When you think about indoor air quality problems for your commercial facility, your mind probably goes directly to contaminants circulating through the ventilation system or various indoor pollutants. But one of the biggest issues for commercial indoor air quality is negative air pressure.
The simple definition of negative air pressure is that it’s when the air pressure inside the building is lower than the pressure outside the building. This often happens in commercial and industrial facilities because of over insulation designed to improve energy efficiency. If not enough outdoor air can enter because of the strong heat-sealing, the indoor pressure will be lower than the outside. Negative air pressure can also happen because of poorly constructed or damaged ventilation systems or malfunctioning equipment that draws on too much air inside the space.
Negative air pressure inside a building creates problems for both homes and commercial/industrial facilities. The simple description of negative air pressure is that it is when the air pressure inside a building is lower than the air pressure outside it. 
Proper ventilation for a commercial facility is essential, regardless of the type of facility. Ventilating a space is required to allow for proper humidity balance (which can make or break process for many businesses), healthy conditions for workers and employees, control of mold and mildew issues, mitigation of allergens, and reduction of dust and other contaminants that can cause damage to machinery.
During winter weather, concerns about the air quality inside commercial and industrial buildings is higher than at any other time of the year—especially in a place like Toronto, where the temperatures stay below freezing for most of the season. Fresh air circulation in a building simply doesn’t happen during cold weather when an indoor facility must be sealed off from the outside, so matter the type of facility.
We offer numerous 
We are proud of the large number of services we provide commercial and industrial companies in the Greater Toronto Area. We’re a heating, cooling, and ventilation contractor, but people often overlook the “ventilation” part—the “V” in HVAC. The truth is that while maintaining the proper level of temperature inside your commercial or industrial facility is essential for continued operation—it not only offers comfort for people, it’s often vital for the proper protection of equipment as well as process—the indoor air quality is also essential. As with heating and cooling, it affects people, equipment, and process. Our technicians are experienced with handling the many ventilation needs of buildings for the 