About EPS
Energy Panel Structures

Energy Panel Structures was established in 1981 as a wholly owned subsidiary of the MacArthur Company of St. Paul, MN.

MacArthur Company, an 80 year old private firm with a 4A1 Dun & Bradstreet rating, has 20 warehouses in the western United States specializing in the distribution of roofing and insulation products.

Energy Panel Structures was started in Albert Lea, MN. After three expansions the company moved in 1988 to Graettinger, IA to a new 40,000 square foot plant designed specifically for the manufacture of insulated panels. Since the move to Graettinger, EPS has expanded three times, adding 3,000 square feet for a door manufacturing facility and another 7,000 square feet to increase the finished goods storage capacity. Our latest expansion of 30,000 square feet to our main manufacturing space brings the total facility to 110,000 square feet on an 8-acre tract.

The company was originally begun to manufacture insulated wall panels for the agricultural market. Since that time, EPS has diversified into the commercial/industrial markets.

• Structural insulated panel (Solid Core) buildings feature foam core wall panels and wood truss systems for small and medium size agricultural, commercial and industrial buildings.
• Post frame packages for commercial and agricultural use
• Commercial industrial building packages and panelized products
• Complete dairy facilities
• Equestrian arenas and complete stable packages
• Steel frame building packages can utilize Energy-Lok steel faced EPS foam core panels
• Insulated panels for both new construction and retrofit projects
• Cold storage panel systems and walk-in freezers
• Small exterior cooler and freezer building packages
• Residential

Our EPS specialty manufactured products include:

• DURA DOORS: Durable insulated walk doors - one of the best around
• Sliding vent doors
• Thin wall division walls
• Pop-up ceiling systems

Energy Panel Structures will supply the complete building package or individual panels. Most of our sales are of complete packages. Energy Panel Structures can fabricate and/or manufacture all components necessary for your building packages.