Thailand bans R-22 imports in 2030 — old chillers face 1 of 3 choices: (1) full system swap to R-454B (best, 15+ year life) (2) drop-in R-417a (fastest, but EER drops 8-15%) (3) keep running on reclaimed R-22 (new rules require licensed reclaimers) — start planning before Q4-2027.
Thailand is scheduled to phase out R-22 (HCFC-22) under its Kigali Amendment commitments by 2030 — no new R-22 imports, no use in new equipment, and existing systems limited to reclaimed refrigerant (recovered from decommissioned systems) only. Factories still running R-22 chillers — Carrier 30HXC, Trane RTHB, York YCAS, Daikin McQuay units from the 1990s to early 2000s — need to plan their conversion by Q4-2027 so it lands in the next budget cycle and ahead of the technician shortage.
This article is a practical playbook for Facility / Engineering / Procurement teams who have to decide:
- Which R-22 systems are worth converting vs. which to scrap
- Which replacement refrigerant to choose — R-32 / R-454B / R-417a / R-407c
- Real costs + timeline + risk
- The A2L safety provisions you need to prepare for
Thailand Phase-out Timeline — the real numbers
| Year | R-22 status in Thailand |
|---|---|
| 2013-2024 | Import quota restricted (cut 10-15% per year per the DIW plan) |
| 2025-2026 | Quota down to ~25% of 2013 — R-22 spot price up 40-60% |
| 2027-2029 | Quota down to ~10% — emphasis on reclaim from decommissioned systems |
| 2030 onwards | No new R-22 imports; only reclaimed material through a licensed reclaimer (DIW วอ.) is permitted |
Note: R-22 still inside a system at 2030 may continue in service — but top-ups + repairs must use reclaimed refrigerant only. Reclaimed price is projected at ≥ ฿15,000/kg by 2030 (vs ฿2,800-3,500/kg in 2026).
Retrofit candidate comparison for R-22 chillers
| Replacement | ASHRAE Safety | GWP | Glide | EER vs R-22 | Compressor swap? | Oil change | Cost per ton-R | Best for |
|---|---|---|---|---|---|---|---|---|
| R-32 | A2L (mildly flammable) | 675 | 0°C | +5% to +8% | New required (A2L compressor + control) | New POE | ฿8,000-12,000 | New equipment only — not a retrofit |
| R-454B (HFO blend) | A2L | 466 | <1°C | -2% to +3% | New required (A2L compressor) | New POE | ฿9,000-14,000 | New chiller + capital upgrade |
| R-417a | A1 | 2,346 | 4°C | -8% to -15% | Reuse existing | Mineral → POE | ฿3,500-5,500 | Quick drop-in retrofit — old systems with <5 years left |
| R-407c | A1 | 1,774 | 7°C | -3% to -8% | TXV swap required (high glide) | Mineral → POE | ฿5,500-7,500 | Mid-tier retrofit — average systems |
| R-422a / R-422d | A1 | 3,143 / 2,729 | 5°C | -5% to -10% | Reuse existing | Mineral OK | ฿4,500-6,500 | Drop-in for supermarket / cold storage |
GWP warning: R-417a + the R-422 series carry high GWP (>2,000) → may need replacing again by 2035 (the Kigali HFC phase-down step) — use only to extend the life of a chiller you plan to decommission within 5-8 years.
3-option decision tree
Option 1 — Full system replacement (new R-454B / R-32)
Choose if: chiller is <8 years old + system still sound + a 15-25 year investment horizon = R-22 → R-454B with new compressor + new EXV + new POE oil. Same or higher cooling capacity.
- Cost: ฿35,000-55,000 per ton-refrigeration (TR) for a 100-500 TR chiller
- Timeline: design + spec + install, 3-5 months
- EER gain: +5-15% (depending on heat exchanger refurb)
- New service life: 15-20 years
- Standard: ASHRAE 15 A2L compliance — machine-room ventilation + leak detector per EN 378
Option 2 — Drop-in retrofit (R-417a)
Choose if: chiller is 10-15 years old + budget is tight + you need 3-5 more years of life
- Cost: ฿8,000-15,000 per TR (refrigerant + flush + POE oil + filter drier)
- Timeline: 1-2 weeks (including recovery + recharge)
- EER loss: -8% to -15% → higher power bill
- New service life: 3-7 years
- Standard: ASHRAE 34 A1 — no change to the safety system
Option 3 — Continue on reclaimed R-22
Choose if: chiller has <5 years left + the system has no leak
- Cost: ฿0 capex — but top-ups require reclaimed R-22 from a DIW-licensed reclaimer
- 2026 price: ฿3,500-5,000/kg
- 2030 price: ฿15,000+/kg (projected)
- Risk: a major leak in 2028+ → there may be no R-22 to buy → chiller down → emergency replacement at 1.5x the cost
A2L safety — what R-22 never required
R-32 and R-454B are classified A2L (mildly flammable) under ASHRAE 34 — low flammability, but they require extra provisions:
- Machine-room ventilation: flow rate ≥ 0.0875 × √(M) cfm per kg of refrigerant charge (ASHRAE 15-2022 §7.4.2)
- Refrigerant leak detector per EN 378: temperature + concentration sensors — alarm setpoint at 25% LFL
- Electrical equipment in the machine room: ATEX Zone 2 or NEC Class I Div 2 where concentration risk exists
- Charge limit: R-32 max 1.84 kg per occupied space (IEC 60335-2-40)
- Refrigerant tech PPE: face shield + flame-resistant gloves + EN 1149 antistatic clothing
Extra cost: upgrading a machine room to A2L = ฿150,000-450,000 per chiller room depending on size.
Selection guide by chiller type
| Chiller Type | OEM-recommended R-22 replacement | Note |
|---|---|---|
| Air-cooled screw chiller (Carrier 30HXC / Trane RTHB) | R-454B (new) or R-417a (drop-in) | New = best EER; drop-in = life extension |
| Water-cooled centrifugal (Trane CenTraVac / York YT) | R-513A (old R-134a → low-GWP) | R-22 centrifugals are rare — usually R-134a/R-123 |
| Reciprocating chiller (Carrier 30RH / York YCAS) | R-407c or R-422a | Old technology — often scrapped instead |
| Rooftop unit (RTU) — light commercial | R-32 (new unit) | DX coil — full unit replacement |
Related services
SAHA supplies and advises on:
- Replacement refrigerants: R-454B, R-417a, R-407c, R-422a — AHRI 700:2019 certified every lot
- POE compressor oil: Emkarate™ RL series — viscosity per the chiller OEM spec
- Refrigerant recovery service: recovery machine + cylinders + full DIW (วอ.) license
- A2L safety upgrade consult: ventilation + leak detector + ATEX equipment supply
- Bulk refrigerant cylinders: 11.3 kg disposable, 48 kg refillable, 750 kg bulk container
Summary for procurement + facility managers
Recommended sequence:
- Q3-Q4 2026: Audit all R-22 chillers — record age / capacity / leak history / R-22 charge
- Q1 2027: Rank chillers against the decision tree (replace / retrofit / continue)
- Q2-Q3 2027: Spec + tender — issue a TOR that requires ASHRAE 15 A2L compliance for replacements
- Q4 2027 - Q4 2028: Install the first batch (high-priority chillers)
- 2029: Close out R-22 cylinder inventory — switch to reclaimed stock
- 2030: Remaining R-22 machines → planned decommissioning
Don't wait until Q1 2030 to start — Thailand has a severe shortage of R-454B installers and A2L-trained techs, and installation prices will spike after 2028.
This article summarizes the regulatory framework and technical options — it is not model-specific advice. For converting a particular chiller model, contact the Sahawatthanakit (1988) engineering team for a site survey + system selection report with ROI calculation.
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