Understanding Common Terms in Heating and Cooling

Use These Phrases and Impress Others

The complicated world of heating, ventilation, and air conditioning can sometimes leave homeowners feeling out of the loop on knowing the key phrases necessary for maintaining consistent indoor temperatures. Whether you’re at a party or scheduling HVAC maintenance, understanding these terms can help you communicate effectively with qualified technicians. Dropping a few key acronyms around town will also communicate to others your casual expertise when it comes to indoor comfort!

BTU (British Thermal Unit): BTU is a measure of heat output. It represents the amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit. In HVAC, BTU is used to describe the heating or cooling capacity of a system.

SEER (Seasonal Energy Efficiency Ratio): SEER is a rating that measures the efficiency of air conditioning systems. It represents the cooling output of the unit divided by the energy it consumes over a typical cooling season. Higher SEER ratings indicate greater energy efficiency.

AFUE (Annual Fuel Utilization Efficiency): AFUE is a measure of the efficiency of gas furnaces and boilers. It represents the percentage of fuel that is converted into usable heat over the course of a year. Higher AFUE ratings indicate greater efficiency.

MERV (Minimum Efficiency Reporting Value): MERV is a rating that indicates the effectiveness of air filters in removing airborne particles from the air. Filters with higher MERV ratings can capture smaller particles but may also restrict airflow more than lower-rated filters.

Load Calculation: A load calculation is an assessment of the heating or cooling requirements needed to maintain a comfortable indoor environment in a specific space. Factors such as square footage, insulation, windows, and occupancy are taken into account to determine the appropriate size and capacity of HVAC equipment.

Building Automation System (BAS): A BAS is a centralized control system used in commercial buildings to monitor and manage HVAC, lighting, security, and other building systems. It allows for automated scheduling, remote monitoring, and energy optimization.

Demand Controlled Ventilation (DCV): DCV is a ventilation strategy that adjusts the amount of outside air supplied to a building based on occupancy levels or indoor air quality measurements. It helps optimize energy usage while maintaining adequate indoor air quality.

Desiccant Wheel: A desiccant wheel is a component of some commercial HVAC systems used for dehumidification. It consists of a rotating wheel coated with a desiccant material that absorbs moisture from the air passing through it.

Air Handler: An air handler is a unit that circulates air within an HVAC system. It typically contains a blower, filter, and coil and is responsible for distributing conditioned air throughout a building.

Load Shedding: Load shedding refers to the practice of temporarily reducing the energy consumption of an HVAC system during peak demand periods. This can be achieved by adjusting thermostat settings or cycling equipment to conserve energy and prevent strain on the electrical grid.

Knowing these terms will make discussions with HVAC professionals a snap.  If you ever encounter a term you’re unsure about, don’t hesitate to ask your technician for clarification. And coupled with a drink with a parasol  and a smile, dropping the phrase “load shedding” at your next party will make you a star! Okay, well, maybe…

Air-Tro has been keeping Southern California comfortable since 1969. Call us for all your HVAC needs. (626)357-3535.