Trimvane Email me the link

Air balance report app Every outlet against design. One signed report.

Trimvane is an offline app for HVAC test, adjust and balance technicians. Enter design and measured airflow outlet by outlet, traverse the ducts, read the fans, VAV boxes, pumps and balancing valves, and produce the TAB report before you leave the site.

Email me when it's live

Free for your first project. $99.99 one time to unlock, no subscription. Coming soon; launching November 2026.

RTU-1, supply outlets

Final airflow against design, ±10% band

Design and final airflow of four of the twelve outlets
OutletDesignFinalResult
S-1Reception350362103%
S-5Open office350368105%
S-8Conference 21035030587%
S-10Office 20630029699%
System totals
Traverse T-14,014 CFM, 100% of 4,000 design
Outlet total3,964 CFM, 1.3% below the traverse
DeficiencyS-8 87% of design, branch damper full open
Sample job with illustrative data. Tolerances follow the project's spec.

TAB reports today

  • Readings on paper or in a hood's memory, then typed into Excel forms at night.
  • Traverse math, fan laws and valve flows worked out by hand or in separate calculator apps.
  • TAB report software is a cloud subscription priced per user per month.

What Trimvane does

  • Outlets against design

    Initial and final readings, percent of design as you type, and every outlet on one tolerance band.

  • Duct traverses

    Log-Tchebycheff, log-linear and equal-area points with hole depths, density-corrected velocity, and the plane quality test.

  • Fans, motors and VAV boxes

    Static pressures, sheaves and belt slip, volts and amps per leg, BHP, fan-law targets, and VAV setpoints against the controller.

  • Pumps, coils and valves

    Pump head and flow off the curve, coil capacity at test conditions, and circuit setters from Cv or Kv and the pressure drop.

  • The report the engineer expects

    Certification page with your stamp, contents with page numbers, deficiencies, instrument list and data sheets.

Inside Trimvane

  • Trimvane app screen: Every outlet against design. The tolerance band shows what's out at a glance.
    Every outlet against design
  • Trimvane app screen: A report the engineer accepts. Certification page, contents, deficiencies, data sheets.
    A report the engineer accepts
  • Trimvane app screen: One outlet at a time. Initial and final readings, % of design as you type.
    One outlet at a time
  • Trimvane app screen: Duct traverses, done right. Log-T points, hole depths, density-corrected CFM.
    Duct traverses, done right

How it works

  1. Set up the job

    Systems, outlets and design figures, typed or pasted from the schedule. Works offline.

  2. Read and adjust

    Outlet by outlet, traverse by traverse; what's out of tolerance shows at once.

  3. Sign the report

    Summary, deficiencies, instruments and every data sheet, with your stamp and signature.

Price

Try it

Free

For your first project. Every screen works; reports are marked Trial.

Trimvane Pro

$99.99

One time, through the App Store or Google Play. Unlimited projects and clean, branded reports.

No subscription. No per-report fees from us. TAB report software is usually a cloud subscription, $79 to $129 per user per month. Trimvane is one purchase for your phone or tablet.

Get the link when it's live

Trimvane is coming to the App Store and Google Play. Leave your email and we'll send you the download link the day it's approved.

We only email you about Trimvane and never share your address. Privacy policy

Questions

Does it work offline?

Yes. Everything in Trimvane, including photos and PDF reports, works with no signal. It never needs a connection to do its job.

Is it for iPhone or Android?

Both. Trimvane runs on iPhone and iPad, and on Android phones and tablets.

Is there a subscription?

No. You pay once through the App Store or Google Play and own it. No monthly fee, and no per-report fee from us.

Where is my data stored?

On your device. There is no account and no cloud server holding your jobs. Your data, photos and reports stay on your phone or tablet until you choose to share them, so keep your device backed up.

When can I get it?

Trimvane is coming to the App Store and Google Play soon. Leave your email and we'll send you the link as soon as it's live.

Can I get a refund?

You buy through the App Store or Google Play, so refunds follow Apple's and Google's policies. Try it free on one project first: every screen works, and reports are marked Trial until you unlock.

Does it follow NEBB, AABC or TABB?

You choose your certifying body and edition per project. Trimvane sets the report title and labels to suit, and the tolerances start from that body's usual values, which you change to the project spec. With NEBB you paste the certification statement from your current Procedural Standard.

Does it work with my instruments?

Yes, any brand: you type the readings in. There is no instrument connection. The instrument list in the report records each instrument's serial number and calibration dates and flags any that were out of date on your test days.