Rooftop air handling unit GRTU 3800+

for large air volumesindustrialheat-recovery

Summary
The GRTU 3800+ is a compact air handling unit with rotary heat recovery up to 84%. It provides ventilation for garages, workshops, sports facilities and production facilities. Available for roof-mounted or floor-mounted installation, it includes EC fans, integrated filters and a modular design for installation, maintenance and accessory integration. Suitable for indoor and outdoor use.

What do you get?

• Energy efficiency: up to 84% heat recovery via a rotary heat exchanger.
• Flexible installation: roof-mounted or floor-mounted configurations.
• Low energy consumption with EC fans equivalent to IE3 class; direct-drive B-impellers; 100% variable airflow control.
• Modular design enabling easy inspection, maintenance and accessory adaptation (rail system for service/accessory integration).
• Integrated filtration for sustained performance and air quality.
• A wide range of accessories to meet different ventilation requirements.
• Environmental Product Declaration (EPD): documented carbon footprint over a minimum 20-year lifespan.

Product information
The unit is fitted with EC fans and direct-drive B-impellers that meet IE3 energy class equivalence; fans are fully variable allowing precise airflow adjustment. The construction is galvanised and sealed for durability. Air inlet and outlet are integrated on the sides; extraction and supply ducts are positioned at the bottom. Installation options include fixed duct connections or a diffuser solution for optimized air distribution. The modular rail system allows inspection, upgrades or adaptation with a broad range of accessories. The GRTU 3800+ is available for outdoor roof mounting (flat or sloping roofs) or as an indoor floor-mounted unit.

Technical data
Material: Galvanised steel
Installation: Indoor/outdoor
Max. air volume: 5,000 m³/h
Max. pressure: 500 Pa
Voltage: 3 x 400 V
Current: 10 A
Weight: approx. 400 kg

Characteristics / technical specifications

• Model: GRTU 3800+
• Heat recovery: Rotary heat exchanger up to 84% efficiency
• Fans: EC fans with direct-drive B-impellers, IE3 energy class equivalence, fully variable
• Filters: Integrated filters for sustained performance
• Construction: Galvanised, sealed design for durability
• Installation: Roof-mounted (flat or sloping) or floor-mounted
• Air connections: Side inlet/outlet, bottom extraction/supply duct positions; option for fixed duct or diffuser distribution
• Max. air volume: 5,000 m³/h
• Max. pressure: 500 Pa
• Electrical: 3 x 400 V, 10 A
• Weight: approx. 400 kg
• Sustainability: Environmental Product Declaration (EPD) covering at least 20 years