Thielmann & Son Heating and Cooling: Hartford WI's Trusted HVAC Experts

For over 90 years, Thielmann & Son Heating and Cooling has been the reliable choice for home and business comfort in Southeastern Wisconsin. Based in Hartford WI, this family-run company handles everything from sudden furnace breakdowns on a cold Wisconsin night to planning a new, efficient air conditioning system for the summer. Their team of background-checked, NATE-certified technicians is ready for both scheduled maintenance and emergency repairs, providing service to residential and commercial customers across the region.

Business Overview

Thielmann & Son Heating and Cooling operates from several locations, including Hartford WI, to serve the wider community. They understand the specific heating and cooling demands of Wisconsin's climate, with its hot, humid summers and deep-freeze winters. The company is fully licensed and insured, offering free estimates and flexible financing to make comfort upgrades accessible. Whether it's a historic home in Hartford or a modern office building in Milwaukee, their technicians have the knowledge to get the job done right.

Key Services

The company provides a full range of heating and cooling solutions tailored to local needs.

• HVAC Installation & Replacement: Expert installation of new furnaces, air conditioners, heat pumps, and complete systems for better efficiency and comfort.
• HVAC System Repair: Fast, dependable repair services for all makes and models, focusing on getting your heat or AC back on quickly.
• HVAC System Maintenance: Seasonal tune-ups and maintenance plans to prevent costly breakdowns and keep systems running smoothly year-round.
• Indoor Air Quality Solutions: Services to improve the air inside your home or business, which is especially valuable during Wisconsin's high-pollen seasons.

Areas Served

Thielmann & Son Heating and Cooling proudly serves a wide area of Southeastern Wisconsin. Their service area includes Milwaukee, Waukesha, Wauwatosa, Brookfield, Menomonee Falls, West Bend, Watertown, Germantown, Beaver Dam, Oconomowoc, Hartford, and many more communities. With deep roots in the region, their technicians are familiar with the common HVAC setups in local ranch homes, older farmhouses, and commercial buildings, allowing for efficient and knowledgeable service no matter your address.

Company History

The story began in 1929 when John Thielmann started the business servicing boilers and oil furnaces. His son Walter soon joined him, and together they grew the company, eventually becoming local representatives for Lennox. The tradition continued with Walter's sons, Paul and Tom, who literally grew up in the shop. Paul took over in 1969 and introduced air conditioning to their services, while Tom contributed as a technician and office manager. This long history isn't just a date on a page; it's a legacy of hands-on, family commitment to keeping Southeast Wisconsin comfortable.

Leadership

Though the original founders have passed the torch, the business remains steeped in family values and local expertise. The leadership maintains the practical, customer-focused approach established by John and Walter Thielmann. With physical locations in New Berlin, Hartford, Burlington, and Menomonee Falls, the company's presence is woven into the fabric of the communities it serves. Their involvement is practical—knowing the neighborhoods, understanding local utility challenges, and being a dependable local employer.

Specialties & Highlights

• Since 1929: Nearly a century of continuous, family-operated service in Southeast Wisconsin.
• NATE-Certified Technicians: Every technician is highly trained and certified, ensuring expert-level repairs and installations.
• Free Estimates & Financing: Transparent pricing and payment options to help homeowners and business owners manage costs.
• Residential & Commercial Focus: Equipped to handle everything from a single-family home in Hartford WI to larger commercial projects.
• Full-Service Provider: From installation and repair to maintenance and air quality, they are a true one-stop shop.

Why Locals Choose Thielmann & Son

Homeowners and business managers in Hartford WI and the surrounding counties return to Thielmann & Son Heating and Cooling for a simple reason: proven reliability. When your furnace quits in January, you need a company that will answer the phone and has the parts and knowledge to fix it. Their long-standing presence means they've likely serviced your neighbor's home or a local shop you know. They combine old-fashioned dedication with modern training and technology, offering peace of mind that comes from 90+ years of making Southeast Wisconsin homes and workplaces comfortable. For heating and cooling you can count on, Thielmann & Son in Hartford WI remains a trusted name.