Frame rail · standard model
APU assembly
The drawing shows a 29.28 in (743.7 mm) overall span in the illustrated front view. Allow for the mounting arrangement, exhaust and service access.
TriPac installation planning
Know what fits.
Plan with confidence.
Explore where the components go, see Thermo King’s drawings, and start a better conversation about your truck.
← Back to TriPac sales
Diesel auxiliary power
TriPac 3
component dimensions.
Start with the frame-mounted APU and follow the system into the sleeper. Select a drawing to enlarge it.
Where it goes
A system built around the truck.
The APU typically sits on the passenger-side frame rail, the condenser on the rear of the cab, and the evaporator/MAC under the bunk. The heater and controller need their own locations.
The aftertreatment configuration and truck layout affect the space required.
View the TriPac 3 dimensions PDFEnlarge component locations ↗
Frame rail · ATD model
APU with aftertreatment
The ATD changes the package around the power unit. The shown front-view overall span is 29.28 in (743.7 mm); use the drawing and truck-specific clearances when planning.
Rear exterior of cab
A/C condenser
The drawing shows a 22.20 in (563.9 mm) horizontal span and 14.85 in (377.2 mm) mounting-tab height. The fan also needs its specified airflow keep-out area.
Typically under the bunk
Evaporator / MAC
The installed-bracket drawing shows a 21.64 in (550 mm) span. Check the other views for the installed height, fittings and space for ducting.
Sleeper storage / tool compartment
Cab heaters
Standard heater: 12.01 × 4.53 × 4.80 in (305 × 115 × 122 mm). High-output option: 14.80 × 5.51 × 5.91 in (376 × 140 × 150 mm).
Sleeper wall
In-cab controller
The TriPac 3 HMI drawing shows a 6.9 in (175 mm) face width. Leave room for the mounting plate, wiring and driver access.
Available electrical option
2,000-watt inverter
For Thermo King inverter model 452855, the operator’s manual lists 16.378 × 9.055 × 4.43 in (L × W × H). Confirm the inverter model and required ventilation for your installation.
Battery-electric auxiliary power
Envidia 2
component dimensions.
Make room for the battery box, cab components and any selected charging or power accessories.
Where it goes
See the system together.
The battery box mounts on the truck, with the condenser behind the cab and the evaporator/control box typically under the bunk. The available heater, shore-power equipment and inverter require additional planning.
View the Envidia 2 dimensions PDF
Enlarge component locations ↗Truck frame
Battery box
Front-view width is 20.32 in (516.12 mm), height is 27.10 in (688.34 mm), and the top-view depth is 18.17 in (461.51 mm) without the spacer or 18.67 in (474.21 mm) with it.
Rear exterior of cab
A/C condenser
The condenser drawing shows a 22.25 in (565.15 mm) face span and a 16.10 in (408.94 mm) overall height including mounting tabs. The drier and fittings extend beyond the face.
Typically under the bunk
Evaporator / control box
The illustrated side view is 21.4 in (544 mm) long and 11.6 in (295 mm) high. Review the top view for projections, connections and additional space.
Sleeper wall
In-cab controller
The face shown is 8.00 in (203 mm) wide. The drawing also shows the rear mounting and connector projection.
Sleeper storage / tool compartment
Available heaters
Standard heater: 12.25 × 4.50 × 4.80 in. High-output heater: 14.80 × 5.51 × 5.90 in. These are fuel-fired options for the electric APU.
Available charging option
Shore-power converter
The drawing shows 13.1 × 8.2 × 3.42 in (332.7 × 208.3 × 86.9 mm), including the illustrated mounting span. Leave space for cables and ventilation.
Available electrical option
1,000-watt inverter
The drawing shows a 13.3 × 8.1 × 3.5 in body (337.8 × 205.7 × 89 mm); the front mounting width shown is 8.7 in (221 mm). Check cable and cooling space.
Before you choose a location
Make the space
work for your truck.
These are planning dimensions. Actual mounting, service access and clearances depend on the truck, configuration and components selected.
Frame rail
Measure available space around the fuel tank, fairings, steps and other equipment. Identify the mounting side and possible obstructions.
Back of cab
Look for space for the condenser, its fittings and unobstructed airflow. Account for other equipment already mounted behind the cab.
Under the bunk
Check the space for the evaporator, heater and any power equipment, including space for ducting, wiring and service access.
Options & routing
Consider an ATD, inverter, shore power, exhaust, hoses and brackets. Your installer will confirm the final layout and required clearances.
Keep the details handy
Dimensions PDFs,
ready to read.
Open either manufacturer excerpt below, or download a copy to share with your sales representative.
Component dimensions
Choose the correct system for your truck.
Choose a document
Read the document without leaving this page.
Product literature, right here.Select a document to begin.
Select a document to begin.
We’re here to help
Let’s find the
right fit.
Bring your measurements and truck details to our team. We’ll help you work through the equipment and installation options.