When Minnesota’s winter weather hits hard, homeowners need a dependable heating solution that delivers consistent warmth, energy efficiency, and long-lasting performance. For those with hydronic heating systems or looking to upgrade their existing boiler, the Lennox® GWB9-IH Boiler offers a smart, reliable option designed for both comfort and savings.
At Marsh Heating & Air Conditioning, we understand the importance of staying warm without overpaying on energy bills. That’s why we proudly recommend Lennox heating products like the GWB9-IH, engineered for superior performance and peace of mind.
What Is the Lennox GWB9-IH Boiler?
The GWB9-IH Boiler is a high-efficiency, gas-fired water boiler from Lennox. Designed for homes with radiant or hydronic heating systems, this unit efficiently heats water and circulates it through your home’s radiators or underfloor tubing to provide clean, comfortable heat.
Unlike forced-air systems, boilers offer a quiet, dust-free way to heat your home. The GWB9-IH delivers on that promise—and more—with modern technology and high-quality construction.
Key Features & Benefits
✅ Up to 90% AFUE Efficiency
AFUE (Annual Fuel Utilization Efficiency) measures how much fuel a system converts into usable heat. The GWB9-IH boasts up to 90% AFUE, meaning 90 cents of every dollar spent on fuel goes directly toward heating your home. That’s a significant improvement over older boilers, which often waste 30% or more of the fuel they consume.
✅ Cast-Iron Heat Exchanger for Longevity
This boiler is built to last. Its cast-iron heat exchanger is known for durability and heat retention, ensuring steady performance year after year. It’s a perfect match for Minnesota’s harsh winters, when reliable heat is a must.
✅ Electronic Ignition for Fuel Savings
Unlike outdated systems that keep a pilot light burning around the clock, the GWB9-IH uses an electronic ignition system. This feature lights the burners only when needed—saving energy and reducing fuel waste.
✅ Compact Design
Worried about space? The GWB9-IH is designed with a compact footprint, making it ideal for homes with limited mechanical room space or smaller basements. Despite its size, it doesn’t compromise on performance.
✅ Sealed Combustion System
The sealed combustion system draws air from outside rather than from inside your home. This improves indoor air quality and enhances energy efficiency, particularly in tightly insulated or newer homes.
Is a Boiler Right for Your Home?
Boilers offer several advantages over traditional forced-air systems:
Even, radiant heat that eliminates drafts and cold spots
Quieter operation, with no noisy fans or blowing air
Better air quality, with no dust or allergens being circulated
If your home already uses baseboard heating or in-floor radiant heat, upgrading to the GWB9-IH is a seamless improvement that enhances both comfort and efficiency.
Why Choose Marsh Heating & Air Conditioning?
At Marsh Heating & Air Conditioning, we’ve been helping Twin Cities homeowners stay warm and save energy for over 50 years. Our expert technicians are trained in boiler installation, maintenance, and repair, ensuring your Lennox GWB9-IH Boiler is installed correctly and built to perform.
When you work with us, you can expect:
Personalized system recommendations tailored to your home’s needs
Professional installation that meets all safety and code requirements
Ongoing maintenance plans to keep your system running efficiently
Ready to Upgrade Your Home Heating?
Don’t wait until the next cold snap to think about your boiler. The Lennox GWB9-IH Boiler is a smart investment for homeowners seeking dependable, energy-efficient heat with the added benefit of long-term savings.
📞 Call Marsh Heating & Air Conditioning at 763.536.0667 or visit MarshHeating.com to schedule a consultation and find out if the GWB9-IH is the right fit for your home.
Let us help you stay warm, comfortable, and energy-smart—all season long.