CR-Tech: HVAC Field Toolkit

Nine field calculators: superheat, subcooling, PT charts, tonnage, airflow, TXV sizing. Plus an offline library of rental HVAC manuals. No signal needed.

CR-Tech is an offline toolkit for HVAC technicians who service Carrier rental chillers and rooftop units. Basements, mech rooms, anywhere the bars drop out.

No account required. Tap "Start Using CR-Tech" on the welcome screen and everything below is available immediately, no setup.

NINE CALCULATORS BUILT FOR THE TRUCK Type your readings in, get your number:

• Superheat: fixed-orifice and TXV
• Subcooling
• PT Chart: bubble/dew columns for blends, plus R-1233zd(E) and R-514A for low-pressure and vacuum work. 11 refrigerants.
• Tonnage
• Airflow
• Electrical load: sizes off motor starting current, not just running load
• Nitrogen test
• Pipe sizing
• TXV sizing

Every calculator takes typed pressures and temperatures. No Bluetooth gauges or extra hardware needed.

OFFLINE MANUAL LIBRARY 25 Carrier rental equipment service manuals are bundled directly into the app and open in airplane mode. Search runs on-device across all 52 manuals. Pull a fault code or a wiring diagram with no bars.

READABLE WITH GLOVES ON Big type, big tap targets, color-coded results. Built to be read at arm's length in bad light.

CR-Tech is an independent tool and is not affiliated with, endorsed by, or sponsored by Carrier Global Corporation. Carrier service documentation is included under written permission held by the developer.