The five things contractors ask before signing up.

Google returns forums; the diagnostics tool returns ranked causes grounded in the refrigerant you actually have on the truck.

The free web has every A2L horror story and every ten-year-old R-22 forum thread mixed together. The diagnostics assistant in ChillFlow reads the symptoms you enter, the refrigerant the cylinder says, and the manufacturer guidance, and ranks the most likely causes in plain language with the safety notes that go with each one. It is the difference between searching the open web and asking a senior tech who knows the refrigerant class. The P/T lookup, the superheat calculator, the airflow calculator, and the static pressure calculator are free without a subscription — the AI diagnostics rulebook is the thing behind the $25/month paywall.

Yes — the field calculators and the diagnostics rules cover residential split systems, light-commercial rooftop units, and the ductless mini-splits in between.

Manual J covers the residential load calcs you would otherwise do on paper; the airflow and static pressure calculators cover the residential and small-commercial duct side; the superheat/subcooling calculator works for residential AC/heat pumps and light-commercial split systems. For commercial refrigeration (walk-ins, reach-ins, larger chillers), the P/T chart covers R-404A, R-507A, R-134a, and the HFO replacements, and the diagnostics rules include the safety notes for those refrigerants. The CRM and price book in the Crew plan were built around the way a three-to-five-tech company actually runs jobs — residential replacements, light-commercial service contracts, and a few mini-splits in between.

Twenty-plus refrigerants across A1, A2L, and A3 — R-410A, R-22, R-134a, R-32, R-454B, R-454C, R-1234yf, R-1234ze(E), the legacy R-12, R-502, and more.

The P/T lookup shows the saturation curve and the safety class (A1, A2L, A3) for each refrigerant, so you read the gauge against the right curve and you know whether you are standing in front of a mildly flammable system before you sweat a joint. Turn the A2L only filter on to see the five A2Ls the AIM Act transition has put on most service trucks today (R-32, R-454B, R-454C, R-1234yf, R-1234ze(E)); toggle it off to fall back to the A1 workhorses. Your inputs encode into the URL — text a coworker the refrigerant, the temperature, and the filter state you used and the chart lands on the exact same view.

The P/T lookup is free — no login required, share-by-URL inputs.

No. ChillFlow runs the AI and the billing on its own accounts — you do not bring your own OpenAI key, and you do not connect a Stripe account.

Subscriptions and one-time charges for the annual plan go through ChillFlow's Stripe Connect account; you do not set up a Stripe account on your end, and you do not pay Stripe fees directly on top of your subscription. The AI diagnostics runs against the assistant ChillFlow operates — your prompts are not billed to an OpenAI key you would otherwise have to provision. Sign up, subscribe, and you are using the tool. Cancel from your account page when you want to stop, no contract, no third-party account to undo.

Your customer records stay in your account, scoped to your user ID; nothing in your data is sold, and nothing feeds a public model. The privacy policy spells out the rest in plain English.

ChillFlow uses better-auth for sign-in (email + password, optional social sign-in), and every CRM row, job, quote, invoice, and refrigerant event scopes to your account via a user ID column — there is no cross-tenant read, no shared database pool a competitor could query, and no customer list sold upstream. AI diagnostics prompts are not retained beyond the request that produced an answer, and the prompt text does not train any model. Read the full privacy policy for the data retention windows, the sub-processor list, and the procedures under which the platform would disclose records.