Air Duct Cleaning Glossary

Everett homeowners: this glossary decodes the 12 most important air-duct and HVAC terms you’ll hear when booking a white-glove cleaning or tune-up. Knowing these words helps you compare quotes, spot inefficiencies, and protect your family’s air quality—before dust, pollen, or hidden mold circulate through your vents.

Reyes Air Duct Cleaning Inc. serves Everett and the North Shore with meticulous, craftsman-grade ductwork cleaning backed by a 100 % satisfaction guarantee. Whether you’re upgrading an old system or just want cleaner indoor air, understanding these terms ensures you ask the right questions. Explore our full services lineup, request a free estimate today, or see what sets us apart on our about page.

SEER rating

SEER stands for Seasonal Energy Efficiency Ratio. It measures how efficiently a central air-conditioner cools your Everett home over an entire season. A higher SEER (16 or above) means lower monthly bills and a quieter, gentler system. If your unit is older than 10 years, upgrading can cut cooling costs by 30 % or more—especially during Everett’s humid summers.

AFUE

AFUE is Annual Fuel Utilization Efficiency. It tells you how much of the fuel burned by your furnace actually heats your home instead of going up the flue. An AFUE of 90 % means 90 cents of every dollar spent on gas becomes warmth. Older furnaces in Everett often drop below 70 %, so upgrading can slash winter heating bills while improving comfort.

Heat pump

A heat pump is a two-way HVAC system that both heats your Everett home in winter and cools it in summer. It moves heat rather than creating it, making it far more efficient than electric resistance heat. Modern cold-climate heat pumps now work reliably even when outdoor temps dip below freezing, keeping your ducts cleaner by reducing dust-churning temperature swings.

Air handler

The air handler is the indoor unit that pushes conditioned air through your Everett home’s ductwork. It houses the blower motor, evaporator coil, and air filter. A dirty or failing air handler can circulate dust and allergens every time the system runs, so regular HVAC coil & blower cleaning keeps indoor air quality pristine.

Condenser

The condenser is the outdoor unit of your central AC or heat pump. It releases heat absorbed from inside your Everett home into the outside air. Keeping the condenser coils clean and free of leaves or salt spray is critical—dirty coils force the system to work harder, shorten its life, and can leave your ducts clogged with extra dust.

Evaporator coil

The evaporator coil sits inside the air handler and absorbs heat from the air blown across it. Over time, it collects condensation that can foster mold growth. A fouled coil lowers cooling efficiency and can spread musty odors through your Everett home’s vents—regular duct cleaning keeps it operating like new.

Refrigerant

Refrigerant is the chemical that absorbs and releases heat as it circulates through your Everett home’s AC or heat pump. Low refrigerant levels cause the system to run longer, ice up, and circulate less air—all of which push dust and humidity through your ductwork. A certified pro should recharge it, never a DIYer.

BTU

BTU stands for British Thermal Unit. It measures the amount of heat needed to raise the temperature of one pound of water by one degree Fahrenheit. In HVAC terms, it tells you how much heating or cooling power a unit delivers. A 36,000-BTU furnace can comfortably heat a 1,500 sq ft Everett home on the coldest winter nights.

Ductwork

Ductwork is the network of metal or flexible tubes that carry heated or cooled air from your furnace or AC to every room in your Everett home. Leaky, crushed, or dirty ducts waste energy, reduce comfort, and circulate dust, pollen, and pet dander. Professional air duct cleaning restores airflow and indoor air quality in one meticulous pass.

Zoning

Zoning divides your Everett home into separate temperature-controlled areas using motorized dampers in the ductwork. You can heat or cool only the rooms you’re using, saving energy and reducing wear on your system. Zoning works best when paired with a smart thermostat and properly sealed ductwork.

MERV rating

MERV stands for Minimum Efficiency Reporting Value. It rates how effectively an air filter captures particles between 0.3 and 10 microns. A MERV 8 filter traps dust and pollen, while a MERV 13 filter also catches viruses and smoke. For Everett homes with pets or allergies, upgrading to a higher MERV filter—changed every 3 months—protects both lungs and ducts.

Load calculation (Manual J)

Manual J is the industry-standard formula HVAC pros use to determine exactly how much heating and cooling your Everett home needs. It accounts for square footage, insulation, window orientation, and even local wind patterns. A precise load calculation prevents oversized or undersized systems that waste energy or leave rooms too hot or cold.

Thermostat setback

Thermostat setback is a programmable schedule that automatically raises or lowers the temperature when you’re asleep or away. In Everett, setting back your thermostat by 7–10 °F for eight hours a day can cut annual heating and cooling costs by up to 10 %. Smart thermostats make setback effortless and help keep your ducts from working overtime.

Short cycling

Short cycling happens when your furnace or AC turns on and off too frequently, never reaching full capacity. It’s often caused by a dirty air filter, low refrigerant, or an oversized unit. In Everett, short cycling wastes energy, strains your system, and can leave your ducts coated in moisture-loving mold—schedule a duct inspection to diagnose and fix it.

VOCs (Volatile Organic Compounds)

VOCs are gases emitted by paints, cleaners, and building materials that can linger in your Everett home’s air. High VOC levels irritate lungs and worsen allergy symptoms. A thorough duct cleaning removes accumulated VOCs and replaces your filter with a high-MERV option to keep indoor air fresh year-round.

Static pressure

Static pressure measures how much resistance your ductwork puts on the blower motor. High static pressure forces the system to work harder, increases energy bills, and can blow dust back into living spaces. In older Everett homes with sagging or crushed ducts, correcting static pressure often requires duct sealing and rerouting before cleaning.

Frequently Asked Questions