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HVAC stands for heating, ventilation, and air conditioning. If your home has a furnace and an air conditioner, you have an HVAC system. The following outlines the basics of your home’s HVAC system.


A furnace or other heating system is usually located in the garage or basement. It uses electricity, propane, or natural gas to generate heat. Heated air is blown throughout your home. Air returns through ducts back into the furnace, so air constantly cycles through your home when the furnace is operating.

Air Conditioner

Your air conditioning system has two main parts. There’s an outdoor unit called the condensing unit and equipment near your furnace called the evaporator unit. The air conditioning system removes heat from the air and blows cool air through your home’s ductwork. Air conditioning systems run on electricity.


Your home can have natural ventilation and mechanical ventilation. You can open windows and doors to naturally ventilate your home. If your home has mechanical ventilation, a fan forces outdoor air throughout your home so fresh air is brought in and stale air is forced out.

Ductwork and Vents

If your home has ductwork, it will be either in the crawlspace, basement, or attic. The ductwork is connected to vents in each room, so conditioned air can be blown throughout your home.


Your home’s thermostat controls the furnace and air conditioner. It’s located on the main floor of your home. There are non-programmable, programmable, and smart thermostats. Non-programmable thermostats are the oldest type. With programmable thermostats, you can set a schedule for the times you prefer to heat and to cool your home. A smart thermostat uses artificial intelligence to decide when to heat and when to cool your home and allows you to change settings via your smartphone.

Mighty Ducts Heating and Cooling LLC of Lebanon, NJ, is an HVAC company. We install, tune-up, and repair furnaces and air conditioners. We can also improve your home’s indoor air quality by installing equipment like an air purifier, a humidifier, or a dehumidifier. We can also offer you indoor air quality assessments and proven solutions. Please call our office today to find out more and to set an appointment. We would love to tell you how we can help with all of your indoor climate comfort needs.