Meaningful progress requires action across refrigerant management, equipment efficiency, and operational practices simultaneously.
We are systematically transitioning our product lines from high-GWP HFC refrigerants (R-410A, GWP 2088) to lower-impact alternatives. Our heat pumps are now available with R-32 (GWP 675), R-454B (GWP 466), and R-290 (propane, GWP 3) depending on capacity range and local safety codes.
By 2028, we aim to have low-GWP options available across 85% of our product portfolio, ahead of Kigali Amendment phase-down deadlines for developed countries.
Our inverter-driven compressor platform reduces annual energy consumption by 30-50% at typical part-load conditions compared to fixed-speed equivalents. Every unit we ship exceeds ASHRAE 90.1 minimum efficiency standards by at least 15%.
Across our installed base of over 180,000 units worldwide, the cumulative annual energy savings represent an estimated 420,000 MWh reduction in electricity demand, calculated by comparing actual field-measured consumption of inverter units against the energy use of equivalent fixed-speed models at the same site load profiles (methodology per ASHRAE Guideline 14-2014 for measurement and verification).
We design for longevity: our heat exchangers use 316L stainless steel in corrosive environments, and our compressors are rated for 80,000+ operating hours. When equipment reaches end of life, our take-back program ensures proper refrigerant recovery and material recycling.
In 2025, we recovered 98.7% of refrigerant charge from decommissioned units through our certified recovery network.
Measurable commitments with annual public reporting.
Sustainability claims require honest boundaries. Here is where our current technology and infrastructure have limitations.
Our R-290 (propane) product line currently covers heat pumps up to 20 kW only, due to IEC 60335-2-40 charge limits for occupied spaces. Larger capacity applications above 50 kW still rely on R-32 or R-454B with GWP values of 675 and 466 respectively, not yet achieving the near-zero GWP of natural alternatives.
Currently, recycled aluminum and copper content in our heat exchangers averages 18-22%, limited by supply chain availability of certified recycled metals meeting ASTM B209 and ASTM B75 specifications. Our 2030 target of 40% recycled content depends on upstream recycling infrastructure development.
The global phase-down of high-GWP HFCs under the Kigali Amendment and EU F-Gas Regulation has created two distinct transition pathways. Both have technical merit, and the right choice depends on your facility, local codes, and long-term strategy.
CO2 (R-744), ammonia (R-717), and propane (R-290) offer zero or near-zero GWP with no patent dependencies and lower long-term operating costs. Transcritical CO2 systems are increasingly viable even in warmer climates, and ammonia remains the standard for large industrial installations above 500 kW.
Considerations: Higher upfront equipment cost, flammability (R-290) or toxicity (R-717) requiring enhanced safety systems per ISO 5149, and a smaller pool of qualified service technicians in some regions.
Next-generation HFO blends provide drop-in compatibility with existing HFC infrastructure, reducing retrofit costs and enabling faster adoption. R-454B (GWP 466) and R-1234ze (GWP 7) avoid the flammability and toxicity concerns of natural refrigerants while meeting near-term regulatory thresholds.
Considerations: Patent-protected molecules carry a price premium, long-term atmospheric decomposition products (TFA) face ongoing environmental scrutiny, and GWP values are higher than naturals, potentially requiring future transitions.
LennoxAir offers products in both pathways. Our engineering team evaluates each project individually, factoring in local refrigerant regulations, charge size limits, building occupancy classification, and total cost of ownership over a 15-20 year lifecycle.
Third-party verified certifications provide assurance that our sustainability claims are backed by auditable evidence.
Let our engineering team evaluate your current HVAC system and recommend a refrigerant transition pathway with verified energy and emissions projections.
Request a Sustainability Assessment