COOLING · HEATING · YEAR-ROUND TRAVEL

Comfort in every season.

Air conditioning for summer, diesel heaters for winter—honest advice and professional installation.

Request consultation View system

Comfort in every season. – GNS Reisemobiltechnik

Roof and under-bench air conditioningPlanned and documented

Webasto and EberspächerProfessional installation

Clean apertures and power supplyMatched to your vehicle

Honest system planningExplained personally

GNS REISEMOBILTECHNIK

Comfort matched to your motorhome.

We inspect the vehicle, usage profile, existing equipment and available space before recommending and installing a complete solution.

Roof and under-bench air conditioning
Webasto and Eberspächer
Clean apertures and power supply
Honest system planning

Professional installation at GNS Reisemobiltechnik

summerreliable cooling

winteroff-grid heating

2 systemsone travel goal

GNS SERVICE RANGE

Cooling, heating and ventilation matched to vehicle length.

Roof space, vehicle length, power reserve, noise and season determine the right solution. GNS combines roof air conditioning, diesel heating, ventilation and app control.

Roof air-conditioner installation on a motorhome — AI visualisation · installation example · roof air conditioner

Roof air conditioning by vehicle size

The range includes Dometic FreshJet 2,200 W and Truma Aventa systems from 1,700 to 2,400 W for compact vans through larger motorhomes.

FreshJet 2200: 787 × 225 × 562 mm · 32 kg · 2,200 W / 7,500 BTU/h cooling · 1,200 W heating
FreshJet: soft start on 2,000/2,200 W, LED light, adjustable airflow and remote control
Aventa Compact: 785 × 560 × 265 mm · 27.5 kg · 1,700 W
Aventa Compact Plus: 785 × 560 × 265 mm · 29.5 kg · 2,200 W
Aventa Comfort: 1,008 × 660 × 248 mm · 33 kg · 2,400 W cooling / 1,700 W heating
Aventa Comfort: sleep mode, timer, four air outlets and 1°C adjustment steps

Dometic FreshJet FJX7

The FJX7 combines variable-speed compressor and heat-pump technology with a quiet night mode, CleanAir function and app control on compatible versions.

FJX7 2200 with 2,200 W cooling output
Output selected for vehicle size and power reserve
Optional air distributor with touch control
Roof layout coordinated with solar and ventilation

Webasto and Eberspächer diesel heaters

Air Top Evo 40 and Airtronic systems provide modulated heat and can supplement or replace an existing system in the cabin, double floor or underbody.

Quiet low-consumption night operation
Output matched to the vehicle and climate
Dimensions, fuel consumption and electrical load confirmed from the current product sheet
Altitude capability checked for the selected model
Voltage and temperature limits documented at handover

MaxxFan and connected control

MaxxFan Deluxe ventilates even in rain and while driving. Truma iNet adds compatible-device status, alerts and remote control.

Thermostatic roof ventilation
Truma iNet changes automatically from SMS to Bluetooth at close range
Status and alarm messages plus regular updates
Roof plan coordinated with solar and satellite

PRODUCTS & SYSTEMS

The GNS range in detail.

Open a product to see functions, technical data and installation notes. Before ordering, GNS always checks the current model generation and suitability for your vehicle.

01Dometic FreshJet 2200

Dometic FreshJet 2200 roof air conditioner

Ultra-compact roof air conditioner for cooling and dehumidifying vehicles up to about seven metres, with soft start and integrated air distribution.

LED room lighting
Adjustable airflow
Remote control and low start-up current

Dimensions: 787 × 225 × 562 mm
Weight: 32 kg
Cooling output: 2.200 W / 7.500 BTU/h
Heating output: 1.200 W

02Truma Aventa Comfort 2400

Truma Aventa Comfort roof air conditioner

High-output roof air conditioner for larger vehicles with reversible cooling circuit and four independently adjustable draught-free outlets.

Sleep mode
Timer and 1 °C adjustment
Remote control and heating function

Dimensions: 1.008 × 660 × 248 mm
Weight: 33 kg
Cooling output: 2.400 W
Heating output: 1.700 W

03Truma Aventa Compact / Compact Plus

Truma Aventa Compact roof air conditioner

Two especially compact and quiet variants for campervans and motorhomes. The Plus version provides 2,200 W for vehicles up to about seven metres.

Low-profile air distributor
Remote control
App control with optional Truma iNet Box

Dimensions: 785 × 560 × 265 mm
Compact: 1.700 W · 27,5 kg
Compact Plus: 2.200 W · 29,5 kg

04MaxxAir MaxxFan Deluxe

Roof fan for intake and exhaust ventilation in rain and while driving. With the cover closed, it operates as an interior ceiling fan.

Impact- and UV-resistant cover
Electronic thermostat
Operation while driving

05Webasto Air Top Evo 40

Webasto Air Top Evo 40 diesel air heater

Continuously modulated diesel air heater for primary or supplementary heating, installable inside, in a double floor or beneath the vehicle.

Quiet continuous operation
Low fuel consumption
Flexible installation position

Dimensions: 423 × 148 × 162 mm
Weight: 5,9 kg
Heating output: 4 kW
Fuel consumption: 0,18–0,43 l/h

06Eberspächer Airtronic D4 Plus

Eberspächer Airtronic D4 Plus diesel heater

Fast-regulating 12 V diesel heater for a consistently warm, drier interior and especially quiet night operation.

Five output stages
Quiet, efficient night operation
Interior, double-floor or underbody installation

Dimensions: 376 × 140 × 150 mm
Weight: 4,5 kg
Heating output: 900–4.000 W
Fuel consumption: 0,11–0,51 l/h

07Truma iNet Box

Central interface for remotely controlling compatible Truma heating and air-conditioning systems through the Truma app.

Status and alarm notifications
SMS and Bluetooth
Expandable and updateable

08Dometic FreshJet FJX7 2200

Variable-speed inverter roof air conditioner with heat pump, especially quiet sleep mode and app control.

CleanAir technology
Dometic Climate app
Optional touch air distributor

Cooling output: 2.200 W
Other variants: 3,000 W / 3,500 W in the GNS range

09Eberspächer Airtronic M3 Commercial

Eberspächer Airtronic M3 Commercial installed in a vehicle

A 4 kW heater designed for continuous and night operation, with stepless control, quieter metering pump and integrated altitude adjustment.

Altitude adjustment up to 5,500 m
Very low power consumption
Steady night operation

Voltage: 12 / 24 V
Heating output: 1.050–4.000 W
Power consumption: 6–37 W
Fuel consumption: 0,12–0,49 l/h
Weight: 4,5 kg

Technical data is based on the described GNS range. Availability, model generation and vehicle-specific approval are confirmed in the quotation.

SYSTEM DETAILS

The best result comes from a complete system.

Every component is selected, installed, documented and explained as part of one reliable motorhome system.

01Roof and under-bench air conditioning

02Webasto and Eberspächer

03Clean apertures and power supply

04Honest system planning

PROFESSIONALLY INSTALLED

From inspection to handover.

01Inspect vehicle

02Clarify travel profile

03Plan the system

04Install professionally

05Test and document

06Personal handover

Installation and inspection in the GNS workshop

FREQUENTLY ASKED QUESTIONS

What to know before installation.

Can air conditioning run without hook-up?

Yes, for limited periods with sufficient lithium capacity and a suitable inverter.

How much diesel does a heater use?

Depending on output, typically around 0.1–0.5 litres per hour.

Diesel or gas heating?

That depends on the vehicle tank, noise preferences and travel profile.

TWO WORKSHOPS

Which heating and air-conditioning solution is right for your motorhome?

We inspect your vehicle, needs and existing technology—personally at two workshops.

Nordrhein-Westfalen+49 2161 466 73 88

Bayern+49 8765 327 05 45

Request consultation

Ready for more independence on the road?

We usually reply within one working day.

Book an appointment