U.S. Patent Issued 2025 · Class 8 Trucks

Comfort
That Pays For Itself

Reduce idling costs — without sacrificing climate control.
HydraulACool's breakthrough APU powers your truck's factory-installed HVAC using a hydraulic drive system. No bolt-on HVAC. Just pure, efficient comfort.

65–70%
Fuel Reduction
$6K+
Saved Per Truck / Year
20K
BTU OEM HVAC
⚙️
Hydraulic OEM Integration
Activates the truck's factory A/C compressor directly via hydraulic drive — no aftermarket bolt-on HVAC unit required.
🔥
~16–18 HP Tier 4 Diesel Engine
Small, efficient power plant runs at high efficiency. Only ~0.35–0.4 gal/hour vs. 1.0 gal/hr at idle.
🏠
Full Hotel Load Support
Fridge, microwave, TV, outlets — everything a driver needs for rest.
🚛
Day Cab & Sleeper Compatible
First true idle-reduction solution for the entire Class 8 market.

Idling Is Burning Your Money

Truck drivers idle for hours to stay cool — burning roughly a gallon of diesel per hour. Traditional aftermarket APUs (8,000–13,000 BTU) frequently underperform and frustrate drivers. With stricter EPA GHG Phase 2 and 3 rules now in effect, the industry urgently needs a better solution.

1.0gph
Diesel burned per hour at idle
$6K+
Annual cost per truck in fuel & maintenance
13KBTU
Max from traditional aftermarket APUs — often inadequate
EPA
GHG Phase 2 & 3 rules demand better idle-reduction now
Our Solution

Patented Breakthrough Technology

An integrated APU designed to deliver unmatched efficiency, driver comfort, and regulatory compliance across the entire Class 8 market.

🔩
Hydraulic Drive System
Directly activates the OEM A/C compressor via belt drive. No bolt-on HVAC — smooth, factory-level integration with a clean install.
❄️
15,000–20,000 BTU OEM HVAC
Powers the truck's factory-installed HVAC system. Full sleeper cab cooling performance even at 90–100°F ambient temperatures.
↑ 50% more cooling vs. traditional APUs
65–70% Fuel Savings
Uses only ~0.35–0.4 gallons/hour instead of the 1.0 gph of main engine idling. Savings of $5,000–$7,000 per truck annually.
$5K–$7K saved annually per truck
🏨
Full Hotel Load
Supports fridge, microwave, TV, and all outlets. Hydraulic tank + dual electric fans maintain system cooling even when the truck is off.
🚛
Day Cab & Sleeper
The first true idle-reduction solution for the full Class 8 market — not just sleeper trucks. ~450 lb system matches leading diesel APU weight profiles.
🛡️
Reduces Maintenance Issues
Minimizing idle time reduces DPF clogging, oil degradation, and unplanned downtime — lowering total operating costs beyond just fuel savings.

Fuel Use Comparison

HydraulACool uses a fraction of the fuel compared to main engine idling — delivering the same or better driver comfort.

Main Engine Idling
Engine Idle
1.0 gal/hr
Traditional APU (8–13K BTU)
Trad. APU
~0.6–0.8 gal/hr
HydraulACool APU ✓
HydraulACool
0.35–0.4 gal/hr

Based on approx. 1,800 idle hours/year per truck

Technical Highlights

Built for the Real World

⚖️
System Weight
≈ 450 lbs — matches leading diesel APUs
📐
Package Size (Engine/Hydraulic Unit)
19″ × 23″ × 24″
🌡️
Cooling Capability
Full sleeper cab performance at 90–100°F
Engine
Small Tier 4 Diesel, ~16–18 HP class
💧
Cooling System
Hydraulic Tank + Dual Electric Fans
🔗
Drive Integration
Clean Belt Drive — OEM-level fit
❄️
HVAC Output
15,000–20,000 BTU (factory OEM system)
📋
Patent Status
U.S. Patent Notice of Allowance — 2025

Built for Compliance

HydraulACool is engineered to help fleets stay ahead of tightening EPA regulations — not just meet them, but earn credits that benefit your entire fleet's GHG profile.



Talk to Our Team
EPA GHG Phase 2 Compliant
Meets current idle-reduction regulatory standards
EPA GHG Phase 3 Ready
Positioned for upcoming stricter emissions rules
EPA Off-Cycle Credits
Eligible under 40 CFR §1037.610 — improves fleet GHG scores
U.S. Patented Technology
Notice of Allowance issued 2025 — proprietary hydraulic APU design
Idle-Reduction Regulation Compliant
Helps fleets avoid anti-idling penalties nationwide
Get Started

Ready to Stop Burning Money?

Contact us to learn how HydraulACool can transform your fleet's idle-reduction strategy — and start saving $5,000–$7,000 per truck each year.

Email Us Today Visit HydraulACool.com