Every chiller, walk-in cooler, ice machine and rooftop unit that comes out of a building is holding refrigerant until someone takes it out. Federal law says that someone has to be certified, the refrigerant has to be recovered into cylinders instead of the air, and there has to be a record. Most people who hire demolition never see any of that happen. Here is what it looks like when it is done right, and how to tell when it is not.
Why it matters to the person paying the invoice
Section 608 of the Clean Air Act prohibits venting refrigerant during service or disposal of appliances, and it requires the person doing the recovery to hold an EPA certification. The penalties are real, and they do not stop at the technician. The building owner who hired an uncertified crew has a problem, and so does the general contractor who let them on site. For a property manager, “what happened to the refrigerant” is a question that can come up years after the equipment is gone, from an auditor, an insurer or a buyer.
The practical version: if nobody can show you a recovery record, assume it was vented, and understand whose name is on the building.
What we do before anyone opens a line
Identify every circuit. A walk-in has a condensing unit; a modular ice machine has its own; a chiller can have several. On a downtown kitchen job this summer we counted six circuits across three walk-in boxes and an ice machine before touching anything. Six circuits meant six recoveries.
Identify the refrigerant, and do not trust the neighbor. Nameplates say what the unit shipped with. Field retrofits change that. On that same job one unit was labeled R-22 by the equipment next to it but had been retrofitted to a blend, marked only by a sticker on the compressor shell. Recovering a blend into a cylinder of R-22 contaminates both. Every circuit gets identified on its own evidence: nameplate, service markings, and a static pressure reading cross-checked against the pressure-temperature relationship for that refrigerant.
Confirm there is actually a charge. A gauge that reads zero at the service port can mean an empty system or a packed service valve seated mid-travel. We have caught the second one. The circuit is not declared empty until the valve position is verified and the recovery unit has run with both ports open and put nothing on the scale.
Recover by type into dedicated cylinders. Each refrigerant type goes into its own DOT-specification cylinder. The recovery unit is self-purged and the hoses evacuated between types, with a dedicated filter drier for each. No commingling, ever. The cylinders are weighed before and after so the record shows pounds recovered, and every cylinder stays under its 80 percent net fill limit.
Evacuate to the required level and hold. For the high-pressure appliances we usually see, the required evacuation level is atmospheric. We pull every circuit to or below that level and hold it isolated to prove it is not creeping back up before anyone cuts.
Flag what cannot go back into service. A circuit with burnout indicators, a high-acid filter drier or a replacement compressor gets tagged reclaim-only. So does a retrofit blend recovered from a system with a suction-line drier. That tag follows the cylinder.
Write it down. Pounds by type, cylinder serial numbers, technician name and certification number, the recovery unit, the method, the hold test, and the receiving facility with its EPA reclaimer status. That document goes in the closeout package and the client keeps it. So do we, for at least three years.
In-house or a recovery partner
BCK has an EPA 608 Universal certified technician on staff, so recovery can be done in house and documented on our own forms. On larger jobs it sometimes makes more sense to bring in a certified recovery partner: they recover while we work elsewhere on site, and on big charges the reclaimed refrigerant can have enough value that they credit some of it back. That is a scheduling and cost decision, and the client gets the same record either way. What never changes is that the refrigerant is recovered, weighed and accounted for before a torch is lit.
What to ask any demolition contractor
Three questions, before the first cut:
- Who on your crew holds the 608 certification, and what type?
- What record will I get, and will it show pounds by type and where the cylinders went?
- If the unit was retrofitted, how will you know?
A contractor who does this every week has quick answers. A contractor who does not will change the subject.
