What is a modulating A/C unit?

Over the last 30-40 years air conditioners have not changed that much when it comes to indoor comfort. They were designed to cool the house and dehumidification was an added bonus in the process. Unfortunately, too many systems are oversized which results in a cold, clammy house. To minimize this problem the industry designed a 2-stage compressor in the early 80’s. This solved some issues but the added cost prevented most people from purchasing them.

The Introduction of the Modulating Compressor

With the evolution of variable speed blowers and modulating gas valves on furnaces, the compressor manufacturers had to get up to speed quickly. The big breakthrough was the introduction of the variable speed compressor. The benefits of this design revolutionized indoor comfort. You now have a system that has five stages of cooling. So if you have a 3 ton system, it has the ability to cool from 12,000 BTU to 36,000 BTU. The net result is that your indoor comfort has improved exponentially.

The crown jewel of cooling is the modulating compressor. This unit has 60 possible ranges of cooling which results in the most comfortable home possible.

The main benefits of this technology are:

  • You can raise the indoor temperature and have greater comfort because there is less humidity.
  • Less operating cost because most of the time it runs on a lower capacity which reduces the amp draw
  • Even temperature throughout the home, no more cold, clammy rooms
  • Longer lifespan because of fewer start/stop cycling

If you have any HVAC questions, call (800) 350-HVAC or email adam@officialhvac.com

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