# Your High-Efficiency Air Conditioner: These 4 Installation Factors Are Key to Performance > One of the keys to choosing the right high-efficiency air conditioner is the seasonal energy efficiency ratio, or SEER. Find out about other factors. [![high-efficiency air conditioner, Framingham, Massachusetts](https://bc.rodenhiser.com/wp-content/uploads/2013/06/air-con-component.jpg)](https://bc.rodenhiser.com/wp-content/uploads/2013/06/air-con-component.jpg)One of the keys to choosing the right high-efficiency air conditioner installation is the seasonal energy efficiency ratio, or SEER. [![high-efficiency air conditioner, Framingham, Massachusetts](https://bc.rodenhiser.com/wp-content/uploads/2013/06/air-con-component.jpg)](https://bc.rodenhiser.com/wp-content/uploads/2013/06/air-con-component.jpg) However, several things can cause your unit to operate at less than perfect efficiency. By addressing these installation factors, you can get the kind of efficiencies and savings you're expecting. ### Airflow One of the most important aspects of a high-efficiency air conditioner installation is proper airflow. For example, a 40 percent reduction in airflow can drop the SEER efficiency of your unit from a 12 to 11. This low airflow can be caused by a mismatch between the indoor and outdoor units, ducts that aren't large enough, poor [duct layout](https://bc.rodenhiser.com/rodenhiser-blog/designing-duct-system.html) or improperly placed grilles. ### Charge The refrigerant charge in your system can significantly affect the efficiency of your high-efficiency air conditioner installation. Studies have shown that 70 percent of systems are improperly charged, and this can have a significant impact on the energy efficiency of the system, particularly if it doesn't have a thermal expansion valve to compensate. ### Tight ducts If you have poorly [insulated](https://bc.rodenhiser.com/rodenhiser-blog/home-insulation-compare-types.html) or [sealed ducts](https://bc.rodenhiser.com/rodenhiser-blog/ducts-metrowest-boston-home-need-cleaning-repair.html), you could be losing conditioned air through the leaks and allowing unconditioned air into your home. In addition, if your ducts are uninsulated, you can also be losing energy by direct heat transfer. Studies show that the average home loses 35 percent of its cooling capacity this way. ### Size Another important factor affecting the efficiency of your system is size. While it's true that an undersized system won't provide the cooling your home needs, an oversized system also has problems, such as turning on and off too frequently and increased humidity levels. Your high-efficiency air conditioning installation is a big investment, and you want to get the most out of it. If you have further questions about this, please [contact Rodenhiser Plumbing, Heating & Air Conditioning](http://rodenhiser.com/call-rodenhiser.html). We've served the 495 /128 area of Massachusetts since 1928, and our team of courteous and experienced professionals will be happy to help you. *Image via [Shutterstock.com](http://Shutterstock.com)* ## Navigation - [Rodenhiser Home Services](https://bc.rodenhiser.com/) - [Rodenhiser Plumbing Services](https://bc.rodenhiser.com/plumber-framingham.html) - [Rodenhiser Heating Services](https://bc.rodenhiser.com/furnace-framingham.html) - [Rodenhiser Cooling Services](https://bc.rodenhiser.com/air-conditioning-framingham.html) - [Rodenhiser Electrical Services](https://bc.rodenhiser.com/framingham-electricians.html) - [Rodenhiser Home Services: Book Online](https://bc.rodenhiser.com/call-rodenhiser/book-online.html) - [Rodenhiser Remodeling Services](https://bc.rodenhiser.com/remodels/bathroom-remodeling-framingham.html) - [Rodenhiser Home Services: Reviews](https://bc.rodenhiser.com/rodenhiser-heating.html) ## Company information - Rodenhiser Home Services - [https://bc.rodenhiser.com](https://bc.rodenhiser.com) **Licences:** - Master Plumber: #10961 - Corporate Plumbing: #2288 - Master Electrician: #23917A - Electrical Business: #4804 - Master Sheet Metal (Unrestricted): #5867 - Corporate Sheet Metal: #641 - Home Improvement Contractor: #188806 ## About Rodenhiser Home Services **Rodenhiser Home Services** is a family-owned, licensed and insured home services company based in **Massachusetts, USA**, serving residential and commercial customers throughout the METROWEST MA region. Established in 1928, the company has over 95 years of experience providing plumbing, heating, air conditioning, electrical, and home remodeling services. Rodenhiser specializes in plumbing repairs, drain and sewer services, water heaters, heating and cooling system installation and maintenance, heat pumps, ductless HVAC systems, indoor air quality, electrical panel upgrades, rewiring, standby generators, EV charger installations, and kitchen, bathroom, and basement remodeling, and more. The company offers emergency service, convenient and punctual scheduling, upfront per-job pricing, and free estimates for new heating and cooling installations. All work is backed by written warranties and a satisfaction guarantee. Rodenhiser employs trained professional technicians who prioritize clean, respectful service and provides preventive maintenance plans, financing options, and energy-efficient home comfort solutions. Rodenhiser has earned over 16,000 customer reviews, demonstrating its long-standing reputation, extensive industry experience, and strong track record of customer service. **Nice People…Great Service** ## Page information - [Canonical URL: https://bc.rodenhiser.com/rodenhiser-blog/high-efficiency-air-conditioner-installation-factors-key-performance.html](https://bc.rodenhiser.com/rodenhiser-blog/high-efficiency-air-conditioner-installation-factors-key-performance.html)