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Air conditioning can account for more than half of your home’s electricity usage. When the equipment is incorrectly sized or installed, this percentage can be much higher. An improperly sized air conditioner will not only cost you more in electrical usage, it will also fail to properly cool your home and may need to be replaced sooner. 

Our air conditioning specialists are trained to make the proper tests snd measurements to ensure the system is sized and operating properly. We can also help you add the extra details, like zone control systems, programmable thermostats and annual maintenance that will allow you to get the most out of whatever air conditioning system we install for you.



Residential Cooling
Dirty condenser and evaporative coils have a negative impact on energy efficient HVAC operation. According to the US Department of Energy (DOE) “a dirty condenser coil can increase compressor energy consumption by 30%”. A dirty evaporator coil will decrease airflow which reduces heat transfer thereby degrading the dehumidification process. 1 

Although the drop in capacity is not as large with dirty condenser coils as it is with evaporator coils, the co-efficient of performance (COP) is severely aff¬ected. The compressor has to work longer and, therefore, the system will use more power.

A rise in condensing temperature from 35 to 40°C as a result of dirty coils can cut cooling capacity by 7% and increase power consumption by 10%, with a net compressor efficiency reduction of 16%. Such performance degradation in a 35kW unit operating for 2,000 hours in a year can increase operating costs by $250 per year. 2 

Poor heat exchange of coils reduces system performance meaning air conditioning is less able to cope with extreme ambient conditions. As an illustration of this, a study focusing on practical maintenance, shows that on a typical 10.5kW rooftop unit if evaporator airflow is restricted by 36%, the capacity is 19.4%. In effect this changes the 10.5kW unit to an 8.8kW unit. 3

Air conditioning can account for more than half of your home’s electricity usage. When the equipment is incorrectly sized or installed, this percentage can be much higher. An improperly sized air conditioner will not only cost you more in electrical usage, it will also fail to properly cool your home and may need to be replaced sooner. 

​1. Sheppard, Robert: “Clean HVAC System Coils Save Energy”  https://www.buildings.com/article-details/articleid/8282/title/clean-hvac-system-coils-save-energy

2. U.S Department of Energy, Federal Energy Management Program Factsheet www1.eere.energy.gov/femp/pdfs/om_cooling.pdf

3. Stefura, Mark. “The Importance of Clean Coils In Commercial Equipment” icemeister.net/Articles/FYI/Clean_Coils_Commercial.pdf
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