Offline-First
EPA Compliance
for the Field
Track Section 608 & Subpart C compliance, calculate leak rates, complete A2L safety checklists, and manage your HVAC business — all from your iPhone, with or without a signal.
Free tier available. No credit card required.
Everything a Solo Tech Needs
From compliance logging to professional invoicing — FieldPad replaces your clipboard, calculator, and filing cabinet.
OCR Cylinder Scanning
Point your camera at a refrigerant cylinder label and FieldPad reads the serial number, refrigerant type, and weight automatically using on-device Vision OCR. No images are stored or transmitted.
5,000 Rule Calculator
Instantly calculate whether to repair or replace refrigeration equipment using the EPA's 5,000 Rule. Enter the refrigerant cost per pound and equipment age to get a clear recommendation.
A2L Safety Checklists
6 mandatory safety checks for flammable A2L refrigerants like R-454B and R-32: dissipation risk, spark-free tools, ventilation, PPE, leak detector, and grounding — all logged digitally.
Leak Rate Calculations
Automatic annualized (Method 1) and screening (Method 2) leak rate calculations. Compares against Section 608 and Subpart C thresholds with instant pass/fail indicators.
Professional Invoicing
Generate professional PDF invoices with digital signatures, split labor/material tax rates, partial payments, and refrigerant line items that track type and pounds used per job.
Offline-First Architecture
Every feature works without connectivity. Data is stored locally on your device and syncs automatically via iCloud when you're back online. No account required, no servers to depend on.
How FieldPad Works for Section 608 & Subpart C
FieldPad automatically detects which regulatory framework applies based on the refrigerant's GWP value — so you always track against the right thresholds.
Log Service
Record recovery, recharge, leak test, or repair events with refrigerant details
Auto-Calculate
Leak rates computed using Method 1 or 2 against Section 608 or Subpart C thresholds
Track Repairs
30-day repair deadlines, verification tests, and inspection schedules tracked automatically
Get Alerts
Notifications for deadlines, chronic leaker warnings, and verification follow-ups
Export Reports
PDF, CSV, or JSON exports for EPA audits and state regulatory reviews
EPA Leak Rate Thresholds Tracked by FieldPad
| Appliance Type | Section 608 Threshold | Subpart C Threshold | Charge Minimum |
|---|---|---|---|
| Commercial Refrigeration | 20% | 20% | 608: ≥50 lbs • C: ≥15 lbs |
| Comfort Cooling (AC) | 15% | 10% | 608: ≥50 lbs • C: ≥15 lbs |
| Industrial Process | 30% | 30% | 608: ≥50 lbs • C: ≥15 lbs |
| Refrigerated Transport | N/A | 10% | C: ≥15 lbs (GWP > 53) |
Glove Mode: Tap Accurately with Work Gloves On
FieldPad's Glove Mode enlarges every button, text field, and interactive element to a minimum of 48-point touch targets. Log compliance data, scan cylinders, and create invoices without taking your gloves off.
- 48pt minimum touch targets on all interactive elements
- Enlarged text fields with generous padding
- Haptic feedback confirms every action
- Works on iPhone and iPad
Start Free, Upgrade When You Grow
FieldPad's free tier is fully functional for solo techs starting out. Upgrade to Pro when you need unlimited records and advanced features.
Free
Get started with EPA compliance tracking
- 5 clients, 10 jobs, 10 invoices
- 20 compliance logs, 5 estimates
- Leak rate calculations
- 15 OCR scans, 8 PDF generations
- iCloud sync & Glove Mode
FieldPad Pro
Unlimited everything for growing businesses
- Unlimited clients, jobs, invoices, estimates
- Unlimited compliance logs & cylinders
- Unlimited OCR scans & PDF generation
- Data export (JSON/CSV) & compliance export
- Recurring jobs, business logo, full signatures
HVAC Compliance & Business Resources
Expert guides on EPA regulations, A2L safety, and running a successful solo HVAC business.
Understanding Refrigerant GWP Values: A Quick Reference for Field Technicians
Global Warming Potential (GWP) is the key factor determining which EPA regulatory framework applies to a refrigerant. Under the AIM Act, Subpart C applies to HFC refrigerants with GWP above...
complianceVerification Test Requirements: Initial and Follow-Up Leak Testing Under Section 608 and Subpart C
After repairing a refrigerant leak on regulated equipment, EPA regulations require technicians to perform verification tests to confirm the repair was successful. An initial verification test must be conducted immediately...
complianceEPA Record-Keeping Requirements: What Solo Techs Must Document and Retain
EPA regulations require HVAC technicians to maintain detailed records of all refrigerant handling activities for a minimum of 3 years. Required documentation includes service dates, refrigerant types and quantities recovered...
safetyEmergency Response Procedures for Refrigerant Leaks: A Solo Tech's Protocol
Refrigerant leaks in enclosed spaces can create oxygen-depleted or flammable atmospheres that pose immediate safety risks. Solo HVAC technicians must have a clear emergency response protocol: evacuate the area if...
businessTime Management for Solo HVAC Technicians: Balancing Service Calls and Paperwork
Solo HVAC technicians juggle two roles: field technician and business owner. Every hour spent on paperwork, compliance documentation, and invoicing is an hour not spent on billable service calls. Effective...
complianceUnderstanding Full Charge Determination Methods for EPA Compliance
Accurate full charge determination is the foundation of EPA leak rate calculations. The full charge is the total amount of refrigerant required for a system to operate at designed capacity....
safetyRefrigerant Cylinder Handling and Storage: Safety Guidelines for Field Techs
Proper refrigerant cylinder handling is critical for both safety and EPA compliance. Cylinders must be transported upright and secured, stored in well-ventilated areas away from heat sources, and never filled...
toolsOffline-First HVAC Apps: Why Connectivity Shouldn't Limit Your Compliance Tracking
HVAC technicians frequently work in basements, mechanical rooms, rooftops, and rural locations where cellular connectivity is unreliable or nonexistent. Cloud-dependent apps that require an internet connection for basic functions leave...
complianceA Complete Guide to EPA Chronic Leaker Reporting Requirements
Under EPA regulations, refrigeration or AC equipment is classified as a chronic leaker when cumulative refrigerant additions in a calendar year exceed 125% of the equipment's full charge. Once triggered,...
businessBuilding a Repeat Client Base as a Solo HVAC Service Technician
For solo HVAC technicians, repeat clients are the foundation of a sustainable business. Acquiring a new client costs 5-7 times more than retaining an existing one. Building a repeat client...
safetySafe Recovery Procedures: Best Practices for ODS and HFC Refrigerants
Refrigerant recovery is a core competency for EPA Section 608-certified technicians. Safe recovery requires proper equipment rated for the specific refrigerant type, clean and appropriately labeled recovery cylinders, and careful...
businessCreating Professional HVAC Service Invoices That Get Paid Faster
Professional invoicing directly impacts a solo HVAC technician's cash flow. Invoices that clearly itemize labor hours, material costs, refrigerant usage, and applicable taxes get paid faster and generate fewer disputes....
complianceThe 5,000 Rule Explained: When to Repair vs Replace Refrigeration Equipment
The 5,000 Rule is an EPA guideline that helps HVAC technicians decide whether to repair or replace leaking refrigeration equipment. The calculation multiplies the cost of refrigerant per pound by...
businessManaging Your Refrigerant Cylinder Inventory: A Solo Tech's Strategy
Refrigerant inventory management is both a business necessity and a compliance requirement for solo HVAC technicians. Carrying the right mix of refrigerants (R-410A, R-22, R-454B, R-32) without overstocking ties up...
safetyPPE Requirements for Handling Modern Refrigerants: A Field Guide
Proper personal protective equipment (PPE) is essential for HVAC technicians handling refrigerants. Minimum PPE for all refrigerant work includes safety glasses or goggles, insulated gloves rated for cold contact, and...
toolsPreparing for an EPA Audit: Documentation Every Solo Tech Needs Ready
EPA compliance audits can happen with or without advance notice, and the consequences of inadequate documentation are severe — fines can reach $44,539 per day per violation. Solo HVAC technicians...
complianceLeak Rate Calculations Demystified: Method 1 vs Method 2 for Field Technicians
EPA requires HVAC technicians to calculate leak rates when servicing regulated refrigeration and AC equipment. Method 1 (Annualized) uses the formula: (refrigerant added ÷ full charge) × (365 ÷ days...
businessSetting Competitive Service Rates as an Independent HVAC Technician
Pricing is one of the most critical business decisions for independent HVAC technicians. Your rates must cover operating costs (vehicle, tools, insurance, certification), provide a living wage, and remain competitive...
safetyR-454B and R-32: What Every HVAC Tech Needs to Know About A2L Refrigerants
R-454B (GWP 466) and R-32 (GWP 675) are A2L-classified refrigerants replacing R-410A (GWP 2088) in new HVAC equipment as part of the AIM Act's HFC phasedown. Unlike R-410A, these refrigerants...
complianceSubpart C vs Section 608: Understanding the New HFC Leak Repair Thresholds
Since January 1, 2026, HVAC technicians must comply with two separate EPA regulatory frameworks: Section 608 for ODS refrigerants (like R-22) in systems with 50+ lbs of charge, and Subpart...
toolsGoing Digital: Why Solo HVAC Techs Are Switching from Paper to App-Based Record Keeping
Solo HVAC technicians who switch from paper-based record keeping to digital apps report significant improvements in compliance documentation accuracy, invoicing speed, and audit readiness. Paper records are vulnerable to loss,...
safetyA2L Refrigerant Safety: 6 Mandatory Steps for Your Digital Compliance Log
A2L refrigerants like R-454B, R-32, and R-452B are classified as mildly flammable under ASHRAE 34. Servicing A2L systems requires six mandatory safety steps: (1) confirming dissipation risk assessment, (2) verifying...
businessHandling Client Expectations While On-Site: A Solo HVAC Pro's Guide
Managing client expectations is one of the biggest challenges for solo HVAC technicians. Unlike larger companies with dedicated dispatchers and customer service teams, solo techs must handle client communication alongside...
complianceThe Solo Tech's Complete Guide to EPA Section 608 Compliance in 2026
EPA Section 608 of the Clean Air Act regulates the handling of ozone-depleting substance (ODS) refrigerants in HVAC and refrigeration systems. For solo technicians servicing systems with 50 or more...
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