PTC cabin heater systems – for quick, safe and effective heating of the passenger compartment.

High-Voltage Cabin Heater

BERU develops innovative Positive Temperature Coefficient (PTC) cabin heaters in close cooperation with the automotive industry and manufacturers of climate control systems. Modern day fuel-efficient engines offer improved efficiency and dissipate less waste heat to the cooling system. As a consequence, at low outside temperature these engines do not provide the desired amount of heat quickly.

Innovative cabin heaters from BERU Systems make up for this shortfall of heat. The cabin heater is installed behind the coolant heat exchanger, and it heats the cold air, which then travels through the air duct to the passenger compartment. The cabin heater supplies heat in the passenger compartment and defrosts the windscreen in seconds.

Various vehicle models from leading manufacturers around the world are equipped with the cabin heaters by BERU. (These systems cannot be retrofitted).

The model series at a glance

BERU offers a wide range of cabin heaters, from the compact mechanical model to the electronically controlled comfort system that can be flexibly adapted to customer’s requirements and specifications.

The cabin heaters are categorized into 5 product lines that differ in types of control and functional capabilities (diagnostic capability, heater output...) as well as start-up behaviour.

Features of the new cabin heater models

• Reduced weight as compared to its predecessors with fins. (in case of the "Plain Line" Series - up to 30 percent)
• New design allows development of compact three stage heaters with a profile width of 70 millimetres only
• Multiple heater stages are possible. Single-stage mini-heaters for decentralised heating can be produced just as readily as powerful four- or five-stage heaters with electronic control
• Twice the thermal safety and longer service life: In all high-output models, the switching elements and the PC boards are thermally isolated from each other by a bus bar; in addition, an excess temperature cut-out is incorporated into the cabin heater electronics
• Shorter development times for customer-specific applications and reduced tooling manufacturing time

Comfort Line

The high-tech cabin heater solution from BERU with maximum functionality, performance and convenience. Microprocessor-based, 0 – 100% variable control of heat output. Output power, functioning and diagnosis are based on one of the common bus systems such as CAN or LIN. The intelligent control behaviour of the BERU Comfort Line minimises power fluctuations in the on-board electrical system. Battery voltage, current levels, power transistors and heater rods are continuously monitored to initiate appropriate countermeasures in the event of a sudden voltage drop, short circuit or similar fault condition.

Basic Line

Easy-to-install, microprocessor-controlled cabin heater as a plug & play solution requiring noticeably less wiring in the vehicle. In this compact design, the heater rods are supplied power individually via PWM-controlled power transistors. The heat output is continually adjusted to satisfy actual requirements with its closed-loop concept. Internal diagnostic functions monitor, among other items, the temperature, voltage and current drawn by the power transistors.

E-Relay Line

Especially compact cabin heater with integrated wear-free Smart-Power switches instead of mechanical switches. Benefits: No mechanical switching noise, longer service life than mechanical relays and optimal safety due to built-in temperature monitoring.

Plain Line

Single or multi-stage auxiliary heaters for classic standard applications. The controls employ relays mounted externally in a control box in the vehicle.

Mini cabin heater for decentralised installation

(size: approx. 40 mm wide, 75 mm long)
Decentralised systems for heating in very specific area without large air ducts. These heaters can be used very effectively when the space available for multi-zone climate control systems with individual heating zones is limited. Flexibility to use combined air supply or separate fans.