Carrier profile · USDOT 3973619 · MC-1485630 · Updated Aug 16, 2026

Certified Refrigeration & Mechanical LLC

DBA COMFORT SYSTEMSNORTHWEST REFRIGERATION SERVICESMETROPOLITAN FOOD SERVICE EQUIPMENTDONS SHEET METAL

125 power unitsMADISON, WI50/100
NO OPERATING AUTHORITYMC-1485630 NO AUTHORITY
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Operations & Lanes

Where this carrier actually runs, revealed by roadside-inspection geography over the last 24 months — not where they claim to operate, shown as state-level inspection density.

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base
MADISON, WI
5817 FEMRITE DR
Density
fewermore
Shade = roadside inspections, last 24 mo.