Similar to most sectors, the HVAC industry has technical terms. This jargon can be confusing, particularly when you speak with your technician about repairs or maintenance on your HVAC system. While you can always ask them for clarification, having a basic understanding of the terminology can help you feel more confident.
Let’s explore some fundamental terms that will help you grasp matters regarding your commercial heating and cooling service needs.
- Air Changes per Hour (ACH)
It pertains to the number of times the entire volume of air in a particular area of your property is circulated. This measurement is particularly crucial in various industrial environments.
- Annualized Fuel Utilization Efficiency (AFUE)
AFUE measures the efficiency of a heating appliance. A higher percentage indicates that the unit converts more of the fuel into usable energy. The minimum AFUE rating for a heating system is 78%, with some models achieving efficiencies in the 90s.
- British Thermal Unit (BTU)
BTU is a measurement that indicates the amount of heat produced by your furnace or other heating systems.
- Building Envelope
This term refers to the various elements that make up a building’s outer layer. It is crucial in maintaining a regulated indoor environment and contributing to effective climate control.
- Combined Annual Efficiency (CAE)
CAE is a comprehensive way to assess your facility’s heat output in relation to fuel consumption. It evaluates both water and space heating, making it crucial for large residential buildings, hospitality venues, and similar properties.
- Cycling
This is the process of an HVAC system alternating between turning on and off to keep the temperature at the desired level.
- Downflow
This method of air distribution directs air downward. Downflow is commonly employed in systems mounted on the floor.
- Dry Bulb Temperature
This measurement refers to the actual air temperature in your facility, estimated without considering humidity’s influence. Dry bulb temperature holds significance in specific commercial environments.
- Energy Star
It is a program by the EPA that certifies buildings and products, such as HVAC systems, based on their energy efficiency.
- Environmental Protection Agency (EPA)
This U.S. federal organization is tasked with safeguarding the environment and regulating HVAC refrigerants.
- Freon
It is a brand name for a category of refrigerants that include chlorofluorocarbons (CFCs) and hydrofluorocarbons (HFCs), which are often utilized in various cooling systems.
- Fresh Air Intake (FAI)
This opening allows outdoor air to enter the HVAC system, which is used for combustion or ventilation.
- Gauge Pressure
It is the pressure measured by a gauge that is calibrated to atmospheric pressure, enabling it to display negative values when the pressure falls below that level.
- Green Building
This structure is designed to reduce environmental impact, frequently featuring energy-efficient HVAC systems and using sustainable materials.
- Heating Seasonal Performance Factor (HSPF)
It is a metric that reflects the efficiency of a heat pump’s performance during a standard heating season. HSPF is determined by dividing the whole amount of heating needed (measured in BTUs) by the total electricity used (in watt-hours).
- High-Efficiency Particulate Air (HEPA)
This kind of filter is designed to capture a significant amount of tiny particles effectively.
- Minimum Efficiency Reporting Value (MERV) Rating
This standard assesses the effectiveness of air filters. Ones with higher MERV ratings provide better filtration, which means they allow fewer dust particles and other airborne contaminants to pass through.
- Minimum Outside Air
This term refers to the lowest quantity of outdoor air required to be brought into a building to maintain indoor air quality.
- Overcurrent
It pertains to a situation where the current in a circuit surpasses the equipment’s or conductor’s specified capacity. This condition often arises from short circuits or overloads.
- Oversizing
It is the installation of HVAC equipment that exceeds the necessary size or capacity for a given space. Oversizing can lead to increased energy expenses and inefficient performance.
- Plenum Space
This area specifies the section of a building designated for HVAC pathways and, in some cases, wiring. It’s usually found beneath a raised floor or above a drop ceiling.
- Purge Cycle
It is the process of eliminating contaminated refrigerant or air from a section of the HVAC system.
- Seasonal Energy Efficiency Ratio (SEER)
This metric evaluates the efficiency of an air conditioner or heat pump during a usual cooling season.
- System Balancing
This term refers to optimizing the HVAC system to ensure that each space receives the appropriate amount of airflow.
- Thermal Zone
It is a designated area within a building where the temperature is regulated separately from surrounding spaces.
- Tonnage
It describes the cooling capacity of an air conditioning system. Specifically, one ton is equivalent to the ability to cool 12,000 BTUs in one hour.
- Unconditioned Space
This is a section in a building that lacks heating or cooling, where the temperature is not deliberately regulated.
- Uninterruptible Power Supply (UPS)
This device supplies backup power when the primary energy source is interrupted, playing a vital role in ensuring the continuous operation of HVAC systems during power failures.
- Zero Energy Building (ZEB)
It is a structure that has a net energy consumption of zero throughout a typical year, meaning it yields as much power on-site as it consumes. This is usually achieved by integrating sustainable practices with renewable energy sources.
- Zoning System
This arrangement employs devices like dampers within the ductwork to manage and direct airflow to various building spaces, enabling tailored temperature zones.
Get Help From HVAC Professionals
Now that you’ve familiarized yourself with essential terminology, you’re better equipped to navigate the world of commercial HVAC. Understanding terms like BTUs and SEER ratings can help you make informed decisions about your system’s efficiency and performance.
If you still have questions or need assistance with your HVAC requirements, contact a trusted commercial heating and cooling service provider. They can thoroughly evaluate your current system, recommend upgrades or repairs, and help you implement a maintenance plan to ensure optimal performance. Taking these proactive steps will enhance comfort and prolong the life of your equipment.
