» AC & Heating Energy Efficiency
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AC & Heating Energy Efficiency

We Put All Our Energy into Efficiency


If you’re like most people, energy efficiency and cost savings are at the top of your wish list when considering which home heating and cooling system to choose.

Like mythical genies, our engineers are in the wish-fulfillment business, dreaming up a wide variety of sophisticated options to grant virtually any need—including some of the world’s most efficient cooling and heating solutions.

As you research all your options, you’ll no doubt come across your share of industry-standard efficiency rating systems. They may look intimidating, but in a nutshell, all you need to know is the higher number, the higher the efficiency, and the lower your long-term energy costs will be.

Questions? We are your local Carrier® expert can also help you choose the heating and cooling products that are right for you.


The Seasonal Energy Efficiency Ratio (SEER) is the measure of efficiency by which the cooling process of air conditioner and heat pump systems is rated. The higher the SEER number, the greater the efficiency, and therefore the greater the energy savings. Today, U.S. regulatory agencies require all new products to have a 13.0 SEER rating or better. We offer air conditioner and heat pump systems that can achieve SEER ratings over 20.


If you’re in the market for a gas- or oil-fired furnace, the Annual Fuel Utilization Efficiency (AFUE) rating is a helpful stat to know.

Displayed in percentages, the AFUE rating tells you how much of the fuel consumed by your furnace is used to heat your home and how much is wasted. The higher the AFUE rating, the greater the efficiency. For example, a 90% furnace creates heat, 90% of which is used directly by the home with 10% lost, generally as a result of venting. We offer a full line of furnaces, some with AFUE ratings that exceed 98%. We also boast the most efficient gas furnace on the market.*

If you have an older furnace (with an AFUE of approximately 64%), you could save a staggering 34% on your heating bills simply by replacing it with a new high-efficiency furnace—and make up the cost of replacing your old, inefficient furnace pretty quickly.

If your furnace is more than 15 years old and you’re not sure of its AFUE rating, you can contact the manufacturer about it. When you call, you’ll need to have the furnace’s serial number handy. Chances are you’ll find it on a small metal plate attached to the unit.

*The 59MN7A60V21-20 model gas furnace with Greenspeed intelligence is the most efficient furnace you can buy at 98.5% AFUE.


Heating Seasonal Performance Factor (HSPF) measures the efficiency of the heating mode of heat pumps. The higher the number, the greater the efficiency and cost-savings. Today’s models are required to have a minimum of 7.7 HSPF. Not that we’re bragging (even though we kind of are), but we offer a heat pump with an HSPF rating of 13 that leaves other heat pumps out in the cold*.

*In the commonly sold 3-ton size, consumers will enjoy a heating efficiency rating 29 to 69 percent higher than other air source heat pumps on.


The Coefficient Of Performance (COP) is used to measure certain heat pumps’ efficiencies while in heating mode. You’ll commonly see this measure applied to geothermal products. Unless you’re looking for painful reminders of high school math classes or are a budding engineer, this one is pretty tough to calculate. In a nutshell it’s the energy produced by the heat pump (in watts) divided by the energy consumed by the heat pump (in watts) – easy. Like other efficiency ratings, higher is better.


If you have geothermal system, air conditioner or air source heat pump, you may be interested in your system’s Energy Efficiency Rating (EER). It measures cooling efficiency and is calculated by dividing a product’s BTU output by the watts of power it uses. Rule of thumb – higher is better.

Cost Savings


All your life, you’ve heard that you get what you pay for, and energy efficiency is no exception. The higher the efficiency of a heat pump, air conditioner or furnace, the more sophisticated the unit, and therefore, the more it tends to cost.

But despite the higher price tag, energy-efficient units invariably come with lower utility bills. Significantly lower, in many cases. As a result, you could see your additional investment paid back in only a few short years. And long after you’ve broken even with savings, you’ll continue to save on your energy bills. Plus you get to enjoy the added comfort benefits that usually come with the model’s increased functionality.

How long would it take for one of our fuel-efficient systems to pay off for you? We would be happy to break down all the numbers for you.

Matching Your System for Optimum Efficiency


Additional factors that affect the efficiency of your air conditioner or heat pump system are your indoor coil and blower motor. If your indoor coil isn’t properly sized to match your outdoor condensing unit, the system may not give you the stated SEER and/or HSPF ratings and could even develop performance problems. Not having a variable-speed blower motor means the system will tend to consume more electricity. That’s because the fan will frequently be operating at higher speeds than necessary to move the conditioned air in the house.

When you replace an existing outdoor unit, make sure you talk to us about the potential effects of the indoor system on efficiency. It may be wise to replace both units in order to assure longer system life and gain peak performance, efficiency and comfort.

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