Whether you are just starting to learn about HVAC systems or have been delving into the details for years, it’s easy to get tripped up by industry acronyms. Like many specialized fields, HVAC professionals use acronyms to streamline communication, but this can be frustrating if you’re not familiar with the lingo. Understanding these terms is key to making informed decisions about your home’s heating, cooling, and ventilation needs. That’s why we’ve put together this reference guide—to help you quickly decode any unfamiliar terms, so you can confidently navigate HVAC discussions, whether you’re reading about products, chatting with technicians, or watching instructional videos.
AC: Air Conditioning
Air conditioning systems cool and dehumidify indoor air. They can function as standalone units or as part of a more comprehensive HVAC system, like a heat pump.
AFUE: Annual Fuel Utilization Efficiency
AFUE measures the efficiency of gas furnaces, expressed as a percentage. A higher AFUE indicates better fuel efficiency, which can translate to significant savings on energy bills.
AHU: Air Handling Unit
An AHU is part of an HVAC system that circulates air. It typically contains heating and/or cooling elements, a blower, filter(s), and valves. However, some systems have thermostats built into the air handling unit.
BTU: British Thermal Unit
A BTU measures energy and is commonly used in HVAC to quantify the cooling power of an air conditioning unit. The higher the BTU rating, the more powerful the system.
CFM: Cubic Feet per Minute
CFM measures the volume of air a system circulates in one minute. Properly matching a system’s CFM to your space is crucial for efficiency and performance.
COP: Coefficient of Performance
COP measures the efficiency of a heat pump by comparing heat output to electrical energy input. A higher COP means greater efficiency.
DCV: Demand-Controlled Ventilation
DCV systems adjust ventilation levels based on occupancy and indoor air quality, helping to balance energy efficiency with optimal air conditions.
DPT: Dew Point Temperature
DPT is the temperature at which air becomes saturated with moisture, leading to condensation. Monitoring DPT is key to managing indoor humidity levels.
ECM: Electronically Commutated Motor
Unlike traditional motors, ECMs can adjust their speed based on system needs, enhancing efficiency by responding to real-time conditions like thermostat settings and building occupancy.
EER: Energy Efficiency Ratio
EER measures the efficiency of cooling systems at a specific temperature. Other measurements, such as SEER, are necessary for a more comprehensive understanding of a system’s efficiency; however, EER is an excellent starting point for evaluating a system’s performance.
ERV: Energy Recovery Ventilator
ERV systems enhance indoor air quality by transferring heat and moisture between incoming fresh air and outgoing stale air, improving efficiency and comfort.
EVAP: Evaporator Coil
The evaporator coil is a key component where refrigerant absorbs heat, playing a central role in the cooling process.
HSPF: Heating Seasonal Performance Factor
HSPF measures the efficiency of heat pumps during the heating season. A higher HSPF rating means better energy efficiency.
HVAC: Heating, Ventilation, and Air Conditioning
HVAC is the umbrella term for systems that control indoor climate, including heating, cooling, and air quality. Beyond the basics, HVAC services can also include duct cleaning, thermostat upgrades, and air quality testing.
IAQ: Indoor Air Quality
IAQ refers to the condition of the air inside a building in relation to occupants’ health and comfort. Maintaining good IAQ involves regular filter changes, adequate ventilation, and consistent system maintenance.
MERV: Minimum Efficiency Reporting Value
MERV ratings measure an air filter’s effectiveness. Higher MERV ratings offer better filtration but may impact airflow. The highest ratings are typically used in settings that require near-perfect filtration, such as hospitals. Balancing filtration needs with system performance is key.
SEER: Seasonal Energy Efficiency Ratio
SEER ratings measure the efficiency of air conditioning units over an entire cooling season. The higher the SEER rating, the more energy-efficient the unit.
SMART Thermostat
Self-Monitoring, Analysis, and Reporting Technology Thermostat, provides remote control over your home’s heating and cooling via smartphone, tablet, or computer. These devices can learn your preferences, offer programmable schedules, and integrate with other smart home systems, optimizing comfort and energy efficiency.
T-stat: Thermostat
A thermostat controls your HVAC system’s temperature settings. Modern models include programmable and smart thermostats that offer precise control and energy savings.
VAV: Variable Air Volume
VAV systems adjust airflow to different zones within a building, allowing for tailored temperature control and increased energy efficiency.
VRF: Variable Refrigerant Flow
VRF systems control refrigerant flow to different zones, enhancing efficiency and providing flexible heating and cooling options.
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Whether you need home heating oil or Bioheat delivery, or installation and service of oil & natural gas systems for HVAC, heating, and cooling—call us at 781-893-9191 or email us.