Your AC unit works to cool, circulate, and dehumidify indoor air. Efficiency through all of these processes is the key to great performance and lower energy costs.
How your central air conditioning system works.
- Indoor Unit: The purpose of an indoor unit is to remove moisture and warmth from the air, and includes: the filter—which catches dust and allergens, the air handler—which ventilates filtered air, and the evaporator coil—which is cooled by refrigerant. When air is blown over the evaporator coil, it is cooled and dehumidified. This cool, dry air is then distributed through the ventilation system, keeping your house comfortable during hot seasons.
- Condensing/Outdoor Unit: The outdoor unit is where excess heat is released. The refrigerant used in the evaporator coil absorbs heat from inside your home. This heat is then pressurized by a compressor and circulated through a condensing coil allowing it to be absorbed the air being blown out by the outdoor unit.
How does my furnace work?
During the cold seasons, your furnace acts as the core component that keeps your home warm. Just as with your A/C unit, you want to consider which type and model of heating system will be most effective for your home.
- Furnace: Central heating is a forced-air system that pushes warm air through your ventilation system to each room of a house. It is made up of a filter—which catches dust and allergens , and a blower unit which pushes filtered air through the furnace. Once the air particles are in the furnace they begin to absorb heat.
- Gas Heating: Gas furnaces create heat by burning natural fuel. A combination of fuel and air enters into the furnace burner, where a pilot light ignites the mixture. The heating process is referred to as combustion and causes warm air to rise and fill the heat exchanger. As the heat exchanger’s temperature increases, it heats the passing air. Warm air then gets distributed via your home’s ventilation system. A roof unit releases any byproducts from the heating process so they don’t enter your home.
- Electric Heating: Electric furnaces supply heat using an electric element. A current travels through the system’s resistor generating heat. This heat is spread and transferred through a “conduction-convection” process and then distributed to the rest of your home.
What role does my thermostat play in the heating & cooling process?
Your thermostat is the control center for the temperature of your home’s air. It detects if room temperature gets too cold or too warm and cues your HVAC system to come on or turn off. Your JH Martin team will recommend optimal placement for your thermostat so that it can accurately track and maintain your heating and cooling levels.
Ever consider a programmable thermostat? You can program different temperatures for bedtime, when you’re at work and on vacation. This will help you not waste energy running your system when you aren’t home and lead to a lower energy bill. JH Martin technicians can recommend an affordable, programmable thermostat that is user-friendly and suitable for your system.