Reefer Trucking: Complete Guide to Temperature-Controlled Shipping

April 3, 2026 6 min read

Reefer Trucking: The Complete Guide to Temperature-Controlled Shipping

If your product can spoil, melt, freeze, or degrade at the wrong temperature, you need a reefer trailer. Reefer trucking (short for refrigerated trucking) keeps your cargo at a precise temperature from pickup to delivery. It’s more expensive than dry van shipping, more things can go wrong, and the stakes are higher — a rejected load of produce or pharmaceuticals isn’t just a freight claim, it’s lost product.

This guide covers how reefer trailers work, what commodities need them, what they cost, and how to avoid the problems that catch first-time reefer shippers off guard.

What Is Reefer Trucking?

A reefer trailer is an insulated 53′ trailer with a self-contained refrigeration unit mounted on the front wall. The unit runs on its own diesel engine (separate from the truck’s engine) and can maintain temperatures ranging from -20F to +70F. This makes reefer trailers capable of hauling frozen goods, chilled products, and even temperature-sensitive items that just need to stay above freezing.

How Reefer Trailers Work

Refrigeration unit: A diesel-powered compressor system (most common brands: Carrier, Thermo King) that cools or heats the trailer interior
Continuous vs. cycle mode: Continuous mode maintains a steady temperature (best for frozen goods). Cycle mode lets the temperature fluctuate within a range (common for produce and other fresh goods that need airflow).
Air chute system: Channels cold air from the unit along the ceiling and down the back wall, creating circulation. Proper loading leaves space for airflow — stacking freight against the walls or ceiling blocks circulation and causes hot spots.
Temperature monitoring: Modern reefers have electronic data loggers that record temperature throughout transit. Many shippers and receivers require a printout (pulp temp or reefer download) at delivery to verify the cold chain wasn’t broken.
Pre-cooling: The trailer is cooled to the target temperature before loading. This is critical — the reefer unit is designed to maintain temperature, not to cool warm product down.

Commodities That Need Reefer Shipping

Fresh Produce (32F–55F)

Fruits, vegetables, berries, herbs. Temperature requirements vary by item — lettuce ships at 32F, bananas at 56F, tomatoes at 55F. Produce also generates ethylene gas and heat, so airflow is critical.

Dairy and Eggs (33F–40F)

Milk, cheese, yogurt, butter, eggs. Must maintain a strict cold chain with no temperature excursions. Cross-contamination with strong-smelling freight is a concern.

Frozen Foods (-10F to 0F)

Ice cream, frozen meats, frozen vegetables, prepared meals. Must stay frozen solid throughout transit. Even brief temperature excursions cause quality loss (freezer burn, texture changes).

Meat and Seafood (28F–32F fresh, -10F to 0F frozen)

Requires strict temperature control and USDA compliance for certain products. Cross-contamination prevention is critical — most carriers won’t co-load meat with other commodities.

Pharmaceuticals and Biotech (36F–46F typical, varies widely)

Vaccines, biologics, clinical trial materials. The tightest temperature requirements of any commodity. Many pharma shipments require validated lanes, calibrated monitoring, and chain-of-custody documentation.

Chemicals and Specialty Products

Certain adhesives, resins, paints, and chemicals must stay above freezing or within a specific range to remain usable. Chocolate, candles, and cosmetics are also common reefer commodities in warm months.

Reefer Trucking Costs

Reefer rates run 15–30% higher than comparable dry van rates. Here’s why:

Equipment cost: Reefer trailers cost $70,000–$90,000 (vs. $30,000–$40,000 for dry van trailers)
Fuel for the reefer unit: The refrigeration unit burns 0.5–1.0 gallons of diesel per hour, adding $100–$300+ in fuel cost per load
Maintenance: Reefer units require specialized maintenance and more frequent service
Driver premium: Reefer loads often involve stricter delivery windows and more complex loading procedures

Typical Reefer Rates

Rate per mile: $2.50–$4.50/mile (vs. $1.80–$3.00 for dry van)
Short haul (under 250 miles): $600–$1,500
Regional (500 miles): $1,500–$2,500
Long haul (1,500+ miles): $4,000–$7,000+

Common Reefer Shipping Problems

Temperature Excursions

A temperature excursion happens when the trailer temperature goes outside the acceptable range. Causes include: reefer unit malfunction, doors opened too long during multi-stop delivery, improper pre-cooling, or product loaded warm. Receivers will reject loads that show excursions on the temperature log. Prevention: verify pre-cool temperature before loading, use a temperature recorder, and work with carriers who monitor reefer units via GPS/telematics.

Pre-Cooling Failures

The trailer must be pre-cooled to the target temperature before your product is loaded. If the driver arrives with a warm trailer and loads anyway, the reefer unit will struggle to bring the temperature down — and your product will be at risk. Always confirm the trailer temperature before loading begins. If it’s not within range, don’t load.

Lumper Fees

Many grocery and food distribution warehouses use third-party unloading crews (lumpers) instead of their own employees. Lumper fees range from $150–$400 per load and are usually the shipper’s responsibility. Some carriers will pay and bill you back; others require a comcheck on the spot. Ask your broker about lumper expectations at your delivery location before the truck ships.

Rejected Loads

Receivers of temperature-sensitive freight can (and will) reject loads for: temperature excursions, damaged product, late delivery past the appointment window, or pulp temperature readings outside spec. A rejected reefer load is expensive — you’re paying for the freight both ways, plus the product loss. Prevention starts with choosing the right carrier and verifying temperature before and during transit.

How to Choose a Reefer Carrier

Equipment condition: Older reefer units are more likely to break down. Ask about fleet age and maintenance schedules.
Temperature monitoring: Does the carrier offer real-time reefer temperature tracking? Can you see it, or do you have to ask?
Food safety compliance: Under FSMA (Food Safety Modernization Act), carriers hauling food must follow sanitary transportation rules — clean trailers, proper temperature documentation, no co-loading incompatible products.
Delivery reliability: Late deliveries on reefer freight often mean rejected loads. Check the carrier’s on-time record.
Washout documentation: For sensitive commodities, carriers must provide proof the trailer was washed between loads — especially after hauling meat, chemicals, or other strong-smelling products.

FSMA and Food Safety Compliance

The FDA’s Food Safety Modernization Act (FSMA) Sanitary Transportation Rule applies to anyone who transports food by motor vehicle. Key requirements:

Vehicles and equipment must be maintained in sanitary condition
Temperature controls must be maintained during transit
Carriers must have written procedures for cleaning vehicles between loads
Shippers must specify temperature requirements in writing
Records must be kept for 12 months

As the shipper, you’re responsible for specifying the correct temperature and confirming the carrier can maintain it. Your freight broker should document this on every load.

Get a Reefer Freight Quote

BlackBridge Logistics moves temperature-controlled freight across the U.S. — produce, frozen goods, dairy, pharmaceuticals, and specialty products. We work with vetted reefer carriers who maintain modern equipment, provide real-time temperature monitoring, and comply with FSMA requirements.

Request a reefer trucking quote or call us at (516) 252-3395. Tell us your commodity, temperature requirement, and lane — we’ll get you a rate and a carrier who won’t let your product down.