The lack of make-up air in a building can cause serious problems. Many times the problems are not even recognized and show themselves in ways that most people do not think about. A properly designed and installed ventilation system provides environmental control by avoiding negative pressure. Uncontrolled infiltration of air through window sashes, doors and walls leads to many undesired results. In this article we will discuss a few of these problems and inform you about the cost of make-up air. Oleg Chechel olegsystems@olegsystems.com CB Blower Co. http://www.cbblower.com http://www.cbblower.com/contact.html
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