Skip to content

Glossary

AFUE– Annual Fuel Utilization Efficiency. A measure of a gas furnace’s efficiency in converting fuel to energy the higher the rating, the more efficient the unit. For example: A rating of 90 means that approximately 90 percent of the fuel is used to provide warmth to your home, while the remaining 10 percent escapes as exhaust.

BTU– British Thermal Unit. This is the amount of heat it takes to raise one pound of water one degree Fahrenheit. For your home, it represents the measure of heat given off when fuel is burned for heating or the measure of heat extracted from your home for cooling.

CFM– Cubic Feet Per Minute. A standard measurement of airflow. A typical system requires 400 CFM per ton of air conditioning.

Capacity– The output or producing ability of a piece of cooling or heating equipment. Cooling and heating capacities are referred to on BTUs.

Comfort-R™ Airflow System– An exclusive feature of a high efficiency home comfort system from Trane. This method of ramping airflow gives you greater humidity control in cooling and provides warmer air during heating start up.

Compressor– The heart of an air conditioning or heat pump system. It is part of the outdoor unit and pumps refrigerant in order to meet the cooling requirements of the system.

Condenser Coil or Outdoor Coil– In an air conditioner, the coil dissipates heat from the refrigerant, changing the refrigerant from vapor to liquid. In a heat pump system, it absorbs heat from the outdoors.

Damper– Found in ductwork, this movable plate opens and closes to control airflow. Dampers can be used to balance airflow in a duct system. They are also used in zoning to regulate airflow to certain rooms.

Ductwork– Pipes or channels that carry air throughout your home. In a home comfort system, ductwork is critical to performance in fact, it’s as critical as the equipment.

Evaporator Coil or Indoor Coil– The other half of your air conditioning system located inside your home in the indoor unit. This is where the refrigerant evaporates as it absorbs heat from the air that passes over the coil.

Gas Furnace Heat Exchanger– Located in the furnace, the heat exchanger transfers heat to the surrounding air, which is then pumped throughout your home.

HSPF– Heating Seasonal Performance Factor. This rating is used in measuring the heating efficiency of a heat pump. The higher the number, the more efficient the unit.

Package Unit– A heating and cooling system contained in one outdoor unit. A package unit is typically installed either beside, on top of the home, or sometimes in the attic.

Refrigerant– A chemical that produces a refrigerating effect while expanding and vaporizing. Most residential air conditioning systems contain R-22 refrigerant. R-22 is regulated by international controls under the Montreal Protocol and in the United States by the Environmental Protection Agency. It is scheduled to be in production until the year 2020. It’s used in approximately 95 percent of air conditioning equipment manufactured in the U.S. today.

SEER– Seasonal Energy Efficiency Ratio. A measure of cooling efficiency for air conditioners and heat pumps. The higher the seer, the more energy efficient the unit. The government’s minimum SEER rating is 10. (It’s similar to comparing miles per gallon in automobiles.)

SEET– Seasonal Extreme Environmental Test Lab. This is Trane’s torture chamber for heating and air conditioning systems, where five years of service are condensed into 16 torturous weeks. If a product doesn’t make it through our SEET lab, it’s not manufactured. We push our equipment to extremes because we’d rather test them in our lab than in your home.

Split System– The combination of an outdoor unit (air conditioner or heat pump) with an indoor unit (furnace or air handler). Split systems must be matched for optimum efficiency.

Thermostat– A thermostat consists of a series of sensors and relays that monitor and control the functions of a heating and cooling system.

Ton– A unit of measurement used for determining cooling capacity. One ton is the equivalent of 12,000 BTUs per hour.

Zoning– A method of dividing a home into different comfort zones so each zone can be independently controlled depending on use and need.

Should You Choose Oil or Gas Heat for Your Home?
Should You Choose Oil or Gas Heat for Your Home?

Whether you’re building a new home or are just looking to make a change, you have to consider the pros and cons of oil or gas heat. More people have gas heat. While it’s a bit more expensive to install a gas heating system, it will save you money over the long run. It’s also…

Fireplace Maintenance - How to Prepare Your Fireplace for Winter
How to Prepare Your Fireplace for Winter

Some people love to sit by the fireplace in the winter. When it’s chilly outside, you can sit around the fire reading or watching a movie. It can make your home feel rustic and homey. But a fireplace can also be dangerous. If you don’t make sure your fireplace maintenance is up to date, it…

What Are the Biggest HVAC Challenges for the Fall? | HVAC Repairman
What Are Some of the Biggest HVAC Challenges for the Fall?

One of the reasons you should always know how to reach an experienced HVAC repairman is because weather is unpredictable. You never know when your heating or cooling system will take a hit. When this happens, no matter what time of year it is, you’re going to need help. One way to prevent a lot…

Which is Better for Your Home – Gas or Electric Furnace?
Which is Better for Your Home – Gas or Electric Furnace?

One of the most debated decisions when it comes to your home’s heating system is – gas vs electric furnace. Thankfully, this isn’t a decision you have to make every year. If you’re lucky, you’ll only have to replace or convert your heating system a few times in your lifetime. Some people simply have their…

Should You Wait Until Next Spring to Replace Your Air Conditioner?
Should You Wait Until Next Spring to Replace Your Air Conditioner?

Now that the summer is over and cooler weather is coming, a lot of people aren’t thinking about their air conditioner. Even if it gave you trouble all summer long, you wouldn’t think to replace your air conditioner in the cooler months. No matter what kind of issues you had with your air conditioning system…

Is It a Good Idea to Install a Tankless Water Heater?
Is It a Good Idea to Install a Tankless Water Heater?

If it’s time for you to install a new water heater, you have to decide between a conventional water heater and a tankless water heater. These are newer technologies available that are perfect for your home. They can improve your hot water experience. They can also save you a lot of money. One of the…

Near Record Breaking Heat Smothers The Southeast
Near Record Breaking Heat Smothers The Southeast

Near record breaking temperatures continue to hover over the majority of the southeastern region of the United States. In a few cases, such as in Atlanta, the high for the day was just one degree short of a record set in 1925. This weather is rather unusual in the area, which would typically expect highs…

How to Regulate the Temperature Variations Throughout Your House
How to Regulate the Temperature Variations Throughout Your House

Nothing is worse than being hot in your bedroom and freezing in your bathroom. These temperature variations can be very frustrating. Whether it’s winter or summer, it seems impossible to keep your home comfortable. No matter what you do, you can’t find a happy medium. You’re not alone. The good news, however, is that C&L…

Pros and Cons of Ductless Heating and Cooling | C&L Services
Pros and Cons of Ductless AC and Heat

Over the last few years, a lot of homeowners have moved away from duct heating and cooling. It simply isn’t energy efficient. Over the course of five or ten years, you can spend thousands of extra dollars cooling and heating your home with traditional HVAC units. While ductless heating and cooling systems have a lot…

Helpful Tips to Lower Humidity in Your Home | C&L Services
Helpful Tips to Lower Humidity in Your Home

This time of year, your home can become uncomfortable no matter how high you blast the A/C. Temperatures are high and so is humidity. And, even though fall is just around the corner, that doesn’t mean you’re out of the woods just yet. If you live in South Carolina, you know that the spring and…