FieldOS for HVAC

The field CRM for HVAC crews.

Run HVAC jobs from the first visit to getting paid: capture the work in the field, build photo and checklist proof, send the customer a clean record, and run the operation offline. Built on the Anvilfield system, with every free HVAC calculator, checklist, and guide feeding in.

Open FieldOS Start with the free HVAC tools

Works offline. Built for the truck, the roof, and the basement, not just the office.

CaptureProveSendGet paid

How it works

One flow, from the HVAC field to getting paid.

Capture the HVAC job in the field

Log the visit, the customer, the scope, and the readings once. No clipboard, no re-typing it at the truck.

Build the proof as you work

Before-and-after photos, checklists, and sign-offs attach to the job automatically and stay organized by stop.

Send a clean record

One link sends the customer a branded proof page with the photos and the work done, so they see a professional record.

Run the whole operation

Jobs, estimates, change orders, and customer history in one place, offline, syncing when you get signal.

Start free

The free HVAC tools that feed FieldOS.

Every Anvilfield HVAC calculator, readiness check, and field guide is free and works offline. Run them today; capture the job and the proof in FieldOS when you are ready.

Duct airflow calculatorSolve duct airflow and velocity from the duct size using continuity (Q = V x A): enter a round or rectangular duct and either the CFM or the velocity, and get the other.ACH to CFM calculatorFind the airflow for a target air change rate: CFM = room volume x ACH / 60, from floor area and ceiling height.Duct equivalent diameterConvert a rectangular duct to its equal-friction round diameter: De = 1.30 x (a x b)^0.625 / (a + b)^0.250.Ventilation rate calculatorFind the breathing-zone outdoor air a space needs: Vbz = Rp x Pz + Ra x Az.Tons to BTU calculatorConvert a cooling load to tons of refrigeration: tons = BTU per hour divided by 12,000.Dew point calculatorFind the dew point from air temperature and relative humidity, and the surface temperature condensation forms at.HVAC Cx readinessA 2 minute check on whether an HVAC system will actually pass commissioning and run as designed, before the Cx agent and the owner find the problems.Retro-commissioning readinessA 2 minute check on whether your existing building is tuned to work as intended, or quietly drifting and wasting energy.Cold storage readinessA 2 minute check on whether your refrigerated warehouse handles the floor heave, vapor drive, and ammonia risk a walk-in never faces, before the slab cracks or a leak shuts you down.Succession & exit readinessA 2 minute check on whether your business is built to transfer for real value, before the day you want out arrives and you find out it is worth less than you hoped.

All HVAC field guides HVAC calculators HVAC readiness checks

Offline HVAC field apps

BlowerCFMAirflow and commissioning checks for HVAC work.GaugeGate DCDuct gauge, leakage, layout, and balance records.Hood Suppression PacketWet-chemical kitchen-hood semi-annual packets with nozzle maps, link clocks, cylinder date checks, signatures, and AHJ exports.ChargeRightOffline superheat and subcooling calculator giving HVAC/R techs a charge PASS, ADD, or RECOVER verdict.Dryer Airflow TestMeasures commercial dryer airflow, static pressure, and lint restriction and prints a condition report.DryPlan S500Sizes air movers and dehumidifiers for water-damage restoration with S500-derived room-by-room math.

Run your next HVAC job through FieldOS.

Open it in your browser or on the app and capture your next visit, nothing to install to try it. The customer gets a clean, branded proof record: the before-and-after photos, the completed checklist, the work done, and the sign-off, in one link.

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