A2L safety

A2L refrigerants are mildly flammable, which is why the equipment around them changed. This is what that means in a house.

• A2L Leak Detection: What the Equipment Has to Do Why A2L systems carry refrigerant detection at all, what the detection actually triggers, and which of it your manufacturer has committed to in writing.
  Checked against sources 2026-09-01
• What A2L Actually Means in Your House Mildly flammable is a classification, not a warning label. What changed in the equipment because of it, and what a homeowner is actually being asked to accept.
  Checked against sources 2026-09-01

This is a starting point, not an approval. Everything here is read from published manufacturer documents and dated, but only the licensed contractor who signs your installation can approve a specific system for your home and your local code. Take the citations on this page to them and ask.