How to review an AI-assisted HVAC replacement estimate

Give the same signed-off replacement scope to the guided estimate builder and to an estimator working from your approved templates. Compare the options against the scope before comparing time. If a required item goes missing, a proposed option contradicts the field record, or a site exception loses its owner, hold the draft before it reaches the customer.

What the estimate builder actually does

ServiceTitan documents its Field Mobile App estimate builder as a private preview for specific accounts, limited to HVAC replacement jobs. A technician answers guided questions, the builder proposes tiers from the company's own Pricebook templates, and the technician reviews the options and chooses which to add. The feature requires a Managed Technician license and designated estimate and Pricebook permissions. Ask your account admin to confirm access and identify the approved templates behind the test. This guide reviews the documentation. It reports no account test or measured outcomes. ServiceTitan estimate builder documentation

Use the same company's manual template workflow as your baseline. ServiceTitan documents that technicians can select a template themselves and review its included options. Give both paths the same approved template set and case notes. If the administrator cannot identify which templates the guided workflow can select, log that gap before interpreting the comparison. ServiceTitan manual estimate workflow

Run two samples through both paths

Start with a fictional or appropriately redacted case with a completed technical review, a dated scope and approved replacement options. Then use a second case with a documented site exception awaiting a technical decision. For example, the field record may flag access that an approved template assumes is routine. Keep both samples out of customer-facing workflows and use the same notes and template versions in each path. Record the first draft before making corrections.

1. Scope and tier boundaries. For each option, mark the required inclusions, exclusions and tier differences against the signed-off scope. Record any missing required item, duplicate item, unapproved substitution or difference that customer-facing language fails to explain.
2. Template provenance. Record the template name, version or effective date, and approving owner in your worksheet where they can be verified. Flag any option whose template cannot be traced. Ask the Pricebook owner to resolve stale or unclear templates.
3. Exception and handoff. Record the open field issue, the supporting note, the person who owns the decision and the next action. Hold customer presentation until the qualified technical reviewer resolves the exception and signs off. Let the estimator record who approved the final draft and which options they approved.
4. Review effort. Record assembly minutes, review minutes, substantive corrections and minutes spent transferring context into the manual path. Compare effort only for outputs that reach the same approval standard. Record each result as ready after review, manual rebuild, or held for technical review.

Decide what your team can use in the field

In ServiceTitan's documented workflow, no matching options or missing templates can lead to manual assembly. The builder is unavailable offline, and switching to manual after answering a guided question discards the answers entered so far. Keep the approved scope and exception notes in your existing job record so the estimator can pick up the case. Add a fallback check to the dry run and verify that the next reviewer can recover the context from that record. ServiceTitan estimate builder limits and manual fallback

Use assisted assembly for the tested scope class only after it produces traceable options that the estimator can approve against the signed-off scope. Route recurring template mistakes to the Pricebook owner and unresolved site conditions to the qualified technical reviewer. Keep the manual path ready for unmatched templates or unavailable access. This worksheet covers estimate review and ownership. Equipment selection, load sizing and pricing decisions stay with the contractor's existing approval process.

Sources & evidence

Official sources reviewed November 7, 2026. Vendor materials establish descriptions, not independently measured performance. Original evaluation criteria are our analysis.

1. ServiceTitan estimate builder for the Field Mobile App ↗
2. Create estimates in the ServiceTitan Field Mobile App ↗