How much does air duct cleaning cost?

Our pricing is customized to your home based on size and duct condition. We give you a FREE inspection first — no obligation, no pressure. You'll know the exact flat-rate cost before we start. Beware of $99 'blow-and-go' scams that upcharge you later.

How long does the process take?

A proper, professional-grade cleaning takes 3 to 5 hours for an average-sized home. We use a negative pressure system that requires careful setup to ensure zero dust escapes into your living space.

Will this make a mess in my house?

Absolutely not. Our negative pressure system pulls all debris directly into our specialized truck-mounted or portable HEPA vacuums. We wear shoe covers, use drop cloths, and leave your home cleaner than we found it.

How often should I have my ducts cleaned?

The EPA recommends every 3 to 5 years. However, if you have pets, recent renovations, allergies, or asthma, you may benefit from cleaning every 2 years.

Do you offer emergency or same-day service?

Yes. We have technicians on standby 24/7 for the DMV area. If you suspect a mold issue, have a severe allergy attack, or notice a burning smell from your vents, call us immediately.

What is HVAC zoning and how does it work?

HVAC zoning divides your home into separate temperature-controlled areas (zones) using motorized dampers installed in the ductwork. Each zone has its own thermostat. When one zone calls for heating or cooling, dampers open to that zone and partially close to others, directing conditioned air where it is needed. A zone control panel coordinates the thermostats, dampers, and HVAC equipment. This allows you to maintain 72°F on the main floor and 68°F upstairs simultaneously, for example.

How much does HVAC zoning cost in the DMV?

A basic 2-zone retrofit for an existing system runs $2,000-$3,500 in the DMV area including thermostats, dampers, and the zone control panel. A 3-4 zone system costs $3,500-$6,000. New construction with zoning designed from scratch is cheaper — around $1,500-$2,500 for 2-3 zones since ductwork is already accessible. High-end systems with smart zone controllers (like the Honeywell TrueZONE) and communicating thermostats add $500-$1,000.

Is my home a good candidate for zoning?

Multi-story homes benefit most — the temperature difference between floors in a typical 2-story DMV home can be 5-10°F without zoning. Homes with bonus rooms over garages (common in Loudoun and Prince William County), finished basements, or large open floor plans also benefit. Homes with multiple HVAC systems already have natural zoning and may not need additional zone dampers. Single-story ranch homes under 1,500 sq ft usually do not need zoning.

Does zoning save energy?

Yes, typically 20-30% in heating and cooling costs. Zoning avoids the inefficiency of conditioning empty rooms to the same temperature as occupied ones. If your upstairs bedrooms are unoccupied during the day, you can set that zone to 78°F in summer while keeping the main floor at 72°F. The DOE estimates that each degree of thermostat setback saves about 1% on annual energy costs, so 6 degrees across half your home adds up fast.

Can zoning damage my HVAC system?

Poorly designed zoning can cause problems. If too many zones close simultaneously, static pressure in the ductwork spikes, stressing the blower motor and reducing system efficiency. This is prevented with a bypass damper or dump zone that redirects excess airflow when zones close. Any reputable HVAC contractor will include pressure relief in the zoning design. Also, dampers should never fully close — they should maintain 10-20% minimum airflow to each zone even when not calling for conditioning.

DMV Homeowner Guide

HVAC Zoning Systems Guide

Tired of your upstairs being 8°F hotter than downstairs? HVAC zoning solves the most common comfort complaint in multi-story DMV homes. Here is everything you need to know about whether zoning is right for your home.

The Multi-Story Temperature Problem

Hot air rises. In a two-story DMV home with a single HVAC system and no zoning, the upstairs is consistently 5-10°F warmer than the main floor during summer. The thermostat is usually on the main floor, so it reads 72°F and stops cooling — while bedrooms upstairs bake at 80°F. In winter, the reverse happens: the main floor stays comfortable while upstairs is over-heated and the basement is cold. This is the number one comfort complaint we hear from homeowners in Fairfax, Montgomery, and Prince George's counties.

The traditional solution was to set the thermostat lower in summer, which makes the main floor too cold while barely helping upstairs. Or running the fan continuously, which circulates air but wastes energy. HVAC zoning is the engineering solution — it treats each floor or area independently, delivering the right amount of conditioned air to the right place at the right time.

How Zoning Works with Your Ductwork

Zone Dampers

Motorized dampers are installed in trunk ducts where branches split to different areas. They open and close on command from the zone controller. Round dampers fit inside circular ducts; rectangular dampers install in trunk lines.

Zone Thermostats

Each zone gets its own thermostat or sensor. Smart thermostats like Honeywell T10 Pro or Ecobee with room sensors work well for zoned systems. Place thermostats in the most representative location of each zone.

Zone Control Panel

The brain of the system. It receives temperature demands from each thermostat and sends open/close commands to the corresponding dampers. It also communicates with the HVAC equipment to adjust staging.

Bypass Damper

Critical safety component. When most zones are satisfied and dampers close, excess air pressure needs somewhere to go. The bypass damper redirects air back to the return to prevent static pressure buildup that can damage the blower motor.

Ductwork Requirements

Trunk duct must be sized for full system airflow

Branch ducts must have straight sections for damper installation

Return air paths must be adequate for each zone

Ductwork should be sealed before adding zoning

Existing duct leaks will undermine zone control

Clean ducts ensure dampers operate freely

Important: We recommend professional duct cleaning and leak testing before installing zoning. Dirty ducts or leaky joints will cause zone pressure imbalances and reduce system effectiveness.

Best Candidates for Zoning in the DMV

2-3 Story Colonial Homes

The most common house type in Fairfax and Montgomery counties. Heat stratification between floors is severe. 2-zone system (upstairs/downstairs) is the most impactful upgrade.

Homes with Bonus Rooms

Rooms over garages in Loudoun and Prince William County developments are notoriously hard to heat and cool. A dedicated zone with its own damper and thermostat solves the problem.

Finished Basements

DMV basements often need less cooling but more heating than upper floors. A separate zone prevents over-cooling the basement while trying to cool the rest of the house.

Large Open Floor Plans

Modern homes with vaulted ceilings and open kitchens have massive volume to condition. Zoning allows you to prioritize the living areas during waking hours and bedrooms at night.

HVAC Zoning FAQs

Start with Clean, Sealed Ductwork

Before installing zoning, get your ducts cleaned and tested for leaks. This ensures your new zones perform at maximum efficiency.

Book Duct Assessment (800) 555-0199