The Thielmann Group

What The Thielmann Group does

Thielmann Heating, Cooling & Plumbing, operating under The Thielmann Group, is a family-owned HVAC and plumbing services provider headquartered in New Berlin, Wisconsin and serving the Southeastern Wisconsin region. Founded in 1929, the company operates six service locations (New Berlin, Slinger, Oak Creek, Burlington, Waterford, Mequon) and delivers residential and commercial heating, air conditioning, indoor air quality, and plumbing services through employed, NATE-certified, Wisconsin-licensed technicians. Its core technology stack is standard HVAC equipment (gas, oil, and electric furnaces, boilers, heat pumps, central AC, ductless mini-splits, packaged units) sourced from major OEMs rather than proprietary hardware.

The business model is predominantly transactional professional services — repair, installation, replacement, and one-time plumbing work — supplemented by an annual recurring Care-Free Maintenance & Energy Savings Program that bundles premium tune-ups, water quality analysis, priority scheduling, and a 15% repair discount. Pricing is quote-based with upfront transparent pricing and free replacement estimates; third-party 0% financing is offered to enable higher-ticket installs. Customers are reached direct-to-consumer via the company website, online scheduling, phone, and trust signals including an A+ BBB rating, 3,000+ verified reviews, and a Lennox Feel the Love OEM partnership.

Two primary customer segments are addressed: residential homeowners across the Southeast Wisconsin corridor (Milwaukee, Racine, Kenosha, Oak Creek, New Berlin, Hartford, Burlington, Waterford, Wauwatosa, Cedarburg, Menomonee Falls) seeking heating, cooling, plumbing, and air-quality solutions, and commercial properties (offices, retail, warehouses, industrial facilities) needing rooftop units, packaged systems, commercial boilers, and preventative maintenance contracts. The company's go-to-market is direct field service via company-employed technicians, with same-day and 24/7 emergency response as a primary differentiation lever.

Name

The Thielmann Group

Legal name

Thielmann Heating, Cooling & Plumbing

Website

https://thielmannheating.com

Company type

Private

Founded year

1929

Operating status

Operating

Headcount range

1–10 employees

Short description

Thielmann Heating, Cooling & Plumbing is a family-owned HVAC and plumbing services company founded in 1929, serving residential and commercial customers across Southeastern Wisconsin from six service locations. It offers heating, cooling, plumbing, indoor air quality, and recurring maintenance services delivered by NATE-certified, Wisconsin-licensed technicians.

Ownership category

akta.pro rank

Product category

HVAC and Plumbing Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (23822), Plumbing, Heating, and Air-Conditioning Contractors (238220)

SIC

Services-Miscellaneous Repair Services (7600)

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industries

HVAC System Replacement & Change-Outs (HSAOAGAB), Ventilation System Installation & Repair (Bath/Kitchen Fans, ERV/HRV) (HSAOAIAF), HVAC Air Filtration & Air Purifier Installation (HSAOAIAC), HVAC System Cleaning & Coil Service (Indoor Units) (HSAOAHAK)

Keywords

• HVAC services
• Heating installation
• Air conditioning
• Plumbing services
• Indoor air quality

Headquarters

HQ city

Wisconsin Rapids

HQ country

United States

HQ region

North America

Offices6 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Supply Chain, Others

Revenue model

1. HVAC Repair Services: On-demand repair services for heating and cooling systems including furnaces, boilers, heat pumps, and air conditioners. Revenue is transaction-based, generated per service call with upfront pricing.
2. Installation and Replacement: New HVAC system installation and replacement services for residential and commercial properties. One-time transaction revenue with options for financing.
3. Maintenance Membership Plans: Annual heating, cooling and plumbing maintenance membership plan (Care-Free Maintenance & Energy Savings Program) that includes premium tuneups, professional equipment cleaning, water quality analysis, and annual plumbing inspection. Generates recurring subscription revenue with priority scheduling and 15% discount on repairs for members.
4. Financing Services: Partnership with financing partners to offer payment plans for installations and replacements, including 0% financing options. While not direct revenue, financing enables higher-value transactions.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

The Thielmann Group provides residential and commercial HVAC and plumbing services across Southeastern Wisconsin, including installation, repair, maintenance, and replacement of heating (furnaces, boilers, heat pumps), air conditioning (central AC, ductless mini-splits), indoor air quality systems (humidifiers, dehumidifiers, air purification, duct cleaning), and plumbing (water heaters, sump pumps, water conditioning). The company also offers a recurring annual maintenance membership (Care-Free Maintenance & Energy Savings Program) and third-party financing options for higher-value system replacements.

Product overview

Thielmann Heating, Cooling & Plumbing is a family-owned HVAC and plumbing service company serving Southeastern Wisconsin since 1929. The company operates as a services-based business offering a comprehensive portfolio of heating, cooling, air quality, and plumbing solutions rather than a software product platform. The core service offerings include: Heating Services (furnaces, boilers, heat pumps, packaged units), Air Conditioning Services (central AC, ductless mini-splits, heat pumps), Indoor Air Quality Services (air purification, humidifiers, dehumidifiers, duct cleaning), Plumbing Services, and Commercial HVAC Services. These core services are supported by add-on offerings including the Care-Free Maintenance & Energy Savings Program (annual tune-ups and priority service membership) and Financing Services. The company also provides specialized sub-products such as boiler services, furnace services, heat pump services, ductless mini-split installation, and air duct cleaning. The business model centers on providing installation, repair, maintenance, and replacement services rather than selling physical products, with a focus on residential and commercial customers throughout the Southeastern Wisconsin region.

Differentiator

Problem solved

Functional benefit

Products and services

• Heating Services Comprehensive heating system services including installation, repair, maintenance, and replacement for furnaces (gas, oil, electric), heat pumps, boilers, and packaged units, available to residential and commercial properties in Southeastern Wisconsin.
• Air Conditioning Services Full-service air conditioning solutions including installation, replacement, repair, and maintenance for central AC units, ductless mini-splits, and heat pumps for homes and businesses.
• Indoor Air Quality Services Air quality enhancement services including air purification systems, humidity control (humidifiers and dehumidifiers), and comprehensive duct cleaning and repair to improve indoor air quality for residential and commercial properties.
• Plumbing Services Complete plumbing installation and repair services for water heaters, toilets, faucets, garbage disposals, water conditioning, sump pumps, pipe repairs, and hose bib services for residential and commercial customers.
• Commercial HVAC Services Commercial heating and cooling services for offices, retail spaces, warehouses, and industrial facilities including rooftop units, packaged HVAC systems, commercial boilers, and multi-zone solutions.
• Care-Free Maintenance & Energy Savings Program Annual premium tune-ups, professional equipment cleaning, water quality analysis, priority scheduling, and 15% discount on repairs to maintain manufacturer warranty requirements and extend equipment lifespan for members.
• Boiler Services Specialized boiler services including installation, replacement, repair, and maintenance for gas, electric, steam, condensing, and hot water boilers with same-day emergency services available.
• Furnace Services Furnace repair, installation, and replacement services for gas, oil, electric, propane, dual fuel, and multi-stage furnaces with same-day service and upfront pricing.
• Heat Pump Services Heat pump installation, replacement, repair, and maintenance services offering both heating and cooling capabilities with energy efficiency benefits for Wisconsin's climate.
• Ductless Mini-Split Installation & Repair Ductless mini-split systems providing zoned heating and cooling solutions for homes without existing ductwork, older homes, additions, or specific room temperature control.
• Air Duct Cleaning Services Professional air duct and ductwork cleaning services including inspection, debris removal, and system optimization to improve HVAC efficiency and indoor air quality.

Quantifiable outcome

• Heat pumps can reduce home's carbon emissions by up to 50%
• +4 more outcomes

Named customers4 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Lennox InternationalcoreTechnology or IntegrationOfficial Lennox Feel the Love partner providing installation, repair, and maintenance services for Lennox HVAC products. This partnership provides access to manufacturer support, training, and exclusive promotional programs. The partnership enhances credibility and ensures genuine parts availability.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Bassett Mechanical: Wisconsin-based mechanical contractor providing HVAC, plumbing, and building services for commercial and industrial customers. Directly comparable full-service mechanical contractor footprint within the same regional market as Thielmann.
• J.F. Ahern Co. Fond du Lac, Wisconsin mechanical contractor offering HVAC, plumbing, fire protection, and building services. Comparable multi-trade mechanical services operator in the Wisconsin market with a similar customer mix.
• All Comfort Services: Wisconsin residential HVAC and plumbing service company providing heating, cooling, and plumbing installation and repair. Direct regional competitor with overlapping service portfolio and target customer base.
• Complete Comfort Heating, Cooling & Plumbing: Wisconsin-based residential HVAC and plumbing service contractor. Comparable full-service residential heating and cooling operator competing in overlapping Wisconsin metros.

Broad incumbents

• Trane Technologies: Global HVAC equipment manufacturer (Trane, American Standard) operating a national dealer and service network. Comparable as the upstream brand whose products Thielmann installs, services, and competes against via local dealer partners.
• Carrier Global: Major HVAC manufacturer (Carrier, Bryant, Payne) with an extensive North American dealer/service network. Comparable as a brand whose products Thielmann installs and services, and whose dealer network competes for the same residential and commercial customers.
• Lennox International: Global HVAC manufacturer with residential and commercial product lines. Comparable as Thielmann's named Feel the Love manufacturer partner, whose dealer programs and national brand presence shape Thielmann's competitive environment.

Emerging players

• One Hour Heating & Air Conditioning: National residential HVAC service franchise with growing Midwest presence. Comparable as a scaling service-delivery brand competing for the same residential replacement and repair customers in Wisconsin metros.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/thielmann_son

Revenue estimate

Valuation estimate

Number of profiles

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 The Thielmann Group