Carrier profile · USDOT 1037394 · Updated Jun 13, 2026
Herbert W Collins Inc
DBA ONE HOUR AIR CONDITIONING & HEATING
3 power unitsavg 3.8 yrLocal · 1 statesMOUNT AIRY, MD84/100
AUTHORITY STATUS UNKNOWN
Equipment
Haulable capacity (power units only — trailers are towed context), equipment mix, and the VIN-decoded unit roster. Click any VIN to trace that unit across every carrier that has run it.
Capacity· power units = haulable capacity; trailers are towed
- Registered power units (MCS-150)
- 3
- Observed power (24 mo)
- 4
- Trailers (towed)
- 0
Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.
Fleet age· model years · decoded VINs
Average age
2026
Newest model yr
2017
Oldest model yr
50.0%
VINs decoded
Unit roster· VIN-decoded from inspections · NHTSA vPIC
| VIN | Type | Year | Make | Model | Insp. | Last seen |
|---|---|---|---|---|---|---|
| JALCDW162N7014308View sourced platform decode | Incomplete - Chassis Cab (Single Cab) | 2022 | CHEVROLET | 4500HD | 3 | Mar 25, 2026 |
| 54DC4W1D2RS210215View sourced platform decode | Incomplete - Chassis Cab (Single Cab) | 2024 | ISUZU | NPR-HD | 2 | Feb 13, 2025 |
| 54DC4W1D5TS200169View sourced platform decode | Power unit | 2026 | ISUZU | — | 1 | Jun 16, 2026 |
| JALC4W16XH7000743View sourced platform decode | Power unit | 2017 | ISU | — | 1 | Feb 3, 2025 |
Showing 4 · most-inspected first.