Custom Underdash A/C & Heating Units

Compact Design. Maximum Output. Vintage & Commercial Solutions.

Factory-Grade Climate Control, Right Under the Dash

When a vehicle didn't come with factory air conditioning—or the original system is long gone—cutting up the firewall or dashboard to retro-fit a bulky HVAC unit isn't always an option. Whether you are restoring a classic car, upgrading a delivery fleet, or outfitting heavy-duty agricultural equipment, our Underdash Units deliver high-velocity cooling and heating without altering your vehicle's original structural design.

Our systems are low-profile, and engineered to bolt directly beneath the dashboard. Simply connect our unit to your electrical system, hoses and a compressor (separately available, not included) to have a fully functional A/C system. Unbox, mount, connect your lines, and instantly transform your cabin into a climate-controlled sanctuary.

Engineered for Tight Spaces and Extreme Heat

Don't let the compact footprint fool you. These underdash systems are packed with high-efficiency internal components designed to drop cabin temperatures quickly, even in uninsulated vehicle cabs.

High-Output Evaporator Cores: Features multi-pass, aluminum dimpled tubing and high-density fin architecture for maximum heat exchange in a minimal space.
Multi-Speed Heavy Duty Blowers: Balanced dual-wheel centrifugal blowers provide quiet, high-volume airflow directly into the cabin.
Rugged ABS Injection-Molded Housings: Built from high-impact, UV-stabilized polymers that won't crack, rattle, or fade under heavy daily use.
Universal Mounting Flexibility: Heavy-gauge steel slotted brackets allow for adjustable mounting depths and angles to clear shifters, transmission tunnels, and steering columns.
Intuitive Integrated Controls: High-quality mechanical rotary switches put 3-speed fan control and an adjustable thermostat directly at your fingertips.

Configuration Guide: Choose Your Cabin Comfort

System Type	Best For	Core Component Layout	Airflow Configuration
Cool Only (A/C)	Vintage restorations, hot rods, and warm-climate utility vehicles.	High-efficiency Evaporator Core & Expansion Valve.	4 Adjustable Louvers (Directional Face-Level Flow)
Heat & Cool (Combo)	All-weather commercial fleets, delivery vans, and construction cabs.	Dual-Core Design: Dedicated Evaporator & Copper Heater Core.	Multi-Zone Louvers (Face-Level + Floor Defrost Options)

Built to Handle the Vibration of the Road

Commercial cabs and vintage builds present harsh environments filled with vibration and temperature spikes. We build our underdash units to handle the abuse without developing annoying rattles or dangerous refrigerant leaks.

Zero-Leak O-Ring Fittings: Uses standard, heavy-duty male insert O-ring fittings (#6 liquid line and #10 suction line) to ensure a bulletproof connection to your engine bay lines.

Deep-Dish Condensate Trays: Integrated high-capacity drain pans with dual outlets prevent condensation overflow during hard cornering or steep inclines.

Acoustically Isolated Motors: Blower assemblies are isolated on rubber grommets to eliminate low-frequency humming through the dashboard chassis.