Giersch Gmbh

What Giersch Gmbh does

Giersch GmbH, founded in 1951 and headquartered in Hemer, Germany, is a privately held manufacturer of heating systems serving commercial, industrial, and residential customers worldwide. The company develops oil burners, gas burners, dual-fuel burners, gas and oil condensing boilers, heat pumps (air/water, brine/water, drinking water), hybrid heating systems, and solar/PV-T (photovoltaic-thermal hybrid) collectors, with product power ranges spanning 2 kW residential units to 18 MW industrial installations. Giersch self-describes as one of the world's leading manufacturers of oil, gas, and combination burners and operates from a single primary site in Hemer; its registered office is listed in Iserlohn.

Technical differentiation centers on three vectors. First, the DUO-HYBRID system integrates a gas condensing unit with a CTC (compact thermal collector) brine/water heat pump and PV-T collectors, claimed to cover up to 80% of annual heating demand regeneratively without the ground-source drilling required by traditional geothermal heat pumps. Second, the oil burner portfolio has been progressively certified for HVO100 (hydrotreated vegetable oil, a paraffinic renewable diesel) biofuel operation under the BIO-Heizöl-Ready designation, enabling up to 90% CO2 emissions reduction versus fossil heating oil. Third, the portfolio is built around regulatory compliance with EN 267 (oil burners) and EN 676 (gas burners) emission class standards, including low-NOx (nitrogen oxide) combustion below 120 mg/kWh, and heat pumps achieve COPs (Coefficient of Performance, the ratio of useful heat output to electrical input) up to 5.50 with modulating scroll compressor designs and internet-connected controls.

Giersch operates an exclusively channel-based go-to-market through a certified Fachpartner network of tradespeople (Handwerk), architects, and engineering specialists. Partners undergo structured half-day training blocks and access a partner portal with planning tools, technical documentation, and marketing materials; advanced certification is required to commission and maintain DUO-HYBRID systems. The company runs direct international training sessions at its Hemer headquarters for export markets, notably Poland and Romania in 2026. Revenue derives from one-time equipment sales, with no pricing publicly disclosed; German buyers may access subsidies of up to 45% under the BEG (Bundesförderung für effiziente Gebäude / Federal Funding for Efficient Buildings) program for qualifying systems. Leadership comprises Managing Director Niclas Persson and Supervisory Board Chairman Peter Berg, with the company having processed the June 2026 retirement of long-tenured executive Michael Klenner.

Name

Giersch Gmbh

Legal name

Giersch GmbH

Website

https://giersch.de

Company type

Private

Founded year

1951

Operating status

Operating

Headcount range

1–10 employees

Short description

Giersch GmbH, founded in 1951 in Germany, manufactures oil and gas burners, condensing boilers, heat pumps, and hybrid heating systems. It serves commercial, industrial, and residential customers worldwide exclusively through a certified Fachpartner distribution network.

Ownership category

akta.pro rank

Product category

Heating Equipment Manufacturing

NAICS

Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341), Power Boiler and Heat Exchanger Manufacturing (33241)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Oil & Gas Field Machinery & Equipment (3533)

akta.pro primary industry

Chillers & Cooling Plant Equipment (IMAHAKAE)

Keywords

• Oil burners
• Gas burners
• Condensing boilers
• Heat pumps
• Hybrid heating systems

Headquarters

HQ city

Hemer

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Technology or R&D, Personnel, Marketing or Sales, Infrastructure

Revenue model

1. Heating Equipment Sales: Giersch generates revenue through the sale of heating equipment including oil burners, gas burners, condensing kettles (oil and gas), heat pumps (air/water, brine/water, drinking water), hybrid systems (DUO-HYBRID), solar collectors, and control systems. Products are sold exclusively through certified Fachpartner (specialist trade partners) to end customers in commercial, industrial, and residential sectors.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels8 records

Core offering

Giersch GmbH develops and manufactures oil, gas, and dual-fuel burners, gas and oil condensing boilers (GiegaStar series, FCU-BHR), air/water and brine/water heat pumps, drinking water heat pumps (GiegaNova R290), solar/PV-T collectors (Flachkollektor FKS, DUO-PANEL), and weather-compensated control systems (Giematic, EcoLogic). Its flagship DUO HYBRID system combines gas condensing technology with a regenerative heat pump and PV-T collectors to cover up to 80% of annual heating requirements regeneratively. All products are sold exclusively through a certified Fachpartner network serving commercial, industrial, and residential applications worldwide with power ranges from 2 kW to 18 MW.

Product overview

Giersch GmbH is a medium-sized company founded in 1951, developing into one of the world's leading manufacturers of oil, gas, and combination burners with power ranges up to 18 MW. The product portfolio includes: Gebläsebrenner (blower burners for oil/gas) encompassing Ölbrenner (oil burners), Gasbrenner (gas burners), Zweistoffbrenner (dual-fuel burners), and Universalölbrenner (universal oil burners); Brennwert (condensing technology) including Gasbrennwertkessel (gas condensing boilers: GiegaStar Advanced, GiegaStar Advance, GiegaStar plus, GiegaBloc plus) and Ölbrennwertkessel (oil condensing boilers: FCU-BHR); Wärmepumpe (heat pumps) comprising Trinkwasser-Wärmepumpe (GiegaNova R290), Luft/Wasser Wärmepumpe (EcoAir Series 400/600), and Sole/Wasser Wärmepumpe (EcoPart, GS, GSi series); Regelung (controls) including Giematic comfort OT/plus OT and EcoLogic M/L; Solar/Photovoltaik (Flachkollektor FKS); and the core hybrid product DUO HYBRID combining gas condensing with heat pump technology and DUO-PANEL hybrid collectors. Products are designed for residential, commercial, and industrial applications with full European and international standard compliance.

Differentiator

Problem solved

Functional benefit

Products and services

• Oil Burners (Ölbrenner) Blower-type oil atomization burners across multiple series including Interzero S (14.8-62.9 kW), GL10/20-LN (24-216 kW), GB3000 (15-35 kW), M series (534-2500 kW), and R series (12-2730 kW). Products are approved according to DIN EN 267 with low-emission combustion achieving NOx emissions below 120 mg/kWh. Several models carry BIO-Heizöl-Ready certification for HVO100 renewable fuel operation. Designed for commercial, industrial, and residential heating applications.
• Gas Burners (Gasbrenner) Gas blower burners across multiple series including GG-LN (12-235 kW), MG-LN (90-1350 kW), MG40-LN (4.9-6.3 MW), RG (15-260 kW), and MG (95-2800 kW). Low-emission performance certified to EN 676 Emission Classes 1, 2, 3, and 5. Features innovative hybrid blower technology for wide modulation range. Designed for natural gas, LPG, or town gas operation in commercial and industrial heating systems.
• Dual-Fuel and Universal Oil Burners (Zweistoffbrenner / Universalölbrenner) Dual-fuel burners (MK2/MK3 series, 279-2720 kW) for combined oil and gas operation, plus the GUPO universal oil burner (25.4-195 kW) capable of combusting vegetable, animal, and mineral oils without conversion work using compressed air atomization. Provides fuel flexibility for installations requiring alternate fuel capability.
• Gas Condensing Boilers (Gasbrennwertkessel — GiegaStar series) Wall-hung and floor-standing gas condensing boilers including GiegaStar Advanced (2.0-109.7 kW), GiegaStar Advance (8.0-109.7 kW, launched 2026), GiegaStar plus (3.0-89.5 kW), and GiegaBloc plus 200 (20-217 kW). Feature aluminium-silicon cast heat exchangers with modulating power control from 100% down to 10-20%. Achieve up to 110% efficiency and support cascade configurations up to 416 kW wall-mounted. GiegaStar plus includes a 10-year warranty on Al-Si 11 heat exchanger with annual inspection.
• Oil Condensing Boiler (Ölbrennwertkessel — FCU-BHR) Oil condensing boiler (6.9-30.9 kW) with stainless steel heat exchanger and digital combustion management. Approved for HVO100 bio-heating oil operation achieving up to 90% CO2 emission reduction. Large-surface acid-resistant stainless steel heat exchanger provides optimal heat transfer and long service life. Designed for residential heating applications transitioning away from fossil fuels.
• Low-Temperature Boiler (Niedertemperaturkessel — GNTS) GNTS 21 and 31 kW low-temperature boilers for residential applications, providing traditional non-condensing heating technology suited to existing installations.
• Air/Water Heat Pumps (Luft/Wasser Wärmepumpe — EcoAir series) Modulating air/water heat pumps for outdoor installation including EcoAir Serie 600 (2.2-22 kW, COP up to 5.06) and EcoAir Serie 400 (5-22 kW, COP 3.8). Feature efficient scroll compressors, electronic expansion valves, and newly designed fans. Generate heat at outdoor temperatures down to -22°C with supply temperatures up to 65°C. No ground drilling required.
• Brine/Water Heat Pumps (Sole/Wasser Wärmepumpe — EcoPart, GS, GSi series) Brine/water heat pumps across multiple series including GSi-608/612/616 (2.5-16.0 kW, COP 5.50, modulating), GS-606/608 (fixed-speed, COP up to 4.77), and EcoPart 400/600M (5.9-33.8 kW, COP up to 4.6). Feature integrated fresh water stations, heating buffers, sound-damped scroll compressors, and 4.3-inch colour touchscreens with internet interface. Supply temperatures up to 65°C. Designed for ground-source installations using geothermal probes.
• GiegaNova 200-250 R290 Drinking Water Heat Pump Drinking water heat pump using environmentally friendly R290 (propane) refrigerant with COP up to 3.3. Available in 200 and 250 litre sizes. Extracts free energy from outside air and features high-quality hard foam insulation for heat retention. Multiple operating modes include time program, comfort mode, DHW boost, and holiday mode. Can reduce CO2 emissions by up to 90% compared to conventional gas or oil heating.
• DUO HYBRID Heating System Hybrid heating system combining gas condensing technology with regenerative heat pump technology. PV-T collectors on the roof generate electricity, a CTC heat pump handles base load heating, and a condensing unit provides peak load backup. Covers up to 80% of annual heating work regeneratively without requiring ground drilling or buried surface collectors. Features stepless electric heating element (stufenloser E-Heizstab) for using excess PV power and a web interface for remote monitoring and control. The complete DUO-COMPACT base unit integrates sole/water heat pump, scroll compressor, electronic expansion valve, condenser, evaporator, and safety components.
• DUO-PANEL Hybrid Collector Hybrid collector that simultaneously generates electricity (PV) and thermal energy. Uses waste heat from rear-mounted absorber to cool the collector and increase PV output. Generated solar heat serves as heat source for heat pump operation. Made in Germany; provides an alternative to ground-source heat extraction or air-source heat pumps. Used as part of the DUO HYBRID system architecture.
• Flachkollektor FKS Solar Thermal Collector Flat plate solar collector with high-efficiency full-surface absorber optimized in form and function for solar thermal energy generation. Used for solar support of heating and hot water systems.
• Heating Control Systems (Regelung — Giematic, EcoLogic) Weather-controlled electronic controllers for heat pumps and heating circuits, including EcoLogic L (up to 4 heating circuits, internet-ready), EcoLogic M (up to 2 heating circuits and 2 heat pumps in cascade), and Giematic comfort/plus OT variants for gas and oil condensing boilers with up to 12 clock channels, multi-language display, and automatic hydraulic detection.
• EcoZenith Heat Pump Hygiene Storage Combined heating buffer, hot water preparation, and heat pump control unit including EcoZenith i 555 PRO (540 litre buffer volume, internal fresh water preparation up to 40 l/min via plate heat exchanger for legionella-free drinking hot water, built-in solar coil, integrated heat pump control with 4.3-inch colour touchscreen and internet interface) and EcoZenith i 360 (225 litre buffer volume).

Quantifiable outcome

• DUO-HYBRID system covers up to 80% of annual heating work regeneratively
• +9 more outcomes

Segments2 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature12 records

Partnerships

Two partnerships are on record, tiered supporting.

• ENERTECH GroupsupportingGTM or Marketing PartnerENERTECH Group supports certified Fachpartner with marketing materials and the know-how needed for individualizing their company presence. This includes image brochures, direct mail, internet presentations, press work, and selected customer promotion activities. The partnership enables Giersch's Fachpartner network to maintain professional brand appearances while individualizing their own business communications.
• POLYSUN SoftwaresupportingTechnology or IntegrationGiersch works with POLYSUN Software, one of the most reputable software providers in the field of system simulation. The company uses this software to create system simulations and economic calculations for customers, and is confident in competing for comparison in this area.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Bosch Thermotechnology: Division of Bosch offering a broad portfolio of heating, hot water, and air conditioning solutions including the Buderus, Junkers, and Loos brands. Overlaps with Giersch across gas/oil burners, condensing boilers, and heat pumps, but at significantly larger scale and global reach.
• Daikin: Global Japanese HVAC leader producing heat pumps, air conditioning, and refrigeration equipment with growing European heating market presence through the Daikin Altherma line. Competes with Giersch on heat pump technology and broader HVAC systems, though much larger and broader portfolio.
• Junkers Bosch: Bosch residential heating brand offering gas condensing boilers, hot water solutions, and increasingly heat pumps. Direct competitor to Giersch in the German residential condensing boiler segment, though broader in distribution and marketing reach.
• Buderus: Bosch-owned German heating brand offering condensing boilers, heat pumps, and commercial/industrial heating systems. Overlaps with Giersch on condensing boiler and burner product lines, particularly for commercial and industrial customers in Germany.

Direct peers

• Weishaupt: German manufacturer of oil, gas, and dual-fuel burners for residential, commercial, and industrial heating applications. Most direct competitor to Giersch in the industrial burner segment with similar capacity ranges and European market focus.
• Wolf GmbH: German heating and ventilation OEM offering gas condensing boilers, heat pumps, hybrid systems, and HVAC products for residential and commercial applications. Comparable product overlap with Giersch in condensing boilers and hybrid heating systems.
• Stiebel Eltron: German manufacturer specializing in heat pumps, hot water heat pumps, and renewable heating technology. Direct competitor to Giersch in the residential heat pump segment (air/water, brine/water, drinking water) and a leading beneficiary of the German heat pump mandate.
• Viessmann: German family-owned heating manufacturer offering condensing boilers, heat pumps, hybrid systems, and industrial burners across residential and commercial segments. Closest comparable to Giersch on product breadth, German Mittelstand heritage, and hybrid heating strategy, though considerably larger in scale.
• Vaillant: German heating OEM offering gas condensing boilers, heat pumps (aroTHERM, flexoTHERM), and hybrid systems for residential and light commercial markets. Competes with Giersch on residential boiler, heat pump, and hybrid system product lines, particularly in DACH.

Emerging players

• Fröling: Austrian manufacturer of biomass heating systems (wood chip, pellet, log boilers) and increasingly heat pump technology. Competes with Giersch in the commercial and industrial heating segment with a renewable-focused portfolio that addresses the same energy transition opportunity.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@GierschGmbH
• Facebookfacebook.com/GierschGmbH
• LinkedInde.linkedin.com/company/giersch
• Instagraminstagram.com/giersch_gmbh

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Giersch Gmbh