How to Upfit Your Enclosed Service Truck With an All-in-One | MillerWelds

How to Upfit Your Enclosed Service Truck With an All-in-One

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All-in-one systems can offer many benefits in enclosed trucks, but proper installation is key. Get four tips to help.
Blue and white graphic illustration of an enclosed body truck

Upfitting an enclosed truck

Enclosed service bodies are the go-to truck type in many industries, from utility companies and over-the-road service to HVAC, plumbing and electrical work. Available in a wide variety of sizes and styles, enclosed trucks often feature side-access storage and a secure cargo area for tools and equipment.

Load space is typically at a premium. Choose the right equipment during upfitting to best enhance efficiency and productivity.

All-in-one power systems can be used in some enclosed trucks and offer numerous benefits in these applications. However, proper installation is critical to ensure the proper cooling air is provided and hot air is routed outside the truck. An improperly installed all-in-one can restrict airflow, provide poor performance and cause the unit to overheat.

Learn more about the advantages of all-in-one solutions and get four tips for proper installation in enclosed body trucks.

Benefits of an all-in-one

Integrated all-in-one solutions deliver benefits that can improve operator efficiency and comfort. These include:

  • Space savings: When one unit provides all the necessary capabilities to tackle a range of jobs in the field, it eliminates the need to carry multiple pieces of equipment. A Miller® EnPak® all-in-one provides compressed air, generator power, battery charge/crank assist and welding in a small footprint.
  • Noise reduction: Auto Start/Stop automatically turns the EnPak engine on and off based on demand. This reduces fuel consumption and noise — which enhances safety and improves the work environment. In addition, Auto-Speed™ technology automatically adjusts engine speed to match compressed air, battery charge and weld demands — reducing noise for a safer, more efficient work environment.
  • Access and convenience: Remote auxiliary panels available with EnPak solutions provide versatility in where the machine is located versus where the controls are for the user. This helps optimize the available space in a truck. For example, the technician can add outlets where their worktable is located. Properly located remote panels also enhance safety, since the technician doesn’t have to move around as much or move their equipment to use it.

It’s important to think through the design and layout of an enclosed truck to optimize all-in-one performance and safety. Every install is different but keeping best practices in mind when installing an all-in-one solution on an enclosed truck will help greatly.

Here are four tips for installation in an enclosed truck:

Tip 1: Don’t bury the unit  

Graphic illustration of the back of an enclosed service truck with an all-in-one power system

Using an all-in-one inside an enclosed truck requires proper ventilation around the unit to ensure airflow of cold air in and hot air out. If the all-in-one system doesn’t have enough airflow, the machine can overheat. This negatively impacts performance and machine life. An under-deck installation is an option worth considering on some chassis.

Tip 2: Duct directly to the outside

Graphic illustration showing an all-in-one power system installed in an enclosed truck

Think of the enclosed truck body as a closed system. Engines and other components produce heat, so proper cooling requires adequate air circulation. Fresh, cool air must be brought in, and hot air must be removed. The best way to prevent recirculation of the hot air created by an all-in-one is to either duct the hot air directly to the outside or duct cool air into the air intakes.

In addition, engine exhaust fumes contain carbon monoxide, so they must be ducted to the outside. Never use an EnPak all-in-one inside a home or garage, even if doors and windows are open. Always read and follow all labels and the Owner’s Manual carefully.

Avoid using exhaust pipe extensions or extra elbows to duct the exhaust fumes. This will cause back pressure in the engine exhaust and reduce flow through the combustion chamber. This compromises engine performance and can cause exhaust emissions issues.

Ideally there would be no exhaust pipe extensions. Keep extensions to a minimum when they must be used. Any extensions require the use of larger-diameter tubing — at least one and a half times the diameter of the stock exhaust pipe.

Routing exhaust through the floor of the truck is discouraged. It requires at least two additional bends and several feet of exhaust pipe — resulting in excessive exhaust back pressure. Instead, route exhaust through the closest sidewall or straight up through the roof for units mounted on a stand.

Tip 3: Ensure access for service

Graphic illustration of a technician servicing an EnPak all-in-one system

There needs to be enough clearance on all sides of the all-in-one unit to ensure accessibility for routine service and troubleshooting, which may require access to multiple sides of the unit.

Space in enclosed trucks is at a premium. It’s not uncommon for a custom enclosure to be built around the all-in-one unit. These enclosures must accommodate the required ventilation and be removable so the unit can be accessed for service.

The recommended amount of space on each side of the unit varies by model. Find this information in the unit’s owner’s manual.

Tip 4: Choose a machine with lower noise levels

Graphic illustration of a technician working in the back of a truck next to an EnPak power system

When equipment is running inside an enclosed truck body, noise can be a big issue affecting technician comfort and hampering productivity.

Look for an all-in-one unit that delivers quiet operation. A combination of industry-leading technologies on Miller EnPak all-in-one solutions help reduce noise:

  • Auto Start/Stop automatically turns the EnPak engine on and off based on demand, so it’s not constantly running.
  • Auto-Speed technology automatically adjusts engine speed to match demand — reducing noise.
  • Chassis Power, which is integrated into the chassis battery, monitors voltage and automatically charges it as needed. This allows technicians to turn off their truck to reduce jobsite noise.

Upfitting an enclosed truck

Following these best practices can help optimize performance and safety when using an all-in-one solution in an enclosed work truck — so you can reap the numerous benefits the systems offer. It’s also a good idea to partner with an experienced upfitter who can help ensure proper installation of your all-in-one in an enclosed truck. To find a local EnPak service location and upfitter near you, visit the service location guide.