Carrier profile · USDOT 3973619 · MC-1485630 · Updated Jun 13, 2026
CERTIFIED REFRIGERATION & MECHANICAL LLC
DBA COMFORT SYSTEMS|NORTHWEST REFRIGERATION SERVICES|METROPOLITAN FOOD SERVICE EQUIPMENT|DONS SHEET METAL
125 power unitsMADISON, WI50/100
NO OPERATING AUTHORITYMC-1485630 NO AUTHORITY
Network & Fraud
Reincarnation chains, shared-VIN links, common domains and officers, and owner-group affiliations — the chameleon / double-broker signals that name-and-USDOT lookups miss.
Shares a registration email domain with other carriers
@coolsys.com — 8 carriers: USDOT 482312USDOT 563378USDOT 741220USDOT 1267365USDOT 1270250USDOT 3766747USDOT 4011937
Owner / group view· confidence: email domain
Owner / group view
Affiliated authorities
Collapses 8 related authorities · joined by email domain
- Authorities
- 8
- Combined power
- 229
- States
- 6
- Oldest authority
- May 4, 1992
- Active now
- 3
- CERTIFIED REFRIGERATION & MECHANICAL LLC· viewingUSDOT 3973619125PU
- COOLSYS LIGHT COMMERCIAL SOLUTIONS LLCUSDOT 376674747PU
- RON'S REFRIGERATION AND AIR CONDITIONING LLCUSDOT 401193726PU
- COOLSYS COMMERCIAL & INDUSTRIAL SOLUTIONS INCUSDOT 126736516PU
- ABC REFRIGERATION & HVAC LLCUSDOT 5633787PU
- MECHANICAL ENGINEERING AND CONSTRUCTION CORPORATIONUSDOT 12702504PU
- TRIANGLE REFRIGERATION HVAC LLCUSDOT 4823123PU
- DUQUETTE HVAC LLCUSDOT 7412201PU