Hot water boiler WTC-GW/GB series

natural gashydrogencondensing

Overview
These wall-mounted condensing boilers Weishaupt Thermo Condens® WTC-GW/GB are compact, high-efficiency generators designed for residential and commercial applications. They are suitable to heat buildings from approximately 500 m². Up to eight boilers can be installed in cascade (GW) to reach a total output of up to 800 kW. The product combines power, efficiency, modularity, advanced control and modern monitoring devices.

Key features / Product benefits

• Aluminium-silicon heat exchanger optimised for efficient heat transfer and protection against corrosion and fouling.
• Wide modulation range (up to 1:8) ensuring continuous burner operation even at low load.
• Self-calibrating SCOT system adapting to different gas qualities and enabling operation with mixtures containing up to 20% hydrogen by volume.
• Intuitive control: "Turn – Push" principle and remote control possible via integrated LAN interface and connection to the WEM portal.
• Quiet operation thanks to fan speed modulation.
• Compact and lightweight: wall-mounted installation possible (e.g. 100 kW ≈ 95 kg); mounting frame option for non-wall installation or cascade setups.

Installation and maintenance

• Can be installed wall-mounted or floor-mounted depending on available space and existing configuration.
• Mounting frame available to facilitate connections (flow/return hydraulics, gas supply, condensate collector, flue gas exhaust).
• Wide access and inspection panels to simplify maintenance and overhaul operations.

Table - Models and data (main excerpts)
Model | Minimum burner output Qc | Maximum burner output Qc | Fuels | Efficiency Eta100 (PCI) | Efficiency Eta30 (PCI) | Energy class | Label scale | Width | Depth | Height | Weight
WTC-GW 45-B H-0 | 6,9 kW | 45,2 kW | Gaz naturel E/H, Gaz naturel LL, Gaz liquéfié P | 98,5 % | 109,3 % | A | A+++ - D | 640,0 mm | 500,0 mm | 792,0 mm | 77,000 kg
WTC-GW 60-B H-0 | 6,9 kW | 60,1 kW | Gaz naturel E/H, Gaz naturel LL, Gaz liquéfié P | 98,3 % | 109,4 % | A | A+++ - D | 640,0 mm | 500,0 mm | 792,0 mm | 77,000 kg
WTC-GW 70-A | 13,4 kW | 70,8 kW | Gaz naturel E/H, Gaz naturel LL, Gaz liquéfié P | 100,6 % | 109,9 % | A | A+++ - D | 640,0 mm | 600,0 mm | 792,0 mm | 95,000 kg
WTC-GW 80-A | 13,4 kW | 77,0 kW | Gaz naturel E/H, Gaz naturel LL | 99,6 % | 109,9 % | A | (valeur non indiquée) | 640,0 mm | 600,0 mm | 792,0 mm | 95,000 kg
WTC-GW 100-A | 13,4 kW | 94,0 kW | Gaz naturel E/H, Gaz naturel LL | 99,1 % | 109,7 % | A | (valeur non indiquée) | 640,0 mm | 600,0 mm | 792,0 mm | 95,000 kg

Characteristics / technical specifications

• Aluminium-silicon heat exchanger with vitrification-type coating (anticorrosion and anti-fouling protection).
• Burner modulation range: up to 1:8.
• Gas compatibility: Natural gas (E/H, LL), liquefied gas P; accepts mixtures up to 20% hydrogen (volume) with automatic SCOT adjustment.
• Indicated efficiencies (examples by model): Eta100 (PCI) ~ 98,1–100,6 %; Eta30 (PCI) ~ 108,4–109,9 % (depending on model and conditions).
• Heating energy efficiency class: A (depending on model and displayed label scale).
• Communication interface: Integrated LAN as standard for connection to the WEM portal and remote control (PC / smartphone).
• Installation: wall-mounted or floor-mounted; possible cascade installation up to 8 units (800 kW) with various layouts (inline, back-to-back, angled).
• Available accessories: domestic hot water (DHW) preparation solutions, flue gas exhaust options, hydraulic accessories, controls and solar sensors for backup or DHW production.
• Reduced noise levels due to fan speed modulation.