Air Duct Cleaning Glossary

This glossary decodes the jargon you’ll hear when Lynn’s trusted air-duct cleaners inspect your older home’s brick-lined ducts. We translate SEER, AFUE, zoning and more into plain English so you can spot inefficiencies, avoid costly repairs, and breathe easier in a 19th-century Victorian or 1950s ranch.

Whether your Lynn home still has original masonry ducts or modern flex-duct over brickwork, understanding air-duct terms helps you keep heating and cooling costs in check. Learn what we inspect when we arrive, or see how pricing works before booking. We proudly serve older neighborhoods from Swampscott to Salem and every historic street in between.

SEER rating

SEER stands for Seasonal Energy Efficiency Ratio. It measures how efficiently a central air conditioner cools your Lynn home over an entire season. A higher SEER (16 or above) means lower electric bills and a gentler load on your aging ductwork—critical in older homes where brick liners can crack under extra strain.

AFUE

AFUE, or Annual Fuel Utilization Efficiency, tells you how much of your furnace’s fuel actually becomes heat instead of wasted exhaust. A 90 AFUE furnace turns 90 % of its fuel into warmth; older Lynn homes often drop below 70 AFUE, costing you hundreds each winter. Schedule an efficiency check to see if your system needs an upgrade.

Heat pump

A heat pump moves heat in or out of your home using refrigerant instead of burning fuel. In Lynn’s damp winters, a modern cold-climate heat pump keeps brick-lined ducts from harboring mold while trimming oil-heat bills. Look for models rated above 10 HSPF for best cold-weather performance.

Air handler

Your air handler is the indoor unit that pushes conditioned air through your ductwork. In older Lynn homes, the handler may sit in a cramped attic or closet, so we check for duct leaks and mold growth around the evaporator coil before cleaning the entire system.

Condenser

The outdoor unit that releases heat from refrigerant is called the condenser. If your Lynn home’s condenser sits too close to salt-spray from Nahant Bay, we inspect the coils for corrosion and ensure proper airflow to protect your ducts from overheating.

Evaporator coil

This indoor coil absorbs heat from your home’s air and turns refrigerant into cool gas. Over time, dust and moisture build up on coils in older Lynn homes, reducing efficiency and spreading allergens through cracked masonry ducts. Cleaning the coil is part of our full duct-cleaning package.

Refrigerant

Refrigerant is the chemical that absorbs and releases heat as it cycles through your system. Older Lynn homes may still use R-22 (Freon), which is being phased out; leaks can damage duct liners and require costly repairs. We check refrigerant levels during every duct inspection.

BTU

BTU stands for British Thermal Unit and measures heating or cooling power. A 1-ton air conditioner delivers 12,000 BTUs per hour. In a drafty Lynn Victorian, you may need 60,000 BTUs to keep the parlor comfortable—so we size systems carefully to avoid overworking your ducts.

Ductwork

Ductwork is the network of pipes or channels that carry air from your furnace or AC to every room. In older Lynn homes, ductwork is often original brick or clay tile, prone to leaks and mold. We restore and seal masonry ducts to preserve your home’s character while improving airflow.

Zoning

Zoning divides your home into separate temperature zones controlled by dampers in the ductwork. For a Lynn home with a sunroom and a chilly north-facing bedroom, zoning keeps each space comfortable without overloading the entire system—saving energy and protecting aging ducts.

MERV rating

MERV (Minimum Efficiency Reporting Value) rates how well an air filter traps particles. A MERV 8 filter catches dust and pollen, while MERV 13 handles mold spores common in Lynn’s humid summers. We recommend upgrading filters in older homes to protect brittle masonry ducts.

Load calculation (Manual J)

Manual J is the industry-standard formula that calculates how much heating or cooling your Lynn home needs based on size, insulation, windows, and even the direction your roof faces. Skipping this step can leave you with an oversized system that short-cycles and stresses your ducts.

Thermostat setback

Thermostat setback automatically lowers the temperature when you’re asleep or away, reducing energy waste. In a drafty Lynn home, a smart thermostat with setback can prevent ducts from pulling in humid outdoor air at night, cutting mold risk and bills.

Short cycling

Short cycling happens when your furnace or AC turns on and off too frequently, never reaching full efficiency. In older Lynn homes with leaky masonry ducts, short cycling can pull unfiltered attic air through cracks, spreading dust and allergens throughout your living spaces.

Masonry duct liner

Masonry duct liner is the brick or tile lining inside older Lynn homes’ ductwork. Over time, mortar can crumble and release dust into your air. We repair and reline historic ducts to maintain airflow and indoor air quality without losing your home’s vintage charm.

Duct leakage test

A duct leakage test uses a blower door and pressure diagnostics to find hidden air leaks in your ductwork. In a Lynn home with original plaster walls, even small leaks can pull in radon or outdoor allergens, so we seal them before cleaning to protect your family’s health.

Frequently Asked Questions