The Variables That Impact Commercial HVAC Sizing

HVAC systems need to be sized relative to the space it’s supposed to heat and cool. It sounds simple enough, but it gets more complicated with larger spaces like commercial buildings. In today’s post, local HVAC and refrigeration equipment services contractor Cafco Services takes a look at the variables that impact commercial HVAC sizing.

Why Is HVAC Sizing Important?

Most people tend to go for higher-spec options with just about anything from cars to electronics, and for the most part, bigger is indeed better. However, the case is not the same with HVAC systems. It needs to be sized just right for the room because going over or undersized causes problems. You don’t want to get an undersized HVAC system because it would be running at full capacity at all times, which can result in early failure. An oversized HVAC system, on the other hand, would be overly-efficient, in that it will start and stop too frequently, which will increase the strain on the system and contribute to an early failure.

Variables That Contribute to Commercial HVAC Sizing

When it comes to sizing requirements, there is no one-size-fits-all HVAC solution for commercial properties. HVAC companies take the following variables when designing a commercial HVAC system:

• Building Size and Volume. The commercial space’s square footage serves as the primary factor in determining the HVAC size. We’re not going into details with the math, but typically a room that’s 130 square feet or less will need an HVAC with 1 horsepower (HP).

• Building Insulation. A well-insulated building has a lower thermal transfer rate. That is, it stays cool longer during the cooling season and stays warm longer during the heating season, which means it requires a less powerful HVAC system. Buildings with insulated windows can also be a factor, as not all commercial properties have this due to size considerations.

• Occupancy and Building Type. The building’s purpose will also affect its heating, cooling, and ventilation requirements. A restaurant, for example, will have an entirely different set of requirements compared to a retail storefront, even if they have the exact same square footage. A hospital will have more stringent air quality requirements, while a server room will need more aggressive cooling to keep their equipment running. Businesses that keep office hours can also be a consideration if heating and cooling are not needed during off-hours.

Whether designing and installing a new HVAC system for your business or if you need HVAC filter products for your existing one, our team at Cafco Services can help. Give us a call at (513) 242-3400, or fill out our contact form to schedule an appointment.