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Answers to the questions we hear most from HVAC techs, refrigeration techs, electricians, and contractors.Email usif you don't find what you're looking for — we usually reply within 24 hours.
BTU & Cooling Load and Unit Converter are free with up to 2 saved jobs. Pro unlocks Duct Sizing, Voltage Drop & Wire Size, Refrigerant P-T, Superheat & Subcooling, Sheet Metal Offset, and PlateScan — plus unlimited saved jobs, iCloud sync, and branded PDF export. Techs who installed the app before Duct Sizing moved to Pro keep it free.
BTU/Load: ASHRAE-derived sizing. Duct: ASHRAE friction-rate equation, Manual D simplified. Voltage Drop: NEC voltage-drop formula tied to NEC Table 310.16 ampacity. P-T: manufacturer P-T tables for R-410A, R-32, R-454B, R-22. Sheet Metal: SMACNA HVAC Duct Construction Standards.
The formulas reference published standards, but the App produces estimates for trade-professional use, not certified code submittals. For Manual J residential load submittals, use ACCA-certified software like Wrightsoft or Cool Calc. For NEC code review, defer to your local AHJ.
R-410A, R-32, R-454B, R-22. Saturation tables are baked from manufacturer P-T cards. Linear interpolation for any temperature or pressure within range. If you need a refrigerant we don’t support, email us — we prioritize requests from active users.
Point the camera at the unit’s data plate — or type the model number. PlateScan decodes nominal tonnage and refrigerant from the manufacturer’s model nomenclature (Trane, Goodman, York, Rheem, Lennox, Carrier and family brands) and autofills the right calculator. It runs fully offline, and you confirm every decoded value before it’s used. It’s a typing-saver for legible plates, not a miracle decoder for destroyed ones.
On any result screen, tap Save Job. Name it (e.g. Mall Unit 4 — Charge Check) and pick a category. Free tier saves up to 2 at a time; Pro is unlimited.
The app attempts to sync saved jobs through your private iCloud when available. There is no in-app iCloud Sync switch. Both devices need the same Apple ID and working iCloud access. Sync can be delayed or unavailable; confirm the job appears on the second device before relying on it.
Yes — Pro feature. Open a saved job, tap Share → PDF. Generates a branded PDF with the job name, all input values, the calculated result, and the standard cited for the formula. Hand it to a customer for an estimate or attach to a code submittal.
Deleting the app removes its local saved jobs but does not erase private iCloud records. Settings → Data → Delete All Saved Jobs requests deletion from the active store; cloud deletion still needs successful saving and syncing. See the privacy policy for storage failures and support requests.
Switch in Settings. Imperial is the default. Metric covers most international units — kW, L/s, m³/h, °C, kPa, bar. Every calculator follows the global setting; you can override per-calc.
The light theme is tuned for high contrast in outdoor service work. Dark mode flips automatically with your iOS setting if you prefer it on a rooftop at dusk. Dynamic Type and big numerals make the result screen readable one-handed in gloves.
Yes. Calculations run on your device without internet. StoreKit, private iCloud sync, optional feedback and links you open may use the network.
Yes. The app supports iPad. Private iCloud jobs may sync between devices using the same Apple ID; this does not provide sharing between a tech and a supervisor with different Apple IDs.
$4.99/month or $19.99/year. The annual plan includes a 3-day free trial for new subscribers. Cancel anytime in Settings → Apple ID → Subscriptions, or via Manage Subscription inside the app.
iOS Settings → tap your name → Subscriptions → HVAC Pro → Cancel. You’ll retain Pro access until the end of the current period.
On the paywall, tap Restore Purchases. You must be signed in with the same Apple ID that originally subscribed.
All purchases go through Apple. Refund requests must be submitted at reportaproblem.apple.com. We can’t process refunds directly.
Email us with your iOS version, app version (Settings → About), and what happened. We usually reply within 24 hours.
support@playriot.coDuct sizing is listed as a Pro feature. See the App Store and in-app offer for current access, plans and eligibility.
