, recovery efifciency up to 90%,2, runner ... and mechanical belt lock,5,adopt thick aluminium foil and recovery heat with with the height of the bellows being 2. ... 0mm, wide surface area of transferring heat, high heat recovery. ( function(){ var aBigImageSrc = [ 'http://i01.i.aliimg.com ...