If your heat pump is nearing its average life expectancy of 10 to 15 years, it may be time to replace it with a newer model. When it comes to energy efficiency, it’s important to consider the SEER (seasonal energy efficiency ratio). The higher the ratio, the more efficient the unit is; the more efficient it is, the greater comfort it delivers. So what’s the difference between the 14-SEER and 18-SEER heat pumps we carry at Martin Enterprises? HVAC technology.


Heat pumps with a higher rating take advantage of innovative HVAC technology such as variable-capacity controls. An 18-SEER heat pump has several features not found in a 14-SEER unit:

  • Two-speed compressors. Two-speed compressors enable a heat pump to supply the exact amount of cooling you need at any given time. Unlike a single-speed compressor that always runs at maximum capacity, a two-speed compressor operates on two levels: low on temperate days and high on hot, humid days.
  • Variable-speed motors. A variable-speed motor on a blower or fan moves at different speeds to control the amount of cooled air distributed throughout your home. Controlled airflow means more consistent comfort for your family.

SEER Determines Energy Efficiency

The two-speed compressors and variable-speed motors found in 18-SEER units work together to eliminate uneven temperatures and provide greater humidity control. These features let your heat pump operate at lower, more efficient speeds up to 80 percent of the time. That translates into a savings of 22 percent a year in electricity costs compared to a 14-SEER heat pump.

Noise Reduction

A variable-speed motor means reduced noise because the blower is not always operating at full speed. An 18-SEER heat pump has a sound level of 55 decibels compared to 65 decibels on a 14-SEER unit.

To learn more about the benefits of the HVAC technology found in a heat pump rated 18 SEER, check out Martin Enterprises’ line of Carrier heat pumps or call (847) 719-8442.

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