You can apply machines available for brushing the floor boards.
Ask if they use vacuum pressure cleaner with HEPA filtration which minimizes the dander that vacuum cleaners usually throw up into the air. http://Cleanbondfinancing.net/__media__/js/netsoltrademark.php?d=Ys-Clean.CO.Kr%2Fbbs%2Fboard.php%3Fbo_table%3Dfree%26wr_id%3D329355