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Refrigerant Leak Source-Aware CO2e Screen

Screen refrigerant leak CO2e before GWP-basis, EPA Section 608, GHGRP, and qualified-review checks

Screen the CO2-equivalent impact of refrigerant leaks using local IPCC AR5 100-year GWP planning rows. Enter refrigerant type, direct leaked pounds, or system full charge plus a leak-rate prompt to see deterministic MT CO2e arithmetic. The page surfaces EPA Section 608, GHGRP, AIM/SNAP, GWP-basis, and qualified-review warnings; it is not a leak-repair, reporting, substitute-approval, or compliance workflow.

Pro Tip: R-410A is a good example of why the GWP basis must be visible: this app uses a local AR5 value of 1924, while many product-data and AR4 examples use 2088. A 50 lb leak is 43.64 MT CO2e on the AR5 basis, while an AR4/product-data basis gives a different result. Confirm the required basis before inventory, permit, state, customer, or corporate reporting use.

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Refrigerant Leak Source-Aware CO2e Screen
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How It Works

  1. Select Refrigerant Type

    Choose a local refrigerant row and review the displayed GWP basis. Common local AR5 rows include R-410A (1924), R-134a (1300), R-22 (1760), and R-404A (3943).

  2. Enter Direct Loss or Charge x Rate

    Use direct leaked pounds, or enter a system full charge and a simple annual leak-rate prompt. The app does not calculate the EPA annualized leak-rate method or verify service records.

  3. Add Multiple Entries

    Add HVAC or refrigeration entries to screen local CO2e arithmetic across refrigerants. Keep the result separate from formal inventory and compliance methods until the applicable program is selected.

  4. Review CO2e and Warnings

    Read the MT CO2e result together with GWP-basis, Section 608, GHGRP, AIM/SNAP, equipment, and qualified-review warnings.

  5. Verify Before Action

    Use current EPA, eCFR, manufacturer, SDS, code/AHJ, state, reporting-program, and qualified HVAC/environmental/legal review before leak repair, reporting, purchasing, or transition decisions.

Built For

  • Facility teams screening refrigerant leak CO2e before Section 608 record and repair review
  • Corporate sustainability teams checking GWP-basis assumptions before Scope 1 inventory work
  • HVAC contractors organizing source prompts without treating the app as a service procedure
  • Environmental consultants separating facility leak inventory prompts from GHGRP supplier Subpart OO context
  • Property managers evaluating which equipment needs source-record review across a portfolio
  • Maintenance directors preparing questions for refrigerant transition review without approving substitutions

Assumptions

  • GWP values are local IPCC Fifth Assessment Report (AR5) 100-year planning rows unless noted otherwise.
  • Leak rate prompt is expressed as a simple percentage of entered full charge; it is not the full EPA annualized leak-rate method.
  • All leaked refrigerant is assumed emitted to the atmosphere (no recovery).
  • System charge remains constant (leaked refrigerant is replaced during service).
  • Refrigerant blends use local composite GWP rows that must be reconciled against the required program basis before reporting.

Limitations

  • GHGRP applicability is source-category specific, and Subpart OO is a supplier category rather than a generic facility refrigerant-leak rule.
  • Does not account for refrigerant decomposition products or secondary atmospheric effects.
  • Leak rate estimates based on purchase records may undercount slow chronic leaks.
  • Does not model the effect of leak location (high-side vs. low-side) on leak rate.
  • Does not approve refrigerant transitions, low-GWP alternatives, SNAP acceptability, equipment compatibility, warranty, or safe service work.

References

  • IPCC Fifth Assessment Report (AR5) - GWP values for refrigerants.
  • EPA 40 CFR Part 82, Subpart F - Section 608 refrigerant management requirements.
  • EPA Greenhouse Gas Equivalencies Calculator - public communication equivalencies only.
  • EPA GHGRP overview and Subpart OO information sheet - source-category and supplier-category boundaries.
  • AIM Act / EPA HFC phasedown FAQ and SNAP Q&A - source context only, not substitute approval.

Frequently Asked Questions

GWP compares a gas to CO2 over a selected time horizon, often 100 years. The required value depends on the source basis. For example, this app uses a local AR5 R-410A row of 1924, while older AR4/product-data examples often use 2088. Verify the required table before reporting or regulated use.
Current 40 CFR 82.157 uses appliance category, full charge, refrigerant status, annualized leak-rate method, repair timing, verification tests, and records. The app flags entered charge and rate prompts near common 10%, 20%, and 30% screens, but it does not determine compliance, repair deadlines, penalties, or whether a retrofit/retirement plan is required.
Local arithmetic is CO2e (metric tons) = refrigerant leaked (lb) × GWP ÷ 2204.6. On this app's AR5 planning basis, leaking 50 lb of R-410A gives 50 × 1924 ÷ 2204.6 = 43.64 MT CO2e. A different reporting program may require a different GWP basis.
High-GWP local rows such as R-404A and R-507A can dominate inventory screens, but ranking depends on the selected GWP basis and exact gas identity. Lower-GWP alternatives still require EPA SNAP/Technology Transitions, equipment listing, manufacturer, code/AHJ, safety, and qualified HVAC review before use.
This app does not determine GHGRP applicability. EPA GHGRP reporting depends on covered source categories, thresholds, exemptions, and Part 98 methods. Subpart OO is a supplier category for industrial greenhouse gases, not a generic facility leak-inventory rule. State, permit, corporate, and customer reporting programs may also apply.
The AIM Act directs EPA to phase down HFC production and consumption and supports sector-based transition rules. This screen only provides warning context; it does not approve a substitute, retrofit, equipment choice, purchase, or service action.
Disclaimer: This screen uses local IPCC AR5 100-year GWP planning rows for deterministic CO2e arithmetic. It is not an EPA Section 608 compliance determination, GHGRP filing workflow, state inventory method, corporate inventory assurance, leak-repair instruction, substitute approval, retrofit approval, safety approval, or legal/regulatory advice. Verify refrigerant identity, GWP basis, service records, current EPA/eCFR rules, state/local rules, manufacturer documentation, code/AHJ, and qualified HVAC/environmental/legal/safety review before regulated or field reliance.

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