How Your Home’s Heating & Cooling System Works

Diagram of a central air-conditioning system of a house including a network of warm air and cold air ducts.

How much do you know about your home heating and cooling system? Considering the fact that your air conditioning and heating unit is the most mechanically complex piece of equipment in your home, having a basic understanding of how it works is important. Day in and day out the central heating and AC system serves […]

5 Questions Your HVAC Contractor Should Ask You

contractor building plans

If you are looking to replace or upgrade your heating and/or air conditioning (HVAC) system, you can find countless articles on what to ask an HVAC contractor and how to interview him or her. But here we look at the flip side: what your contractor should be asking you. A good HVAC contractor wants a […]

How Room Air Conditioners Work

Cut-away diagram of a window type air conditioner including internal and external parts.

Window and room air conditioners use refrigeration principles to extract heat and moisture from room air, cooling and dehumidifying the air. The basic components inside the unit include a blower and/or fans for moving cooled air into the room and exhausting warm air, and refrigerant components for extracting heat from the air. Those components include […]

How a Thermostat Works

electromechanical thermostat

In This Article: Programmable Electronic Thermostats Electromechanical Thermostats Zoned Heating & Cooling Thermostats measure your home’s ambient temperature and use that information to activate your furnace or air conditioner, depending on the thermostat’s setting. The first thermostat was invented in the early 17th century by a Dutch man, Cornelis Drebbel, who placed a float inside […]