Custom Ductwork

Custom Ductwork Services in Willmar, MN & Surrounding Areas

Your heating and cooling system is only as good as the ductwork that carries the air. Poorly designed or leaky ducts can waste energy, create hot and cold spots, and strain your HVAC equipment. At Magnuson Sheet Metal, we’ve specialized in custom sheet metal fabrication and ductwork services since 1978—helping homes and businesses in Willmar achieve maximum comfort and efficiency.

Why Custom Ductwork Matters

• Improved Efficiency – Custom ducts are built to fit your system and space, reducing air leaks and wasted energy.
• Better Comfort – Even airflow throughout your home or building means no more hot or cold spots.
• Longer System Life – Properly sized ducts reduce strain on your furnace, AC, or heat pump.
• Healthier Air Quality – Airtight ductwork helps keep dust, allergens, and pollutants out of your airflow.
• Tailored Solutions – Every property is unique; custom fabrication ensures your system is designed to perform at its best.

Our Custom Ductwork Services

New Ductwork Installation

Building a new home or business? We design and fabricate duct systems that integrate seamlessly with your HVAC equipment.

Ductwork Replacement & Upgrades

Old, leaky ducts waste energy and reduce comfort. We replace outdated ductwork with custom-fabricated solutions built to last.

Duct Sealing & Modifications

If your current system needs adjustments, we can seal leaks, resize sections, or reconfigure duct runs to improve efficiency.