With the winter season and cold weather at a close, we turn our attention to the warmer spring months and the cooling of our buildings. This change of seasons can bring about new challenges for a building and owners may be concerned if their Heating, Ventilation, and Air Conditioning (HVAC) system is providing a safe environment and staying cost-effective. Although these are concerns throughout the year, you may be wondering how the warmer weather will impact your building and if it is time to evaluate your current HVAC system. There are many “Things to Consider” when it comes to warmer weather and once you understand what is affecting your building, you can approach solutions to make them better. Read on to learn about some strategies you can invest in to make your building healthier and more cost-effective during the spring.
At this time of year, plants begin to bloom and there tends to be large quantities of pollen in the air, which can reduce the overall outside air quality. This air can make its way to your mechanical equipment, and eventually to the inside of your building, which may adversely affect occupants. To combat this issue, it is highly recommended to change air handling unit filters more frequently and possibly consider filters with a higher Minimum Efficiency Reporting Value (MERV) rating. This rating specifies the ability of a filter to capture air contaminants/particles (including pollen) and a higher rating will help capture more. However, the air filters should be checked more frequently and replaced if needed due to the pollen accumulation.
Beyond the health implications, spring also gives way to changes in the energy demands of a building. Like the fall, the spring months have milder outside temperatures and humidity, lowering the energy demand required to maintain comfortable spaces. Rather than working against extreme heat losses (or gains) caused by the winter (or summer), your HVAC system may deal only with the heat gains caused by sources from the sun’s radiant heat, lights, and people. These heat gains still require cooling, but many times during the spring, the outside air conditions are cooler than the supply air from the HVAC system. Therefore, instead of wasting energy to mechanically cool air, an economizer can be used to condition your space. An economizer will allow your system to supply outside air directly to your building, thereby reducing or eliminating the need to use energy to cool your supply air. This is typically referred to as “free cooling” and can greatly reduce your energy consumption and costs.
In addition to being more cost-effective, economizers are inherently meant to bring in more outside air to your building and will help increase the indoor air quality – just remember those air filters! Although this equipment can provide significant cost savings after it is installed, it can be more complicated to integrate into an existing building design. Using the economizer strategy must be carefully thought out and designed to make sure that the system is running properly and efficiently.
You may not know where to start with improving indoor air quality or decreasing the energy consumption of your commercial space. Many factors and variables can affect the health of your occupants or the number on your bill — with an untrained eye, you might be unaware of your building’s limitations and energy saving potentials. In that case, it is a good idea to schedule a building energy audit and systems assessment with a professional mechanical engineering firm.
Experts will help you determine where your energy is wasted and how to decrease the waste. A professional understanding of your energy expenses and mechanical design will help you invest in the right solutions, protecting your occupants and saving you money in the long run.