Whale Underfloor Space Heater 4kW Gas and Electric - SH4312B

Whale Underfloor Space Heater 4kW Gas & Electric SH4312B

Please note the lead time for this product is approx 6 weeks

The Whale Underfloor Space Heater 4kW Gas & Electric – SH4312B is a high-performance underfloor space heater designed for caravans and motorhomes. It delivers comfortable warm air throughout your vehicle’s interior via a ducted heating system, combining gas and electric heating for flexible, efficient operation.

This compact blown-air heater is built to be installed under the floor of a leisure vehicle and controlled via Whale’s dedicated Advance Control Panel.

Key Features

• 🔥 Gas & Electric Heating: Provides up to 2.9 kW gas and 2.0 kW electric heat input with combined boost for up to ~3.9 kW output.

• 🌡 Boost Setting: Automatically varies heat output based on internal temperature for optimal comfort.

• 🚗 Underfloor Installation: Designed to fit neatly under the living space to maximise usable interior space.

• 💨 Ducted Air Delivery: Distributes warm air via ducting to multiple vents for even heating.

• ⚙️ Compact & Lightweight: Space-efficient design ideal for leisure vehicles.

• 🔌 Advance Control Panel Ready: Works with Whale control panel (sold separately) for convenient temperature control.

Where It Fits

This heater is intended to be installed under the floor of a caravan or motorhome habitation area as part of a ducted hot air heating system. It feeds warm air into duct runs that lead to vents positioned around the vehicle, providing consistent heat distribution throughout living space.

⚠️ This model is not suitable for static caravans or caravan holiday homes and must be installed with a ducted system by a qualified gas engineer.

Technical Specifications

• Brand: Whale

• Model: SH4312B

• Type: Underfloor Gas & Electric Space Heater

• Nominal Heat Input (Gas): 2.9 kW

• Nominal Heat Input (Electric): 2.0 kW

• Maximum Heat Input (Boost): ~3.9 kW

• Duct Diameter: 60 mm ID

• Flue Diameter: 22 mm ID

• Dimensions (approx): Height ~205 mm × Width ~325 mm × Length ~890 mm

• Weight: ~10.9 kg

• Fuel: Butane/Propane 28–30 mbar

• Electric Voltage: 230 V AC 50 Hz (0.5/1.0/2.0 kW options)

• Battery Supply: 12 V DC control circuit

Typical Uses

✔ Keeps caravan/motorhome interiors warm in cold conditions
✔ Integrated underfloor ducted airflow heating
✔ Combines gas efficiency with electric convenience
✔ Works with Advance Control Panel to maintain set temperatures

Why Buy This Space Heater?

• ✔ Genuine OEM quality from Whale

• ✔ Dual fuel flexibility – gas and electric support

• ✔ Efficient ducted heat distribution

• ✔ Compact underfloor design saves living space

• ✔ Boost mode for enhanced performance

Installing the correct underfloor space heater like this ensures your leisure vehicle stays comfortable in a range of conditions, with dependable performance from a well-engineered heating system

• Type	Blown Air Heaters
  Voltage Description	12V DC Input, 230V AC 50Hz Output
  Model	SH4312B
  Height Description	205mm
  Width	325mm
  Depth	890mm
  Weight	10.9kg
  Application	Caravans and Motorhomes
  Fuel	Butane/Propane 28-30mbar - CAT I3B/P (30)
  Heat Output	500 to 2000W
  Gas Consumption	220g/hr
  Country of Origin	United Kingdom

• Due to the non standard nature, this product is non returnable once purchase has been agreed