The Thielmann Group

The Thielmann Group has been a trusted name for heating and cooling solutions in Southeastern Wisconsin for over 90 years. Their dedicated team provides top-quality residential and commercial installation, replacement, repair, and maintenance services. Known for their timely service, competitive pricing, attention to detail, and commitment to going the extra mile, their certified HVAC and IAQ technicians ensure customer comfort. Customers praise their professionalism and smooth process, from furnace repair to new installations. Recently, customers have been very satisfied with their experiences, with one technician going above and beyond on a plumbing concern, and others appreciating the quick service and quality work. They offer prompt responses, often providing next-day service, and handle projects efficiently. Customers also value the honesty of the technicians, who provide accurate assessments and cost-effective solutions. Whether replacing an old air conditioner or installing a new HVAC system, the company delivers great customer service and reliable results, making sure homes stay comfortable throughout the year. Recently, customers shared positive experiences with the team. One customer appreciated Nick for his professionalism and efficiency in reviewing the boiler and hydronic baseboards, putting them at ease that everything was working properly. Jacob A’s over 20 years of experience and quick work on a bad condenser motor earned high praise, as he ordered and installed parts the same day, restoring their AC rapidly. Customers also highlighted the excellent customer service from everyone they interacted with—sales, installers, and office staff—describing feeling more like family than just customers. Another customer commended Andy for being very helpful, thorough, and passionate about his work, as he took the time to walk through everything and answer questions. Overall, the company continues to be highly regarded for their quick, honest, and professional service, ensuring comfort and satisfaction for all clients.