Holter
Holter GmbH Versorgungstechnik is a family-owned German HVAC, sanitary, and pipe rehabilitation contractor founded in 1964, serving residential and property management customers in North Rhine-Westphalia via its proprietary HST trenchless pipe lining technology and multi-OEM heating installations.
- Company typePrivate
- Founded1964
- HeadquartersKorschenbroich, Germany
- Headcount1–10
- GTM typeB2B and B2C
- OfferingServices
What Holter does
Holter GmbH Versorgungstechnik is a family-owned German HVAC, sanitary, and pipe rehabilitation contractor founded in 1964 and headquartered in Korschenbroich-Glehn, North Rhine-Westphalia. The company serves residential property owners primarily in a ~30-50km radius around Korschenbroich for heating, sanitation, ventilation, and climate installations, while delivering its proprietary HST (HST-Verfahren) trenchless pipe rehabilitation service nationwide and across borders. HST uses corundum-air blasting for internal pipe cleaning followed by ceramic-based epoxy resin coating applied via compressed air and travel balls, suitable for DN 10-150mm pipes in copper, iron, and lead — achieving up to 70% cost savings versus full pipe replacement and is backed by insurance recognition and a new-value guarantee (EN16421 certified).
The company operates four integrated service lines: (1) heating system installation and modernization (gas/oil condensing boilers, heat pumps, solar thermal, with up to 70% government subsidies), (2) sanitary and bathroom installations, (3) ventilation and climate technology, and (4) the HST pipe rehabilitation specialty. It is a Vaillant Partnerunternehmen and an authorized installer for Viessmann, Buderus (Bosch), Dimplex, Stiebel Eltron, and Weishaupt, plus sanitary brands Grohe, Geberit, Ideal Standard, and Uponor. Pricing is project-based for installations and trenchless rehabilitation, with annual maintenance contracts priced as a lump-sum (Pauschale) based on 90 minutes of labor plus travel, and hourly SHK labor rates from €32.50 to €67.50 net.
Distribution is direct field sales and service delivery by employed SHK technicians with no third-party resellers; an online product catalog and configurators (heating cost calculator, floor heating price calculator, bath planner) drive top-of-funnel lead capture. The customer base spans residential homeowners (primary), property management companies and housing associations (mid-market repeat B2B), commercial/industrial clients, and municipal accounts (e.g., Stadt Korschenbroich, Sparkasse Neuss, Patrizia Immobilien AG). Leadership is in family hands, with Henrik Holter serving as Managing Director (Geschäftsführer) since joining in 2013 alongside Peter Holter and Mathias Esser.
Holter firmographics
Firmographics- Name
- Holter
- Legal name
- Holter GmbH Versorgungstechnik
- Website
- https://holtergmbh.de
- Company type
- Private
- Founded year
- 1964
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Holter GmbH Versorgungstechnik is a family-owned German HVAC, sanitary, and pipe rehabilitation contractor founded in 1964, serving residential and property management customers in North Rhine-Westphalia via its proprietary HST trenchless pipe lining technology and multi-OEM heating installations.
- Ownership category
- akta.pro rank
Holter industry classification
Industry- Product category
- Building Services — HVAC, Sanitary & Pipe Rehabilitation
- NAICS
- Plumbing, Heating, and Air-Conditioning Contractors (238220)
- SIC
- Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070)
- akta.pro primary industry
- Plumbing & Pipefitting Contracting (IMAFALAC)
- akta.pro secondary industries
- Mini-Split / Ductless HVAC Service & Repair (HSAOAHAH), Boiler Repair, Maintenance & Tune-Ups (HSAOACAD), Emergency Frozen/Thawing Pipe Service (HSAOAMAH)
Keywords
Where Holter is headquartered
LocationHeadquarters
- HQ city
- Korschenbroich
- HQ country
- Germany
- HQ region
- Europe
Offices1 record
Markets served
Holter business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Supply Chain, Marketing or Sales, Technology or R&D, Infrastructure
Revenue model
- Installation and Construction Services: One-time project-based revenue from the installation of heating systems (gas/oil condensing boilers, heat pumps, solar thermal), sanitary systems, climate and ventilation equipment. Services are priced per labor hour and materials. Includes new builds and modernization projects.
- Maintenance and Service Contracts: Annual maintenance contracts for heating systems, offered as flat-rate pauschal (lump-sum) pricing based on 90 minutes of labor plus travel. Spare parts billed separately.
- Pipe Rehabilitation (HST Procedure): Project-based revenue from trenchless pipe inner rehabilitation for drinking water pipes and floor heating circuits. Billed per project based on property size and number of heating circuits. Cost savings of up to 70% vs. full pipe replacement drives customer adoption.
- Product Sales (Online Shop): E-commerce revenue from the online shop selling Buderus heating products and packages (gas condensing units, control units, expansion vessels). Customers select products and submit quote requests.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | SHK Mechanic (Meister/Monteur) labor rate |
| Unit Pricing | Pay-as-you-go | SHK Assembly Specialist labor rate |
| Unit Pricing | Pay-as-you-go | SHK Assembly Assistant labor rate |
| Unit Pricing | Annual | Annual Heating Maintenance (Pauschale) |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels7 records
Holter product offering
Product offeringCore offering
Holter GmbH is a family-owned HVAC, plumbing, and pipe rehabilitation contractor founded in 1964, headquartered in Korschenbroich, Germany. The company installs and modernizes heating systems (gas/oil condensing boilers, heat pumps, solar thermal), sanitary and bathroom installations, ventilation and climate systems, and offers the proprietary HST trenchless pipe rehabilitation technology for drinking water and floor heating pipes. Operations span heating, sanitation, and climate installations regionally within ~30–50km of Korschenbroich, while pipe rehabilitation services are delivered nationwide across Germany and into neighboring countries.
Product overview
Holter GmbH is a plumbing, heating, and HVAC contractor founded in 1964, offering a portfolio of heating products, sanitary installations, and pipe rehabilitation services. Their heating product lineup centers on Buderus gas condensing boilers (GB182i, GB192i, GB172, GB102S series) with smart-home integration via the Buderus EasyControl app. Their specialty is the HST pipe rehabilitation technology for trenchless interior pipe coating of drinking water pipes and floor heating systems, achieving up to 70% cost savings versus replacement. They also install systems from Viessmann, Vaillant, Stiebel Eltron, and Weishaupt. Service categories include heating technology, sanitary technology, ventilation and air conditioning, and a free online heating cost calculator. The company operates primarily in NRW (North Rhine-Westphalia) with nationwide pipe rehabilitation services.
Differentiator
Problem solved
Functional benefit
Products and services
- HST Pipe Interior Rehabilitation (Rohrinnensanierung) Trenchless (no-dig) pipe rehabilitation service for drinking water pipes and floor heating systems using the proprietary HST procedure — corundum-air blasting to clean pipe interiors followed by ceramic-based epoxy resin coating. Suitable for copper, iron, lead, and other pipe materials in nominal diameters DN 10–150mm. Delivers up to 70% cost savings vs. full pipe replacement with a new-value guarantee. Available nationwide and into neighboring countries.
- HST Floor Heating Rehabilitation Specialized variant of the HST procedure adapted for floor heating circuits. Involves water drainage via hose lines, chemical-free sludge removal using corundum-pressure air, drying, and epoxy resin coating. System is operational again 24–48 hours after the procedure, with noise and dust emissions reduced to a minimum.
- Heating Technology Services (Heizungstechnik) Full-service heating technology including condensing boilers for oil and gas, solar systems, heat pumps (air-water, ground source), wood heating systems, consulting and cost calculations. Brands installed include Buderus, Viessmann, Vaillant, Stiebel Eltron, Weishaupt, and Bosch. Customers can access up to 70% government subsidies for heat pump installations.
- Sanitary Technology Services (Sanitärtechnik) Sanitary installations for private and public sectors including water supply, wastewater disposal, modern kitchen and bathroom technology, complete bathrooms, swimming pool technology, hot water systems, backflow protection, water treatment, rainwater harvesting, and canal cleaning. Brands used include Grohe, Geberit, and Ideal Standard.
- Ventilation & Air Conditioning Services (Lüftungs- & Klimatechnik) Controlled residential ventilation with up to 98% heat recovery from exhaust air, split air conditioners, and single-room ventilation. Services include planning, installation, maintenance and repair of ventilation and cooling systems.
- Heating Maintenance & Service Contracts (Wartung) Annual maintenance contracts for heating systems offered as flat-rate pauschal (lump-sum) pricing based on 90 minutes of labor plus travel. Spare parts such as maintenance kits are billed separately; unplanned additional work is documented and invoiced separately.
- Buderus Logaplus Paket GB182i-14kW RC310, 25L MAG, WW-Fühler Wall-mounted designer gas condensing unit for single, two, and multi-family houses with modulating burner (14.5–100%), aluminium heat exchanger with ALUplus surface coating, and integrated digital controller BC25. Includes 25L expansion vessel and hot water sensor.
- Buderus Logaplus Paket GB192i-15kW RC310, 25L MAG, WW Fühler High-tech wall-mounted gas condensing boiler with A+ energy efficiency, touchscreen display, and modulation range up to 1:10. Internet-ready and smart-home capable with integrated Web KM100 interface for smartphone control via the Buderus EasyControl app.
- Buderus Logaplus Paket GB172-14kW, G25, RC310 Floor-standing gas condensing boiler with modulating burner, speed-controlled high-efficiency pump, and digital boiler control. Standard utilization efficiency up to 109% with aluminium cast heat exchanger for year-round condensing operation.
- Buderus Logaplus Paket GB102S-16kW, G20, RC200 Compact floor-standing gas condensing boiler (under 400mm wide), low weight, with pre-mixed gas burner and speed-controlled combustion air fan. Compatible with Logamatic EMS plus control components and includes RC200 control unit.
Quantifiable outcome
- Up to 70% cost savings compared to traditional pipe replacement
- +4 more outcomes
Companies that use Holter
Customer profileNamed customers11 records
Segments4 records
Ideal customer profiles4 records
Holter technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature2 records
Holter partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered core and minor.
- VaillantcoreHolter GmbH is a partner company (Partnerunternehmen) of Vaillant, distributing and installing Vaillant heating products including heat pumps (aroTHERM series) and gas condensing boilers. The partnership provides access to Vaillant product lines, technical training, and co-branded marketing materials.
- ViessmanncoreHolter installs Viessmann heating products including Vitodens condensing boilers, Vitocrossal floor-standing boilers, Vitocal heat pumps, and solar thermal systems. Viessmann products feature prominently in the company's project portfolio and marketing materials.
- Buderus (Bosch)coreHolter is an authorized Buderus installer offering the full Buderus product range including GB182i, GB192i, GB172, and GB102S gas condensing units, control systems (Logamatic RC310, RC200), and system packages. Buderus products are sold through the Holter online shop.
- mehrwärmeminormehrwärme is a full-service contracting partner offering heating technology without high upfront investment through a contracting model. Holter provides installation services under this partnership.
Scale indicators5 records
Recent moves10 records
Expansion highlights6 records
Holter competitors and assessment
Company assessmentBroad incumbents
- Caverion Deutschland GmbH: German arm of Nordic building services group Caverion, delivering HVAC, plumbing, and technical facility services for commercial, industrial, and public-sector buildings. Comparable to Holter as a multi-service building equipment contractor across Germany, but with substantially larger scale and broader geographic coverage.
- GA-tec Gebäude- und Anlagentechnik GmbH: German HVAC, building services, and technical facility management group with multi-regional presence. Comparable to Holter as a German building equipment contractor offering heating, climate, and sanitary services, though at greater scale and broader geographic reach.
- ENGIE Deutschland GmbH: Major German subsidiary of ENGIE Group providing energy services, HVAC, building services, and technical facility management across Germany. Comparable to Holter as a large-scale HVAC and building services provider, though operating at vastly greater scale and with a much broader portfolio beyond Holter's SHK and pipe-rehabilitation niche.
- Gegenbauer Holding GmbH & Co. KG: Berlin-based German facility services and building services group providing HVAC, technical building management, and property services. Comparable to Holter as a building-services contractor serving commercial and residential customers in Germany, though with much broader geographic and service-line coverage.
- Wisag Gebäudetechnik: German facility and building services provider with strong HVAC, technical building management, and energy services offerings. Comparable to Holter as a German building services contractor serving industrial, commercial, and real-estate customers — though at significantly larger scale and broader portfolio.
Others
- Vaillant GmbH: Major German heating equipment manufacturer (heat pumps, gas condensing boilers) of which Holter is an official Partnerunternehmen. Comparable to Holter as a strategic counterpart in the heating value chain, though operating as an OEM rather than an installation contractor; relevant for understanding Holter's product ecosystem and partner dependencies.
- Stiebel Eltron GmbH: German heat pump and hot water equipment manufacturer whose sole-water (brine-water) heat pumps are part of Holter's heat pump installation portfolio. Comparable to Holter as a strategic OEM counterpart in the renewable heating transition, providing heat pump product supply rather than competing directly as an installer.
- Viessmann Group: Major German heating, heat pump, and solar thermal manufacturer that Holter is authorized to install. Comparable to Holter as a strategic counterpart in the heating equipment ecosystem, providing Holter with the Vitodens, Vitocrossal, and Vitocal product lines; relevant for understanding product-portfolio dependencies.
Direct peers
- SÜSS GmbH: German regional SHK (Sanitär-Heizung-Klima) contractor providing heating, sanitary, and climate services to residential and commercial customers. Comparable to Holter as a German SHK trade contractor offering the same core service mix, though typically focused on a different regional footprint.
- Hammann GmbH: German specialist contractor focused on trenchless pipe rehabilitation and pipe-lining services for drinking water and heating networks. Most directly comparable to Holter's HST pipe-rehabilitation offering, targeting the same property management and housing-association customer segment with similar trenchless interior coating methods.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks7 records
Key highlights7 records
Customer concentration
Holter social profiles
Digital presenceHolter financial estimates
Financial estimateRevenue estimate
Valuation estimate
Holter leadership team
Management profileNumber of profiles
Profiles3 records
Holter funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Holter M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Holter
What does Holter do?
Holter GmbH is a family-owned HVAC, plumbing, and pipe rehabilitation contractor founded in 1964, headquartered in Korschenbroich, Germany. The company installs and modernizes heating systems (gas/oil condensing boilers, heat pumps, solar thermal), sanitary and bathroom installations, ventilation and climate systems, and offers the proprietary HST trenchless pipe rehabilitation technology for drinking water and floor heating pipes. Operations span heating, sanitation, and climate installations regionally within ~30–50km of Korschenbroich, while pipe rehabilitation services are delivered nationwide across Germany and into neighboring countries.
Is Holter a public or private company?
Holter is a private company. It is classified as family owned and is currently operating.
When was Holter founded?
Holter was founded in 1964. It employs 1 to 10 people.
Where is Holter based?
Holter is headquartered in Korschenbroich, Germany, in the Europe region.
How does Holter make money?
Four revenue lines are on record. Installation and Construction Services are the primary driver. The others are maintenance and Service Contracts, pipe Rehabilitation (HST Procedure) and product Sales (Online Shop).
Who are Holter's main competitors?
Broad incumbents on record are Caverion Deutschland GmbH, GA-tec Gebäude- und Anlagentechnik GmbH, ENGIE Deutschland GmbH, Gegenbauer Holding GmbH & Co. KG and Wisag Gebäudetechnik. Others are Vaillant GmbH, Stiebel Eltron GmbH and Viessmann Group. Direct peers are SÜSS GmbH and Hammann GmbH.
Does Holter have an API?
No public API is recorded for Holter.
What industry is Holter in?
Holter's product category is Building Services — HVAC, Sanitary & Pipe Rehabilitation. Its primary akta.pro industry code is IMAFALAC, Plumbing & Pipefitting Contracting, with a secondary code of HSAOAHAH, Mini-Split / Ductless HVAC Service & Repair. Its NAICS code is 238220 and its SIC code is 5070.