Use the figures below to start planning time off, a move-in, or access to a rental property. Zarts will review the estimate against your property details before booking. Tell us about firm departure deadlines when requesting a quote so the full visit can be scheduled appropriately.
Starting estimates by home size and system count
The starting formula is: estimated hours = square footage ÷ 500 + number of HVAC systems. The extra system allowance applies to every system, including the first. These examples cover the full planned visit, including setup and cleanup; confirm the scope and access before using them as your appointment window.
Zarts also uses roughly 3,000–3,500 square feet as a typical day’s planning capacity for one continuous residential job. Larger properties, multiple systems, or complex access need an individually agreed schedule. This is an approximation, not a fixed daily limit or a completion guarantee.
- 1,000 square feet, one system: about 3 hours.
- 2,000 square feet, one system: about 5 hours.
- 2,000 square feet, two systems: about 6 hours.
- 3,000 square feet, one system: about 7 hours.
- 3,500 square feet, one system: about 8 hours.
Why the same time estimate does not fit every home
NADCA’s homeowner FAQ identifies home size, system count, contamination, and the number of cleaners as timing variables. Its guidance does not prescribe a universal duration. The square-footage-plus-systems formula is Zarts’ own planning estimate, not a NADCA standard or a guaranteed completion time.
A heavily soiled system can take longer because removing substantial deposits requires additional work. In that case, the initial time estimate and the usual daily area may need to be adjusted. For your quote, describe the number of systems if known, recent renovation, and visible buildup. Register count helps explain the layout, while concealed branches and return paths can add complexity that square footage alone does not describe.
What belongs in the appointment window?
The visit starts with a walkthrough to confirm the agreed work. Equipment must be positioned and a collection connection established. Zarts uses portable negative-pressure equipment with HEPA final filtration and controlled compressed-air agitation. Moving and connecting that equipment is part of the appointment.
The estimate also needs to cover reassembly, cleanup, and a review of completed work and inaccessible sections. Ask when cooling may be interrupted. Duct repair or specialized HVAC equipment work may require another appointment; confirm the scope before scheduling other contractors alongside the cleaning.
A smaller home can still have slower access
A single-story house with nearby parking and accessible equipment presents different logistics from a smaller upstairs condo with stairs and a long walk from the unloading area. A townhome may involve moving tools between levels and reaching openings above furniture.
Tell Zarts about the floor, stairs, parking distance, locked service areas, and community service-hour restrictions. Resolving these details before arrival helps avoid delays locating keys, contacting management, or moving equipment to a different entrance.
Does a longer cleaning mean a better result?
A longer visit may reflect access difficulties; a shorter one may reflect a simpler layout. Neither proves quality. The EPA recommends a written agreement describing scope and total cost, and emphasizes visual inspection when assessing the completed cleaning.
Ask which components are shown in before-and-after photographs and which could not be reached. One photograph does not document every duct. The related guide on what to expect during air duct cleaning explains the service sequence in more detail.
Prepare the visit without taking equipment apart
Clear ordinary belongings from the equipment route and around accessible registers. Discuss heavy furniture beforehand. Leave covers and equipment in place for the technician, keep pets away from the route, and arrange for someone authorized to approve the scope and receive the final explanation.
Provide photos only from safely accessible positions. You do not need to enter an attic, climb onto a roof, or open HVAC equipment for a time estimate. Arrange required parking or building approvals ahead of the visit.
Adding dryer vent cleaning changes the schedule
Dryer exhaust is separate from the home’s heating and cooling ducts. Ask for a combined appointment estimate if you need both services. Dryer location, connection access, and the exterior termination can affect the plan. The air duct estimate does not automatically include dryer vent cleaning.
Send Zarts your city, square footage, system count if known, service selection, and access notes. For the planned December 2026 Tampa launch, use the advance quote form; the service date and appointment window will be confirmed before booking.
Need help evaluating your system?
Call or text Zarts with your property details and the condition you are seeing. We will explain the likely scope and any access information needed for a clear quote.
Sources and further reading
These primary sources support the general consumer and system information in this guide. They do not endorse Zarts or replace evaluation of a specific home.