Calculate
Field math with the work shown.
Practical tools for temperature split, airflow, electrical power, resistance, duct area, static pressure, and unit conversion—with formulas, units, and assumptions kept visible.
HVAQ by Field Zero is a field-ready mobile toolkit being built for HVAC technicians—bringing practical calculations, equipment capture, technical references, and clearer service documentation into one focused workspace.
Active equipment
Model / confirmed on site
01The field problem
Calculators, manuals, weather, equipment photos, notes, and company software all compete for attention while the technician is still standing at the unit.
HVAQ brings those field tasks into one workspace, then helps move the finished information into the system the company already uses.
02Core direction
Built around the call
Calculate
Practical tools for temperature split, airflow, electrical power, resistance, duct area, static pressure, and unit conversion—with formulas, units, and assumptions kept visible.
Capture
Photograph a nameplate, review the extracted model, serial, electrical, and refrigerant details, then correct anything before it is saved. Technician confirmation remains the final word.
Reference
The long-term equipment workspace is designed to connect confirmed model information with manufacturer manuals, diagrams, fault codes, startup procedures, photos, and field notes.
Document
Structured inputs organize the complaint, readings, findings, work performed, parts, and recommendations into a clean draft—without inventing a diagnosis or measurement.
03Field conditions
No signal required for the essentials.
Core calculations, saved equipment, and drafting tools are being designed for poor mechanical rooms, rooftops, basements, and every other place cellular service fails.
04Future direction
These are directions under consideration—not promises for the first release. Each addition has to earn its place on a real service call.
Refrigerant pressure-temperature data
Superheat and subcooling tools
Psychrometric calculations
Weather-aware job context
Manufacturer literature integrations
Service-report and PDF export
Early access
Working technician, apprentice, contractor, or small service company? Join the list for development updates and future testing opportunities.