Heating & HVAC
in Duluth, MN
Duluth winters demand a heating system you can count on. Whether your home runs on natural gas, propane, or electric, Northern Sun Plumbing & Heating installs, repairs, and maintains the full range of heating and cooling systems — furnaces, heat pumps, gas-fired boilers, mini splits, HRV and ERV ventilation, air quality equipment, and commercial HVAC. We know the local climate inside and out, and we design every solution to handle the coldest nights on Lake Superior. From furnace installation and forced air heat pumps to indoor air quality and commercial HVAC, our certified technicians deliver reliable service backed by honest pricing and a commitment to your comfort and safety.
Why Choose Northern Sun for Heating & HVAC
Furnace Installation & Repair
We install and repair all major furnace brands, ensuring reliable heat when temperatures drop below zero.
HVAC Maintenance
Regular tune-ups keep your system efficient, extend its lifespan, and help you avoid expensive breakdowns mid-winter.
Mini Split Systems
Ductless mini splits are perfect for additions, garages, or homes without existing ductwork — efficient and easy to install.
Natural Gas Service
We handle natural gas line installation, repair, and testing with the safety certifications this critical work requires.
Boiler Repair & Replacement
Hydronic and water-based heating systems serviced, repaired, and replaced. We work on residential boilers of all types.
Forced Air Heat Pumps
Ducted heat pump systems that heat and cool your entire home through existing ductwork — one efficient system for year-round comfort.
Gas-Fired Heating
Gas boilers, unit heaters, radiant floor systems, and gas piping — we service all gas-fired heating equipment for homes and businesses.
HRV & ERV Ventilation
Mechanical ventilation systems that bring fresh outdoor air into your home while recovering the energy from outgoing stale air.
Indoor Air Quality
Air filtration, UV germicidal systems, humidifiers, and dehumidifiers to keep your indoor air clean, healthy, and comfortable.
Geothermal Heating
Interested in geothermal? We partner with a trusted geothermal installer and coordinate the plumbing and HVAC connections for a complete system.
Our Heating & HVAC
Keep your home warm through every Duluth winter with expert furnace, HVAC, and mini split services.
How It Works
Assessment
We evaluate your current heating system, home layout, and comfort goals to understand exactly what you need.
Recommendation
You receive a clear recommendation with options at different price points, so you can choose what fits your budget and goals.
Installation or Repair
Our certified technicians complete the work efficiently, following all codes and manufacturer specifications.
Testing & Verification
We test the entire system, verify proper operation, and walk you through your new equipment before we leave.
Why Homeowners Trust Us
Trusted by Duluth homeowners for reliable service, honest pricing, and work that lasts.
Licensed Technicians
Every technician on our team holds current Minnesota licenses and ongoing training certifications. You get qualified professionals on every visit.
Honest Pricing
We provide detailed estimates before work begins and never surprise you with hidden fees. You approve the cost upfront — no exceptions.
Local Family Business
Northern Sun is a Duluth-based family operation, a service division of J&R Sundberg Construction. We live here, we work here, and our reputation matters to us.
Satisfaction Guaranteed
We stand behind every job. If something is not right, we come back and make it right — no questions asked, no runaround.
Frequently Asked
Questions
Have a question we haven't answered? Give us a call at (218) 491-3203 and we'll be happy to help.
What types of heating systems do you work on?
We service forced-air furnaces, forced air heat pumps, gas-fired boilers, hydronic and radiant floor heating systems, ductless mini splits, gas unit heaters, HRV and ERV ventilation systems, and indoor air quality equipment. Whether your home uses a traditional furnace, heat pump, or radiant floor heat, our team has the training and experience to keep it running right.
How often should I have my heating system maintained?
We recommend an annual tune-up before the heating season begins, ideally in early fall. Regular maintenance catches small problems before they turn into expensive repairs and keeps your system running at peak efficiency, which lowers your energy bills.
Do you handle emergency heating calls?
Yes. Losing heat in a Duluth winter is dangerous, and we treat no-heat calls as emergencies. Call us at (218) 491-3203 any time — day or night — and we will dispatch a technician as quickly as possible to restore your heat.
What is the most efficient heating system for Duluth?
High-efficiency furnaces rated 95% AFUE or higher are the most popular choice for our climate. Forced air heat pumps and ductless mini splits offer excellent efficiency and can serve as primary or supplemental heating. We help you weigh the options — including dual-fuel heat pump and gas furnace combinations — based on your home and budget.
Can you help improve my home heating efficiency?
Absolutely. Beyond installing high-efficiency equipment, we check ductwork for leaks, verify proper insulation around pipes, and make sure your thermostat is calibrated correctly. These small steps can make a noticeable difference on your energy bills.
Do you install geothermal heating systems?
We do not install geothermal systems directly, but we work closely with a trusted geothermal partner. Call us at (218) 491-3203 and we will connect you with the right team for your project.
Need Heating & HVAC?
Our experienced team is ready to help. Call us today or book a free estimate online.