Windows, Single Hung Window Type, Metal, Picture Window Type, Double Hung Window Type, and Wood The supplied airtight joinery had a standard R value of 1.66, which is more than 6
times the minimum NZBC requirement. Surprisingly it reduced the overall heating demand of the home by approximately 50%.  Photo 12 of 16 in Twin Peak House by Daniel Friedrich

Twin Peak House

12 of 16

The supplied airtight joinery had a standard R value of 1.66, which is more than 6
times the minimum NZBC requirement. Surprisingly it reduced the overall heating demand of the home by approximately 50%.