Refrigerant Digital Twin
EPA 608 + LEED EAc7 + LL97 HFC ledger
Continuous chiller refrigerant inventory with leak detection, GWP-weighted carbon equivalent, and EPA Section 608 compliance tracking. Most BMS analytics tools ignore refrigerant entirely; for ESG and LL97 reporting it's often the second-largest GHG line item after grid electricity.
Total Charge
1,710lbs
across 3 machine(s)
GWP-weighted CO₂e
1,336t CO₂e
full-charge equivalent if released
Lost (lifetime)
88lbs
all logged leak events
Action Required
1
phased-out refrigerant or threshold exceeded
Chiller fleet
Each card shows refrigerant inventory, GWP, leak rate vs EPA 608 threshold, and current alert state.
CHIL-1Watch
Trane · CenTraVac CVHE · Mechanical Room (B1) · install 2014
R-134aPhasing down
HFC-134a · GWP 1,430
Charge
850 lbs
Capacity
400 tons
CO₂e (charge)
551 t
Leak rate (1y)
0.0%/ 35% EPA
Last serviced: 2024-11-12
CHIL-2OK
York · YK Steam-Turbine · Mechanical Room (B1) · install 2017
R-410APhasing down
HFC-410A · GWP 2,088
Charge
620 lbs
Capacity
300 tons
CO₂e (charge)
587 t
Leak rate (1y)
0.0%/ 35% EPA
Last serviced: 2024-10-05
RTU-1 (Lobby)Action Required
Carrier · 48TC Rooftop · Roof · install 2008
R-22Phased out
HCFC-22 · GWP 1,810
Charge
240 lbs
Capacity
25 tons
CO₂e (charge)
197 t
Leak rate (1y)
0.0%/ 35% EPA
Last serviced: 2024-09-18
R-22 production banned 2020. Schedule retrofit to R-410A or R-32.
EPA 608 compliance ledger
Every logged leak event with cause, resolution, and certified technician sign-off. Required record-keeping under 40 CFR Part 82, Subpart F.
| Date | Equipment | Refrigerant | Lost (lbs) | Cause | Resolution | Sign-off |
|---|---|---|---|---|---|---|
| 2024-08-15 | CHIL-1 | R-134a | 42 | Pinhole on suction tube | Tube re-brazed, leak test passed. | EPA-608 Universal Tech (J. Reyes, Cert# 4421-A) |
| 2024-04-09 | RTU-1 (Lobby) | R-22 | 18 | Compressor weep | Topped off (R-22 reclaimed stock); retrofit scheduled. | EPA-608 Universal Tech (J. Reyes, Cert# 4421-A) |
| 2023-06-22 | CHIL-1 | R-134a | 28 | Worn shaft seal | Seal replaced. | EPA-608 Universal Tech (J. Reyes, Cert# 4421-A) |
Refrigerant reference
GWP and regulatory status of common refrigerants in commercial HVAC. Higher GWP = more CO₂e impact per pound released.
| Designation | Formula | GWP (100yr) | Status | Notes |
|---|---|---|---|---|
| R-22 | HCFC-22 | 1,810 | Phased out | Production banned 2020. Recovered/recycled stock only. Flag for retrofit. |
| R-134a | HFC-134a | 1,430 | Phasing down | AIM Act phase-down — retrofit to R-1234yf or R-513A planned by 2030. |
| R-410A | HFC-410A | 2,088 | Phasing down | Common in chillers and rooftop units. AIM Act phase-down to R-32/R-454B by 2025. |
| R-32 | HFC-32 | 675 | Current | Mildly flammable (A2L). Replaces R-410A in newer equipment. |
| R-1234yf | HFO-1234yf | 4 | Low-GWP | Ultra-low-GWP. Standard in new chiller installs. |