ID 156801653 © Konstantin0000 | Megapixl.com
Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
air background bacteria building canteen care ceiling cleaning closeup cold condition conditioner conditioners conditioning construction cool cooling copd dirty distribution duct dust factory fresh grill health heat hole home industrial industry infection interior maintenance metal office pipe pipeline piping pneumonia pneumoniae respiratory silver streptococcus system technology tube tuberculosis vent ventilation