BossJet Vertical Hot Box 99115V

BossJet Vertical Hot Box 99115V

12VDC, 8-10 GPM Diesel Hot Box

Turn Cold Water Pressure Washers into Hot Water Beasts. The BossJet 99115V Vertical Electric-Ignition Diesel-Fired Hot Box is built for professionals who need serious hot water performance without investing in a full hot water pressure washer. Designed to connect directly to an existing cold water pressure washer, the 99115V instantly upgrades your system with industrial-grade heat for faster, more effective cleaning.

Product Details:

Model: 99115V Compatible Flow Rate: 8.0–10.0 GPM

Power Supply: 115VAC

Amperage: 15A Cord / Plug: 35' GFCI

Burner: SM diesel burner with electronic ignitor

BTU Output: 420,000

Maximum Water Temperature: 93°C / 200°F

Heating Coil: 260' x 1/2" Schedule 80 cold-rolled steel

Fuel Tank Capacity: 26.5 L / 7 gal black poly

Adjustable Thermostat: No

Flow Switch: Yes

High Limit Switch: Yes

Rupture Disk: Yes

Inline Fuel Filter: Yes

Burner Switch: Toggle

Warranty Coverage, Burner: 3 Years Warranty

Coverage, Heating Coil: Lifetime

Price $5,499.00

Free Freight - 48 States
If you're delivering to a Residential address with no forklift and or dock, $79.00 liftgate service (2nd button below) is required for delivery.

Delivery Liftgate Service
Price $79.00

BossJet 12VDC, 8-10 GPM Diesel Fired Hot Box

12V Models Dimensions Shipping Weight GPM Price

# 99115V 34" × 25" × 54" 545 lbs 8.0 – 10.0 $5,499.00

Engineered for high-flow applications, this hot box supports 8.0–10.0 GPM, making it ideal for large-volume washing where heat and water flow work together to break down grease, oil, and heavy buildup. Powered by 115VAC and delivering 420,000 BTU, the 99115V heats water up to 93°C / 200°F, dramatically improving cleaning efficiency while reducing detergent usage.

Built into a rugged powder-coated steel frame, this vertical hot box is designed to withstand demanding job sites while providing reliable, on-demand hot water whenever the job calls for it.

The powder-coated steel frame provides durability, corrosion resistance, and stability in demanding work environments. The vertical configuration keeps the footprint compact while allowing easy access for service and maintenance.

All BossJet hot boxes are tested prior to shipping. Units may show signs of testing or residual fuel odor, confirming proper function and quality control.

For professionals running high-GPM pressure washers who need the cutting power of hot water, the 99115V Hot Box delivers industrial heat, rugged durability, and reliable performance on demand.

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