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Serving King County and Snohomish County

Serving King County and Snohomish County


Evergreen State Heat & AC Blog

Why Proper Ventilation for Your Commercial Building Is Vital


When you think about the HVAC system for your commercial building or facility, what comes to mind first? Is it the cooling and heating system? That’s natural, but it only accounts for three of the four letters in “HVAC.” The missing letter is the “V,” ventilation. Ventilation isn’t a standalone part of HVAC. It’s key for helping both the heating and air conditioning. Ventilation also regulates the balance of indoor and outdoor air and regulates humidity levels inside. 

If your commercial facility has poor ventilation, it won’t matter how well the AC and heating work—your business may be in serious trouble, as we’ll explain below. 


If one of the main concerns for your business is ensuring the comfort levels of the people inside the building, then ventilation is extremely important. Often people assume that only climate control is necessary to keep people comfortable. But ventilation and indoor air quality are equally important. In fact, the EPA ranks ventilation as the most important part of maintaining high indoor air quality, and that has a huge impact on comfort: nobody wants to breathe stuffy, pollutant-filled air and suffer from a range of IAQ-related problems likes headaches, nausea, fatigue, lack of concentration, and respiratory problems. 

Protecting equipment

Bad ventilation in a building can be damaging to the precision equipment housed in it. Both dry and humid conditions can be harmful to precision electronic equipment, leading to serious data loss and downtime. Airflow around equipment helps to prevent it from overheating. You can apply the lessons of the server room—which has special ventilation needs—and apply it to the whole building.  

HVAC system health

Poor ventilation is bad for the HVAC system’s other components: it leads to dirt and dust infiltration into the heater and AC, damage from high humidity, and a general increase in stress that will lead to more repairs and possibly an early replacement.

The dangers of mold and mildew

One of the biggest issues that can occur when a building has insufficient ventilation is that stagnant air and high humidity increase the opportunities for mold and mildew to develop. Both are harmful for building material and create foul odors. Worse, certain types of mold release toxic spores into the air that create an unhealthy environment. Mold and mildew are difficult to remove, so it’s best to prevent them in the first place. 

What do you need for better ventilation?

If you’re already reading this blog post, it means you have reasons to believe your commercial ventilation is faulty or was inadequate to begin with. The air quality is low, conditions are stuffy, equipment is malfunctioning, employees and customers are complaining … well, whatever is happening, you want to do something about it. 

This is where our Evergreen State team comes in. We work with improving commercial indoor air quality in Everett, WA through installation, repairs, replacements, and maintenance. We can install IAQ devices, replace faulty parts of the HVAC system, provide air balancing, and any other service you may need to improve your commercial ventilation. 

Evergreen State Heat & AC serves Snohomish County and The Eastside. Call us today—we offer 24/7 on-call dispatching.

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