HRV & ERV Systems
in Duluth, MN
In northern Minnesota, homes are built tight to keep the cold out — but that same tight construction can trap stale air, moisture, pollutants, and odors inside. Heat Recovery Ventilators (HRVs) and Energy Recovery Ventilators (ERVs) solve this problem by continuously exchanging stale indoor air for fresh outdoor air while recovering most of the energy you have already paid to heat or cool. Northern Sun Plumbing & Heating installs, repairs, and maintains HRV and ERV systems for homes throughout the Duluth area. These mechanical ventilation systems are especially important in newer, energy-efficient homes that are well-sealed against air leakage. Without controlled ventilation, moisture builds up inside the home during winter, leading to condensation on windows, mold growth, and poor indoor air quality. An HRV or ERV provides a constant supply of fresh, filtered air while recovering 70 to 80 percent or more of the energy from the outgoing air stream. HRVs transfer heat between the air streams, making them ideal for cold, dry climates like Duluth. ERVs transfer both heat and moisture, which can be beneficial in homes that struggle with excessive dryness in winter. We help you determine which type is right for your home based on your specific conditions. Minnesota building code requires mechanical ventilation in new construction, and an HRV or ERV is the most energy-efficient way to meet that requirement. For existing homes, adding an HRV or ERV is one of the best investments you can make in indoor air quality and comfort.
Why Choose Us
HRV Installation & Service
Heat Recovery Ventilators exchange stale indoor air for fresh outdoor air while recovering heat energy — ideal for Duluth's cold, dry winters.
ERV Installation & Service
Energy Recovery Ventilators transfer both heat and moisture between air streams, helping maintain comfortable humidity levels inside your home.
Balanced Ventilation
HRVs and ERVs provide balanced ventilation that brings in fresh air and exhausts stale air simultaneously, maintaining proper air pressure in your home.
Maintenance & Filter Service
Regular filter cleaning, core inspection, and system maintenance keep your HRV or ERV running efficiently and delivering clean, fresh air year-round.
What Sets Us Apart
Licensed Professionals
Every technician holds current Minnesota licenses and carries full insurance coverage.
15+ Years Experience
Backed by over 15 years of hands-on experience in Northern Minnesota's demanding climate.
Upfront Pricing
Clear, written estimates before work begins. No hidden fees or surprise charges.
24/7 Emergency Service
Plumbing and heating emergencies don't wait for business hours, and neither do we.
How It Works
Air Quality Assessment
We evaluate your home's ventilation needs, check for moisture issues, and determine whether an HRV or ERV is the better fit for your situation.
System Design
We design the ventilation system with proper duct routing, intake and exhaust locations, and capacity matched to your home's size and tightness.
Installation
Our technicians install the unit and ductwork, connect to your existing HVAC system when appropriate, and ensure proper airflow balance.
Commissioning & Training
We test airflow rates, verify proper operation, and teach you how to maintain the system including filter cleaning schedules and seasonal adjustments.
Benefits of Working With Us
Trusted by Duluth homeowners for reliable service, honest pricing, and work that lasts.
Same-Day Scheduling
We understand your time matters. Most non-emergency calls can be scheduled for same-day or next-day service.
Clean Job Sites
We treat your home with respect. Drop cloths, shoe covers, and thorough cleanup are standard on every visit.
Warranty on All Work
Every repair and installation comes with a workmanship warranty so you can have confidence in the job.
Local Knowledge
We know Duluth's unique challenges — from frozen pipes to aging infrastructure — and we build solutions that last.
Frequently Asked Questions
What is the difference between an HRV and an ERV?
Both exchange stale indoor air for fresh outdoor air while recovering energy. An HRV (Heat Recovery Ventilator) transfers only heat between the air streams. An ERV (Energy Recovery Ventilator) transfers both heat and moisture. In Duluth's cold, dry winter climate, an HRV is typically the better choice because it does not transfer moisture back into the incoming air. However, if your home tends to be excessively dry in winter, an ERV may help maintain more comfortable humidity levels.
Does my home need an HRV or ERV?
If your home was built or remodeled to modern energy codes, it is likely tight enough to benefit from mechanical ventilation. Signs that you need one include condensation on windows in winter, stuffy or stale-smelling air, persistent humidity issues, or allergy symptoms that worsen indoors. Minnesota building code requires mechanical ventilation in new construction, and an HRV or ERV is the most efficient way to meet that requirement.
How often do HRV and ERV filters need to be cleaned?
Most manufacturers recommend cleaning or replacing filters every one to three months during the heating season, and checking them at least quarterly year-round. The heat exchange core should be inspected and cleaned at least once a year. We include filter and core maintenance as part of our Home Care Program for members with HRV or ERV systems.
Can you add an HRV or ERV to an existing home?
Yes. While it is easiest to install during new construction, we regularly add HRV and ERV systems to existing homes. The unit can be installed in a basement, utility room, or attic, with dedicated ductwork routed to supply fresh air to living spaces and exhaust stale air from kitchens and bathrooms. We design the installation to work with your home's layout and existing HVAC system.
Do HRVs and ERVs save energy?
Yes. By recovering 70 to 80 percent or more of the energy from outgoing air, HRVs and ERVs provide fresh air ventilation at a fraction of the energy cost of simply opening a window. They also reduce the load on your furnace by pre-warming incoming air in winter. The energy savings help offset the cost of the system over time.
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Need HRV & ERV Systems?
Our experienced team is ready to help. Call us today or book a free estimate online.