ViessTech Premium Heating Systems
High-efficiency condensing boilers and heat pump solutions engineered in Germany for commercial and industrial applications across 63 countries.
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From high-efficiency condensing boilers to next-generation heat pumps, our portfolio covers every commercial and industrial heating requirement.
Wall-hung and floor-standing condensing boilers from 24 kW to 2,400 kW, achieving COP ratings above 0.98 with ultra-low NOx emissions and integrated cascade control.
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Air-source and ground-source heat pumps using R-290 natural refrigerant with COP up to 5.2, designed for commercial buildings, district heating, and industrial process heating.
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Heavy-duty oil and gas-fired boilers for steam generation and hot water production, from 100 kW to 5,800 kW output, PED and ASME certified for demanding industrial processes.
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Intelligent thermostats, weather-compensated controllers, and BMS-integrated platforms for optimized energy management and remote monitoring of heating plants.
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Central heating systems for offices, hotels, hospitals, and multi-tenant complexes with cascade boiler configurations.
Precise temperature-controlled steam and hot water systems for cleanroom environments and GMP-compliant production facilities.
Steam boilers and process heating solutions for pasteurization, sterilization, CIP systems, and food processing lines with HACCP considerations.
Heat recovery boilers and heat pump systems that capture server waste heat for district heating integration and on-site hot water production.
Large-scale centralized boiler plants and heat pump stations for urban district heating networks, biomass-ready and hydrogen-compatible.
High-output steam boilers and thermal oil heaters for chemical processing, textile manufacturing, and heavy industrial applications.
Key moments in our four-decade journey of heating innovation.
Company founded in Stuttgart, Germany. First atmospheric gas boiler (VT-80 series, 80 kW output) enters production for commercial heating market.
Launch of first condensing boiler range (VT-Condensa series) achieving 96% seasonal efficiency. ISO 9001 quality certification obtained.
Opening of third production facility in Bratislava, Slovakia. Cumulative installed base surpasses 200,000 boiler units across 40 countries.
Full R-290 natural refrigerant heat pump portfolio launched. Hydrogen-ready condensing boilers certified for 20% H2 blend across entire commercial range.
Engineering perspectives, product benchmarks, and project outcomes from our team.
Our VT-H2 condensing boiler series passed TUV Rheinland certification for 20% hydrogen-natural gas blended combustion in October 2024, with NOx emissions measured at 28 mg/kWh—42% below the EU Ecodesign 2018 limit of 56 mg/kWh.
Independent testing at EN 14511 conditions confirmed our VT-AeroHP 120 achieves COP 5.2 at A7/W35 and COP 3.1 at A-7/W55. R-290 charge of 4.8 kg per unit, within single-charge safety limits under EN 378-1.
A 2023 cascade boiler retrofit at a multi-tenant office complex in Frankfurt reduced annual gas consumption from 1,280 MWh to 883 MWh—a 31% reduction achieved through weather-compensated flow temperature control and IoT-based fault detection that cut unplanned downtime from 14 hours to under 3 hours per heating season.
Our roadmap to carbon-neutral heating combines ultra-high-efficiency condensing technology, natural refrigerant heat pumps, and hydrogen-ready infrastructure.
100% of new condensing boiler models hydrogen-blend compatible by 2027
R-290 natural refrigerant across entire heat pump portfolio (GWP < 3)
ISO 14001 certified manufacturing with 40% CO2 reduction since 2015
Our engineering team will analyze your requirements and recommend the most efficient boiler or heat pump configuration for your facility.
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