Air Duct Cleaning Glossary

This glossary decodes 15 essential air duct cleaning terms in plain English so Pitman homeowners can spot small HVAC issues early, protect indoor air quality, and keep systems running efficiently year-round.

If your Pitman home’s air feels stuffy or your energy bills are creeping up, the problem may be hiding inside your ducts. We’ve put together a no-nonsense glossary of the most important air duct cleaning terms you need to know. Whether you live near downtown Pitman or in one of the nearby towns like Glassboro, understanding these terms helps you make smarter maintenance decisions. Ready to breathe easier? See our full service list and contact us for a free estimate.

SEER rating

SEER stands for Seasonal Energy Efficiency Ratio. It measures how efficiently a central air conditioner cools your Pitman home over an entire season. The higher the SEER number, the less electricity the unit uses for the same cooling power. A SEER of 16 or above is considered high-efficiency for most homes in our region. See our full list of services.

AFUE

AFUE, or Annual Fuel Utilization Efficiency, tells you how much of your furnace’s fuel actually becomes heat for your Pitman home. Expressed as a percentage, a 95 AFUE furnace turns 95% of its fuel into heat and loses only 5%. Higher AFUE means lower heating bills and cleaner operation.

Heat pump

A heat pump is a two-way HVAC system that both heats and cools your home by moving heat instead of burning fuel. In summer it acts like an air conditioner, and in winter it pulls warmth from outdoor air. Many Pitman homes use heat pumps for year-round comfort and energy savings.

Air handler

The air handler is the indoor unit that circulates conditioned air through your home’s ductwork. It contains the blower fan, evaporator coil, and air filter. If your Pitman home has a central system, the air handler is usually located in the attic, basement, or utility closet.

Condenser

The condenser is the outdoor unit of your air conditioning or heat pump system. It releases heat absorbed from inside your Pitman home into the outdoor air. Keeping the condenser coil clean and free of debris helps maintain efficiency and prevents short cycling.

Evaporator coil

The evaporator coil sits inside the air handler and absorbs heat from indoor air as refrigerant flows through it. Over time, dust and mold can build up on the coil, reducing cooling power and lowering indoor air quality. Regular duct cleaning helps keep the coil clean and efficient.

Refrigerant

Refrigerant is the chemical that absorbs and releases heat as it circulates through your air conditioning or heat pump system. Low refrigerant levels can cause poor cooling, ice on coils, and higher energy bills. If your Pitman home’s system is low, a professional should recharge it safely.

BTU

BTU stands for British Thermal Unit and measures the heating or cooling power of your HVAC system. One BTU is the energy needed to raise the temperature of one pound of water by one degree Fahrenheit. A higher BTU rating means more heating or cooling capacity for larger Pitman homes.

Ductwork

Ductwork is the network of metal, fiberglass, or flexible tubes that carry heated or cooled air from your furnace or air handler to every room in your Pitman home. Leaky or dirty ducts waste energy and reduce comfort. Inspecting and cleaning ducts every few years helps maintain efficiency and indoor air quality.

Zoning

Zoning divides your Pitman home into separate temperature zones controlled by dampers in the ductwork. Each zone has its own thermostat, so you can heat or cool only the rooms you use. Zoning improves comfort and can cut energy bills by up to 30% in larger homes.

MERV rating

MERV stands for Minimum Efficiency Reporting Value and rates how well an air filter traps particles. A MERV 8 filter catches dust and pollen, while a MERV 13 filter also traps mold spores and smoke. For Pitman homes with allergies or pets, a higher MERV filter can improve indoor air quality.

Load calculation (Manual J)

Manual J is the industry-standard method for calculating how much heating and cooling your Pitman home needs. It considers square footage, insulation, window orientation, and local climate to size your HVAC system correctly. An accurate load calculation prevents oversized or undersized units that waste energy or leave rooms uncomfortable.

Thermostat setback

Thermostat setback is a simple way to save energy by automatically lowering the temperature when you’re asleep or away. A programmable or smart thermostat can reduce your Pitman home’s heating and cooling costs by 10% or more without sacrificing comfort.

Short cycling

Short cycling happens when your HVAC system turns on and off too frequently, never reaching full efficiency. Common causes include a dirty air filter, low refrigerant, or an oversized unit. If your Pitman home’s system short cycles, it’s wasting energy and may need duct cleaning or a professional inspection.

Plenum

The plenum is the large metal box that connects your air handler to the main supply and return ducts. It distributes conditioned air evenly throughout your Pitman home. A leak or blockage in the plenum can cause uneven temperatures and higher energy bills.

HEPA filter

HEPA stands for High-Efficiency Particulate Air. A true HEPA filter traps 99.97% of particles as small as 0.3 microns, including dust, pollen, and some viruses. While not all HVAC systems support HEPA filters, adding one can dramatically improve indoor air quality in Pitman homes with allergies or asthma.

Frequently Asked Questions