The Refrigerant Phase-Out Is a 20-Year Cost Trap Hiding in HVAC RFQs

AHRI-certified chillers are migrating off R-410A onto A2L refrigerants, 50,197 of 52,000 certified models now run R-454B. For Thailand and Southeast Asia buyers spec-ing on legacy refrigerants, the phase-out compounds with aluminum CBAM into a stacked, EU-bound cost few RFQs price today.

The HVAC and chiller market is in the middle of a refrigerant generation change, and the AHRI Directory of Certified Product Performance is the cleanest place to read it. Across 52,000 AHRI-certified products from 80 distinct manufacturers, 50,197 models are now certified on R-454B and 1,653 on R-32, both A2L, mildly flammable, post-2025 refrigerants, against just 150 models still on legacy R-410A. AHRI certification is the mandatory performance attestation for HVAC equipment sold in North America, so the directory is effectively the canonical supplier universe, and it has already crossed over to the new refrigerant cohort.

A second, structured drop confirms the same migration at the OEM level. A crawl of 47 verified product models across the four major OEMs, Carrier, Trane, Daikin, and Mitsubishi, found 26 models on R-32 and 21 on R-454B, and zero on R-410A. This is the post-phase-out cohort that defines what new procurement actually looks like: the legacy refrigerant is no longer something a tier-1 OEM ships into the current-model channel.

A Japanese-led supply base, and a Thailand corridor question

HVAC sits inside a roughly 60% Japanese-led concentration in our cross-vertical mapping, and the OEM data shows why that matters for sourcing. Among the four majors, Mitsubishi posts the highest average SEER2 at 25.3 with 12 of 13 models cold-climate qualified, while Carrier, Trane, and Daikin cluster around SEER2 18.9 to 20.4. Carrier's own R-32 scroll compressors trace to a Toshiba-Carrier JV, a reminder that the compressor, the highest-cost component, often carries Japanese supply-chain DNA even under a US brand. For Southeast Asia buyers, the practical takeaway is that the modern-refrigerant supply base skews toward Japanese and Japanese-JV sourcing, which is also the lower-grid-carbon corridor that matters for what comes next.

The phase-out compounds with aluminum CBAM

The refrigerant change rarely arrives alone. The EU F-gas Regulation phases R-410A out by 2027, which forces a replacement chiller, and replacement chillers carry aluminum heat exchangers at roughly 30 to 50 kg of aluminum per ton of cooling. Aluminum is the single largest CBAM exposure across the verticals we have ingested, with 248 aluminum mentions and 170 of them in HVAC alone. If that replacement chiller ships from China into the EU, the stacked math lands hard.

The levy estimate stacks three layers: ~16 kg CO2 per kg of aluminum, ~40 kg of aluminum per ton of chiller, and an EU ETS price around USD 85 per tonne of CO2. That is a forced F-gas replacement (capex) plus an aluminum-content carbon levy on top, two obligations that single-regulation thinking quotes out one at a time and misses in combination. For EU-bound HVAC, the Thailand corridor is a measurable hedge: TH grid carbon runs ~430 g CO2/kWh against CN ~520 and IN ~700, so aluminum-heavy procurement routed through TH, JP, KR, or DE cuts both the direct levy framing and the 2027 indirect-emissions exposure.

“A buyer pricing chillers today against legacy refrigerants is signing a 20-year cost trap.”

· MPBxChange cross-vertical intelligence

RFQs are silent on the specs that decide the cost

The gap is not knowledge, it is the RFQ. A 94-PDF vendor spec corpus shows refrigerant appears in only 21% of sheets, AHRI certification in 17%, SEER in 15%, frequency in 35%, and voltage in 11%, and several of these are absent from our own chiller-focused reference schema. The standards exist to pin this down, AHRI 550/590 for chillers, AHRI 210/240 for residential, ASHRAE 90.1 and 15, ASHRAE 34 for refrigerant safety classes, plus Eurovent for EU-market equivalence, but if the RFQ never captures the refrigerant, the AHRI cert number, the electrical envelope, or the production country, none of those standards get enforced at the moment of purchase. A model AHRI-certified for USA and Canada only still needs a Eurovent or equivalent rating for an EU- or Asia-bound shipment, and frequency alone splits Thailand's 50 Hz from the US 60 Hz on different motors.

What it means for procurement

• Spec the refrigerant explicitly. With 50,197 of 52,000 AHRI-certified models on R-454B and tier-1 OEMs shipping zero R-410A, a legacy-refrigerant spec is a 2027 forced-replacement risk, not a savings.
• Capture the AHRI cert number in the RFQ so the bound model can be verified against the directory, and confirm a Eurovent or destination-equivalent rating for EU- or Asia-bound shipments certified only for USA/Canada.
• Price the F-gas phase-out and aluminum CBAM as one stacked obligation: ~USD 54 per ton of capacity for CN-to-EU, ~USD 27,000 on a 500-ton plant, on top of the forced replacement capex.
• Use the Thailand corridor as a CBAM hedge, TH ~430 g CO2/kWh vs CN ~520, and favor TH/JP/KR/DE sourcing for aluminum-heavy, EU-bound chillers.
• Pin the electrical envelope (voltage, phase, 50 vs 60 Hz) and the compressor OEM in writing; the compressor is the highest-cost component and frequency mismatch means the wrong motor.