Our Product Efficiency

Energy Star logo

Made in the North, for the North

Northern Window products are recognized by ENERGY STAR® as some of the most energy efficient windows available in Canada. By installing our products, you will reduce energy costs while making your home more comfortable.

Visit us today to learn more about the efficiency of our windows and doors.

Learn More about ENERGY STAR®

Canada's Climate Zones

Energy Star Climate zone map

Fig. 1: Canada's ENERGY STAR® rating zones

The ENERGY STAR® program divides Canada into four geographic zones distinguished by the Letter A, B, C and D (see Fig. 1). By choosing windows that meet the ENERGY STAR® performance level for your region, you will reduce energy costs and through increased energy efficiency, provide improved comfort levels in your home year round.

Northern Window & Door products are designed and built right here in Thunder Bay to meet or exceed Zone C requirements.

  • Zone D: > 8000 Heating Degree Days
  • Zone C: > 5500 to <= 8000 Heating Degree Days
  • Zone B: > 3500 to <= 5500 Heating Degree Days
  • Zone A: <= 3500 Heating Degree Days
Learn More about Canada's Climate Zones