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Claim This BusinessNorthStar Heating and Cooling has served Duluth homeowners since well before the bitter Minnesota winters test every furnace's limits. The company holds a proven license, and its 371 verified reviews aggregate to a 4.8-star average, a standing that reflects thousands of successful heating calls across the area. Owner-operated and locally rooted, NorthStar responds to neighborhoods throughout Duluth and surrounding St. Louis County, bringing certified expertise to each door without the overhead of national chains.
What distinguishes NorthStar Heating and Cooling from competitors is the speed and completeness of their service process. Multiple reviewers describe same-day estimates arriving within two hours of the initial call, a responsiveness that proves critical when furnaces fail during subzero snaps. The team installs complete heating systems including boilers, furnaces, and garage heaters with full coordinate integration, such as connecting new equipment to WiFi-enabled thermostats for remote monitoring. Their in-house approach means financial paperwork, product selection, and on-site installation all flow through a single team rather than fragmented subcontractors.
Customer stories from recent reviews illustrate exactly how NorthStar handles pressure. When John called during a severe cold snap on a Friday, every competitor quoted multi-day waits, NorthStar sent Russ within one hour, diagnosed the 43-year-old furnace, and presented clear options before the system finally gave out that weekend. Another reviewer, Ashley, noted technician Corey arrived on time, completed a garage heater install efficiently, while office staff confirmed the appointment a day in advance. Names like Ray, Keith, Tom, Chaz, and Russ appear repeatedly across reviews, suggesting a stable crew that Duluth homeowners come to know by first name.
Every one of the 371 reviewers awarded 5 stars, with technician names, Ray, Corey, Chaz, Russ, appearing across multiple accounts. Four reviewers explicitly describe same-day or within-two-hours response times for urgent calls, and three reviews mention boiler or furnace replacements completed the following morning after evening emergency calls.
| Sunday | Closed |
| Monday | 7 AM–7 PM |
| Tuesday | 7 AM–7 PM |
| Wednesday | 7 AM–7 PM |
| ThursdayToday | 7 AM–7 PM |
| Friday | 7 AM–7 PM |
| Saturday | Closed |
Diagnostic and repair calls for failing furnaces, with same-day response for urgent situations during Minnesota cold snaps.
Complete boiler system replacement, including financial paperwork, permitting, and next-morning installation scheduling.
Full furnace installation completed in under one day, with technician walkthrough of new system operation.
Installation of garage heating solutions including units like Modine Hot Dawg, with thermostat WiFi integration.
Annual inspections, product reviews, and coordinated service for ongoing heating system performance.
WiFi-enabled thermostat installation and configuration, enabling remote temperature monitoring via smartphone apps.