An air duct cleaning quote should identify the systems, ductwork, and components it covers. Before comparing totals for your Utah home, check whether each contractor is quoting the same work. A price for a limited number of vents can leave you with a different scope than a quote that includes the supply ducts, return ducts, and connected equipment.

The useful starting point is a written estimate for your home. A national price range cannot tell you what Larsen will charge, what your system needs, or which items a particular offer includes. Larsen’s air duct cleaning service page provides the service contact if you want to discuss your home.

Start with the number of systems and the areas they serve

Tell each contractor how many furnaces or air handlers you have and which parts of the home they serve. If you are unsure, ask the contractor to confirm during the assessment. Also mention a finished basement, an addition, or a separate heating and cooling system serving part of the house.

NADCA’s cost and time guidance identifies system count, system size, access, duct type, and contamination among the factors that affect a cleaning quote. Square footage gives the contractor context, but the estimate should describe the actual systems being cleaned.

For a home with two systems, ask whether the total covers both. If you want only one assessed or cleaned, have the proposal identify it by location and the area it serves. This avoids comparing a one-system price with a two-system price.

Check what “duct cleaning” includes

Ask for the supply and return sides to be listed separately. Supply ducts carry conditioned air to rooms; return ducts bring air back to the equipment. Have the contractor explain whether the quoted vent count includes both types of openings and whether it includes the larger ducts they connect to.

A description such as “all vents” still leaves questions about the equipment. Ask which of these are included, excluded, or subject to a separate assessment:

  • Supply and return ducts, including main trunks and branches.
  • Registers, return grilles, and the chambers connecting ducts to the equipment.
  • Blower assembly and air handler housing.
  • Cooling coil and drain pan.
  • Other components the contractor recommends cleaning.

NADCA’s cleaning guidance discusses whole-system cleaning and access to duct interiors. Use it to ask specific questions about the proposed scope. A component being part of the HVAC system does not establish that cleaning it is included in your estimate.

Keep duct repairs, duct sealing, filter replacement, dryer vent cleaning, and equipment repairs clearly identified if they are offered. Ask for each item’s purpose and price. Do not assume that a duct-cleaning total covers these separate jobs.

Ask how access and duct condition affect the work

Describe where the equipment is located and any known access restrictions. A narrow crawlspace, an attic installation, or ductwork behind finished surfaces gives the contractor details to evaluate before quoting the job.

Ask whether existing openings provide sufficient access. If the proposal calls for new service openings, have it state where they are needed, whether their creation and closure are included, and who handles any finish repairs. NADCA notes that cleaning can require access openings and that closing them requires professional skill.

The contractor should also explain how the duct material and condition affect the proposed cleaning. Request a separate explanation and price for any damaged section they recommend repairing or replacing. Cleaning, repair, and replacement should each have a defined scope before you authorize them.

Separate cleaning from optional treatments

If an estimate includes a sanitizer, deodorizer, sealant, or another chemical treatment, ask for its product name, purpose, location of application, and separate price. Ask what finding supports its use and whether you can approve the cleaning without purchasing the treatment.

EPA advises homeowners to understand the proposed use of chemical treatments before agreeing to them. Its air duct cleaning guidance explains the evidence limits and questions to consider. A treatment recommendation should come with an explanation you can evaluate before work begins.

Compare the written scope beside the total

Put the proposals next to each other and check these details before choosing:

  • Which systems and areas of the house will be cleaned?
  • Are supply ducts, return ducts, and their main trunks included?
  • Which equipment components are included, excluded, or priced separately?
  • What access work and closure are included?
  • What cleaning approach is proposed, and how will the home be protected during the work?
  • What is the total for that scope, including any stated fees and taxes?
  • What could change the price, and how will extra work be approved?
  • What completion check will the contractor provide?

For an hourly estimate, ask for the expected duration and the basis of the estimate. For a flat price, clarify the system or vent limits and the charges for exceeding them. Have the contractor resolve missing answers in writing so you can compare the revised proposals.

For example, if one proposal lists only supply openings and another includes supply and return ductwork, ask the first contractor to price the missing scope. You can then see whether the totals still differ after both describe the same work.

Agree on how extra work will be authorized

Before the visit, ask what happens if the crew finds a condition outside the estimate. Request that they explain the finding, identify the affected location, and provide the proposed work and added price before proceeding. Make clear who can authorize that change.

If the recommendation grows from cleaning into repairs or treatment, ask for it as a separate written decision. You can request an explanation or another assessment before approving additional work. Keep the original estimate and any approved changes together, then compare them with the final invoice.

When contacting Larsen, share the number of systems you know about, their locations, and the reason you are considering cleaning. Ask for the scope and exclusions in writing before you schedule the work.