Is your HVAC equipment the right size for your home? Right sizing impacts a lot of things, including efficiency, noise reduction, greater heating and cooling comfort, and saves money on your utility bills each month.

Install a system that is too large, and it will increase installation costs, waste energy, and cost more in overall operating costs than a system that is the right size. Yet oversizing is a common occurrence in both residential and commercial applications because contractors often use rule-of-thumb sizing which calculates load based on square footage.How To Assure Your HVAC Equipment Is The Right Size

Most HVAC systems are sized to meet heating and cooling load requirements as little as 1 to 3 percent of the time. An efficient system works effectively for the conditions as they occur up to 99 percent of the time. With an oversized system, that means reduced cooling capacity. Compressors short cycle, which in turn affects the system’s ability to dehumidify and control the temperature and the environment throughout the building effectively.

Instead, the right way to size looks at the whole building design concept and takes into account how the system impacts the building, rather than one component at a time. It should look at current requirements rather than future needs, possibly with options for modification and expansion later on if the need is there.

Calculate HVAC system design loads in accordance with accepted engineering standards. Handbooks are available to assist in finding load standards, including handbooks such as the ASHRAE Handbook. This provides the right tools to calculate an accurate load estimate.

Keep in mind that maximums are rarely met. On the hottest or the coldest days of the year, it’s unlikely a building will reach maximum occupancy, and every light and every piece of equipment will be operating at the same time.

Focus in on selecting equipment meeting or exceeding the SEER or EER for the capacity requirement. Technicians often use computer analysis tools to simulate how a building will operate and how loads are affected at different points. This can show where changes can be made that will have real impact over time.

Is your HVAC equipment as efficient as possible?