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50 Years
experience
Emergency
services
Your Trusted HVAC Partner in Milwaukee, WI
At RJ Heating & Air Conditioning, we are a family-owned business rooted in Milwaukee since 1976. Our three-generation legacy began with Julius Hopfenspergers grandfather in Marinette, evolving into a trusted local HVAC provider under Juliuss leadership. We specialize in heating, cooling, and indoor air quality solutions for residential and light commercial clients, combining technical expertise with personalized service.

Our Comfort First Membership offers cost-saving benefits, including maintenance, 25% off installations, and zero hidden fees. Recognized as Milwaukees top HVAC professionals in 2021 and 2024 by Expertise.com, we prioritize reliability, affordability, and customer satisfaction. With 45 years of local experience, we deliver 24/7 emergency service and tailored solutions to ensure year-round comfort.
Services
Furnace Installation Air Conditioner Repair Boiler Maintenance Ductless Split Systems Indoor Air Quality UV Light Installation Heat Pump Repair Furnace Maintenance Emergency HVAC Service Cooling System Tune-Ups
Details
  • Year established: 1976
Highlights and features
  • We offer 45 years of local HVAC expertise and family-owned service.
  • Our Comfort First Membership provides predictable costs and exclusive discounts.
  • 24/7 emergency service ensures immediate support during critical failures.
  • 100% satisfaction guarantee on all installations and repairs.
  • Award-winning service recognized by Expertise.com in 2021 and 2024.
What people say
Award-winning service 24/7 emergency support Affordable solutions Family-owned expertise Satisfaction guarantee
Services
Furnace Installation
Professional furnace installation ensures efficient heating for homes and businesses. Our certified technicians handle all brands and models, prioritizing energy efficiency and comfort. Backed by a 100% satisfaction guarantee.
Air Conditioner Repair
Prompt air conditioner repairs minimize downtime during peak summer months. We diagnose and fix issues like refrigerant leaks, compressor failures, and thermostat malfunctions. Available 24/7 for emergencies.
Boiler Maintenance
Regular boiler maintenance extends system lifespan and prevents breakdowns. Our technicians inspect, clean, and optimize components to ensure safe, efficient operation year-round.
Indoor Air Quality
Improve respiratory health with IAQ solutions like air purifiers, humidifiers, and UV lights. We assess and enhance air quality to reduce allergens and pollutants in your space.
Ductless Split Systems
Ductless systems provide zoned heating and cooling without traditional ductwork. Ideal for additions or homes with limited space, offering energy-efficient temperature control for any room.
People
Julius Hopfensperger
Owner
Third-generation HVAC leader with 45+ years of Milwaukee-area experience. Holds mathematics degree and oversees operations, ensuring customer-centric service and technical excellence aligned with family values.
Questions
What is the Comfort First Membership?
A $19.99/month program offering maintenance, 25% off installations, and zero hidden fees for HVAC systems.
Do you offer emergency HVAC service?
Yes, we provide 24/7 emergency service for urgent heating and cooling issues.
Which areas do you serve?
We serve Milwaukee and Ozaukee counties, including Brookfield and surrounding communities.
Are financing options available?
Yes, we offer financing for HVAC installations and major repairs. Contact us for details.
What certifications do your technicians hold?
Our team includes CFC-certified technicians trained in all major HVAC systems and safety protocols.