A: HVAC stands for Heating, Ventilation, and Air Conditioning. It's a broad term that refers to the systems and technologies used to control the indoor environment of buildings, including temperature, humidity, and air quality.

A: At its core, an HVAC system works by moving heat.

Heating: A furnace or heat pump generates heat, which is then distributed throughout your home via a duct system and vents.

Cooling: An air conditioner or heat pump absorbs heat from inside your home and expels it outdoors, often using a refrigerant.

Ventilation: This involves exchanging stale indoor air with fresh outdoor air, either naturally (through windows) or mechanically (using fans and ducts).

Air Circulation: A blower fan in the air handler pushes conditioned air through the ductwork, distributing it evenly.

A: Indoor Air Quality (IAQ) refers to the quality of the air within and around buildings and structures, especially as it relates to the health and comfort of building occupants. It's important because poor IAQ can lead to various health problems, including respiratory issues, allergies, headaches, and fatigue. Good IAQ contributes to a healthier and more comfortable living or working environment.

A: Common types of HVAC systems include:

Split Systems: The most common, with an indoor unit (furnace/air handler) and an outdoor unit (AC or heat pump condenser).

Heat Pumps: Can provide both heating and cooling by moving heat in either direction.

Ductless Mini-Splits: Ideal for zoning or additions, they don't require ductwork and consist of an outdoor unit and one or more indoor units.

Packaged Units: All components (heating and cooling) are contained in a single outdoor unit, often found on rooftops of commercial buildings or on slabs next to residential homes.

Geothermal Systems: Utilize the stable underground temperature to efficiently heat and cool a home.

A: The average lifespan of an HVAC system typically ranges from 10 to 20 years, though this can vary significantly. Factors influencing lifespan include:

• The type of system (furnaces often last longer than AC units).
• Frequency and quality of maintenance.
• Climate conditions.
• Initial installation quality.
• How often the system is used.

A: Choosing the right-sized HVAC system is crucial for efficiency and comfort. An oversized system will cycle on and off too frequently (short-cycling), leading to uneven temperatures, increased wear and tear, and poor dehumidification. An undersized system will struggle to maintain comfortable temperatures, especially during extreme weather, and run constantly, leading to higher energy bills.

The best way to determine the correct size is to have a professional HVAC technician perform a load calculation (often called a Manual J calculation). This involves assessing your home's square footage, insulation levels, window types, local climate, and other factors.

A: It is generally recommended to have your HVAC system serviced at least once a year. For optimal performance and longevity, many professionals recommend twice a year: once in the spring for your air conditioning unit and once in the fall for your heating system. This ensures the system is ready for peak usage in each season.