Mikron House Systems are designed to meet energy standards and include several residential window systems. Mikron R1-100 has a beveled frame design and perimeter mull groove. R2-9200 (pictured) is appropriate for new construction and renovation and has a 7/8-inch exterior-glazed glazing pocket. R2-10000 is designed for colder climates while the R1-6450 window system is a lightweight system appropriate for new construction.