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Heating FH2

The Grayson FH2 is a high output 24V DC floor heater designed to deliver reliable passenger saloon heating in heavy vehicle applications. Providing up to 18kW of heat through a long-life brushless blower, the FH2 ensures consistent warmth during cold operating conditions. Robust, serviceable and configurable, it supports comfortable journeys and dependable HVAC performance across a wide range of vehicle platforms.

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Overview

The FH2 floor heater is engineered to provide effective, evenly distributed heating for passenger saloons in buses, coaches and other heavy vehicles.

Operating on a 24V DC supply, the unit delivers up to 18kW of heating output, ensuring fast warm-up and stable cabin temperatures during winter operation. A long-life brushless blower drives consistent airflow, while an easy-clean filter supports straightforward maintenance and sustained performance.

Designed for floor mounting with right-hand pipe orientation, the FH2 integrates easily into vehicle HVAC layouts. Its robust construction and configurable design allow OEMs to tailor installations to suit vehicle layouts, passenger capacity and climate requirements.

Features

The heating system incorporates features designed to provide durable construction, effective heat delivery, and compatibility within integrated thermal management systems.

  • 18kW Heating Output: Delivers strong, consistent saloon heating in cold ambient conditions.
  • 24V DC Operation: Compatible with standard heavy-vehicle electrical architectures.
  • Long-life Brushless Blower: Ensures reliable airflow with reduced maintenance requirements.
  • Single Blower Speed: Simplifies control and system integration.
  • Easy Clean Filter: Supports quick servicing and sustained airflow performance.
  • Floor-Mounted Design: Enables efficient heat distribution within passenger saloons.
  • Right-Hand Pipe Orientation: Supports straightforward plumbing and installation.
  • Configurable Design: Can be adapted to suit specific vehicle layouts and requirements.
Technical

The system’s technical configuration supports reliable heat output and consistent operation, helping maintain stable thermal performance over time.

  • Heating Output: 18kW
  • Supply Voltage: 24V DC
  • Dimensions (L x W x D): 499 × 306 × 197.5 mm
  • Blower: Long-Life Brushless Blower
  • Blower Speed: 1
  • Filter: Easy-Clean Filter
  • Orientation: Right-Hand Pipes
  • Mounting: Floor
Heating Output

18kW

Provides reliable warmth for passenger saloons in cold conditions.
Voltage Supply

24V DC

Designed for compatibility with heavy-duty vehicle electrical systems.
Blower

Brushless

Delivers dependable airflow with long service life.
Mounting

Floor

Optimised for effective heat distribution within passenger areas.
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Compatible Applications

Product Benefits​

Discover why the world’s bus and coach OEMs choose the FH2 Heater to deliver reliable cabin comfort.

Improved Passenger Comfort

Maintains warm, comfortable saloon temperatures during cold-weather operation.

Reliable Winter Performance

High heating output supports demanding duty cycles and low ambient temperatures.

Low Maintenance Design

Easy-clean filter and brushless blower reduce servicing time and cost.

Simple Integration

24V DC supply and single-speed blower simplify system design and control.

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Our Capabilities

Full lifecycle support for OEMs

Grayson delivers end-to-end design, testing, manufacturing, integration and aftersales to create tailored heating solutions for OEM applications. Learn More

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Discover More About Grayson

For more than four decades, Grayson Thermal Systems has delivered high-quality heating and cooling solutions to vehicle sectors around the world. Our expertise supports reliable operation and sustained system efficiency.