Under dash heater kits are essential for drivers who want efficient heating and cooling options inside their vehicles, especially for classic cars, trucks, and RVs without factory-installed systems. This article reviews the best universal under dash heater kits that offer powerful airflow, adjustable temperature controls, and easy installation. Below is a summary table featuring the selected top products for your convenience.
| Product | Brand | Cooling/Heating Capacity | Key Features |
|---|---|---|---|
| Kit Universal A/C Under Dash Heat & Cool 404-000 DBSL | Generic | 12,700 BTU / 359 CFM airflow | 4-way aluminum coil, 3-speed blower, Sanden style compressor, flex duct |
| Saihisday BEU-404-100 Auto A/C Evaporator Assembly Kit | Saihisday | 4107 Kcal/h cooling / 3619 Kcal/h heating, 600 CFM max airflow | 3-speed airflow, electronic thermostat, aluminum evaporator core |
| DOONARCES 12V Universal Under Dash Heater Kit | DOONARCES | Not specified (efficient copper tube heater core) | 4 air vents, energy efficient, includes mounting brackets and accessories |
| 12000 BTU 12V Under Dash Air Conditioner with Heater | hiberry | 12,000 BTU, rapid heating and cooling | Dual mode cold/warm, scroll compressor, titanium-coated coils, compact design |
| TdiriNar 12V Universal Under Dash A/C Evaporator Heater Kit | TdiriNar | Cooling: 22 pass 4-way aluminum evaporator | 3-speed airflow, electronic thermostat, energy-saving, space-saving design |
Kit Universal A/C Under Dash Heat & Cool 404-000 DBSL 12,700 BTU
This kit includes a universal evaporator designed for under-dash installation with 4 black star louvers that provide multi-directional airflow. It features a highly efficient aluminum coil evaporator and a powerful 1.5 ton expansion valve system paired with a Sanden style compressor. The kit supports 12,700 BTU capacity with 359 CFM airflow, making it suitable for diverse vehicles. Installation accessories such as mounting brackets, drain hose, and a 10-foot flex duct are included to facilitate setup. This kit also comes with a rotative 3-speed blower switch and thermostat for custom climate control.
Saihisday BEU-404-100 Auto A/C Evaporator Assembly Kit 600 CFM
The Saihisday kit combines an air conditioning evaporator and heating assembly in one unit. With an adjustable 3-speed blower and an electronic thermostat, it delivers personalized comfort. The cooling capacity reaches 4107 Kcal/h while the heating output is around 3619 Kcal/h. Its aluminum evaporator includes a 22 pass 4-way cooling core and a 6 pass 2-way heating core, ensuring efficient temperature control. Designed as a universal downline unit, it’s ideal for adding air conditioning to factory non-equipped vehicles, trucks, or cars.
DOONARCES 12V Universal Under Dash Heater Kit with 4 Vents
This kit focuses on efficient heating performance, utilizing a high-efficiency copper tube heater core that rapidly warms air passing through the vents. Its powerful blower motor supplies strong warm airflow through four vents to quickly heat vehicle interiors. The kit includes an on/off switch, mounting brackets, hoses, clamping accessories, and fittings, making installation straightforward. Not requiring fuel consumption, it operates with low power consumption similar to factory cooling systems, offering energy efficiency and easy integration with existing radiators or water lines.
12000 BTU 12V Under Dash Air Conditioner with Heater Dual Mode
The hiberry kit offers all-season comfort with instant heating and rapid cooling capabilities. It features a robust 20cc scroll compressor paired with corrosion-resistant titanium-coated evaporator and condenser coils. This system cools from 120°F to 75°F in just 8 minutes and heats from 0°F to 68°F in 10 minutes. Designed for classic cars, trucks, and RVs, its compact size lets you install it in tight spaces without sacrificing cooling or heating power. The unit also includes high-speed 3000-RPM motors for fast air circulation.
TdiriNar 12V Universal Under Dash A/C Evaporator Heater Kit
This under dash heater and evaporator unit features a high-quality 12V air conditioning evaporator designed to retrofit factory non-AC vehicles. Its airflow settings include a 3-gear switch, supporting cooling through a 22 pass 4-way aluminum evaporator and heating through a 6 pass 2-way aluminum coil. The system is not only energy-efficient but also compact, making it perfect for use in campers, trucks, boats, and classic cars. The unit provides balanced temperature control with an electronic thermostat and ensures efficient airflow with low energy consumption.
Buying Guide For Under Dash Heater Kits
When selecting the best under dash heater kit for your vehicle, consider the following key factors to ensure a suitable and effective installation:
- Compatibility: Confirm the kit fits your vehicle type, dashboard space, and existing HVAC setup. Universal kits adapt to most makes but double-check dimensions.
- Heating and Cooling Capacity: BTU or Kcal ratings indicate power. Higher ratings mean more effective temperature control, essential for larger vehicles or extreme climates.
- Blower Speeds and Ventilation: Variable speed blowers allow customizable airflow for comfort. Multiple vents provide better air distribution.
- Installation Accessories: Comprehensive kits include mounting hardware, ducts, hoses, thermostats, and switches. Kits lacking accessories might require additional purchases.
- Power Source and Efficiency: Most kits operate on 12V DC power suitable for vehicles. Energy-efficient kits reduce drain on your battery and fuel resources.
- Compressor Type: Scroll compressors provide quieter, more efficient operation compared to traditional piston types, enhancing comfort.
- Material Quality: Look for aluminum evaporators and corrosion-resistant coils to ensure longevity and reliable performance.
- Installation Ease: Consider kits with clear instructions and included components for easier installation or professional assistance if needed.
Whether upgrading a classic car, outfitting an RV, or improving truck comfort, selecting an under dash heater kit that meets your power needs, space constraints, and installation preferences is vital for optimal heating and cooling performance.