Thermo Technica Combi Heater 4E Bare Bones Direct Drop-In Replacement – LPG & Electric 2026 | 5 Year Warranty

Thermo Technica LPG Combi Heater 4E – Bare Bones Retrofit Kit (2026 Model)

Looking for a reliable and affordable replacement combi heater for your factory-fitted Truma? The Thermo Technica LPG Combi Heater 4E offers a modern, efficient upgrade for your motorhome heating and hot water system.

Designed originally as a full kit, the bare bones option provides a direct drop-in replacement, for Truma Combi 4E and 6E heaters with minimal effort. As a result, you can upgrade your system without a complicated installation.

A Smarter Alternative to Truma Heaters

At Thermo Technica, we design products for real motorhome users. Like many owners, we were frustrated by expensive and outdated heating systems. So, we built a better option.

As a result, this motorhome combi heater delivers:

• Improved fuel efficiency
• Modern controls
• Reliable, long-term performance

If you want a dependable Truma alternative, this system gives you more control at a better value.

Control Your Motorhome Heating Anywhere

With built-in Bluetooth, you stay in control wherever you travel.

Simply connect your phone using:

• Android (APK app)
• Apple (MyBluee app)

Whether you’re off-grid or parked up for the night, you can adjust your heating instantly. In addition, the system supports backwards compatibility, so even older setups can benefit from smart control.

Faster Heating, Lower Fuel Use

We redesigned this LPG combi heater from the ground up. Instead of minor upgrades, we improved the components that matter most.

For example, enhanced sensors and a refined motor deliver:

• Faster heat-up times
• Quieter operation
• Better LPG efficiency

As a result, you get hot water and cabin heat exactly when you need it—without long delays.

Built for Motorhome Life

Unlike many heaters that rely on plastic parts, this unit uses durable metal construction. Therefore, it handles vibration, road movement, and regular use with ease.

So, whether you’re touring across the UK or heading off-grid, this motorhome heating system is built to last.

What’s Included in the Retrofit Kit

This bare bones retrofit kit includes all essential components:

• 10L hot water tank
• 4 heated air outlets
• Digital control panel with summer and winter modes
• 220V–240V mains electric heater
• LPG and electric combi heater unit
• Integrated Bluetooth control

Simple Retrofit Installation

This  replacement heater kit reuses your existing ducting and installation components. Therefore, you can upgrade your motorhome heating system without a full system overhaul.

As a result, installation stays quicker, easier, and more cost-effective.

Upgrade Your Motorhome Heating Today

If you’re replacing a Truma unit or upgrading your setup, the Thermo Technica LPG Combi Heater 4E gives you a smarter, more efficient solution.