Variable Speed Heating and Cooling Pros Cons. Looking to purchase a new heating and cooling system and want to know more about variable speed HVAC systems pros and cons? Let’s go into some details you might want to consider when looking to purchase a variable speed system, Call D C’s heating & air conditioning at 949-770-9616 today.
Variable Speed Heating and Cooling Pros Cons
Lets go over the pro’s first about having a variable speed blower motor for your heating and cooling system. The answer may lie with a variable speed technology central heating and cooling system.
Unlike a base model or single speed HVAC system which cycles ON at 100% then OFF, equipment with variable speed technology may use less energy because it is designed to operate at multiple capacity levels.
An air handler is usually a furnace or a blower coil. Unlike conventional single-speed motors, a variable speed motor runs at a wide range of speeds to precisely control of heated and cooled air throughout the home. ECM are quieter motors and when noise is an issue they will cut the DB’s
The term “Variable Speed” actually refers to the blower motor inside the furnace or air handler. It’s an Electronically commutated motor, or (ECM). ECM’s are DC motors that function using a built-in inverter and a magnet rotor, and as a result are able to achieve greater efficiency than most AC motors.
Variable Speed Heating and Cooling Pros Cons
Now let’s go over the cons. Theses motors fail a lot and unlike the regular 2 and 3 speed fan motors they are expensive to diagnose and replace. When installing a variable speed furnace or air handler the contractor should test static pressures in supply and return to prevent premature motor failure. Always replace your air filter every 3 – 6 months if using 1 inch air filters. If you are using the 4 – 5-inch filters once a year,
Most variable speed motors use different transformers and more control boards to make the motor work. I have replaced many defective variable speed motors this year and expect a lot more.
These new variable speed motors are interesting and might be an energy saving way for the future but at this point as a mechanic I am seeing failure and issues with the motors and the electrical PC boards to run it.
If you do not replace or clean your air filter regularly you will burn this motor up. Most failures are caused from neglect.
Variable Speed: Variable speed compressor technology allows the unit to run at the speed that best meets your comfort needs coupled with energy-efficient operation. Down fall is expensive repairs.
Are variable speed air conditioners worth it?
Right now my opinion on variable speed air conditioning is not worth the energy savings and we are seeing motors and the electronic boards failing. These motors and boards are expensive to repair or replace. Sure, the noise level and electrical saving is a plus. Read my 5-star air conditioning reviews for Orange County, California CA.
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