NatHERS will change when improved building air tightness is treated as a valid energy savings strategy along with other envelope measures. A key distinction is that assumptions made in the assessment must be verified in real life by a blower door test. There are major opportunities here, but also risks. Learn more about how the process will work, what a test involves and how much it costs. Importantly, learn how to take reasonable projections and make them a reality. Hear a special perspective on the U.K.’s experience with the same transition – what worked for the industry and what didn’t. 

Who should attend and why:

NatHERS assessors, energy consultants, air tightness testers, and builders should attend so they understand the coming opportunity for cost-effective improvements in NatHERS assessments and real-world outcomes. 

Learning Outcomes:

• Learn about the impact of air tightness on NatHERS star ratings as an untapped opportunity.
• Learn how to make reasonable assumptions without over-promising. 
• Learn simple design and construction strategies for cost-effective gains in air tightness. 
• Learn requirements in the NCC related to air tightness and ventilation.
• Learn valuable lessons from the U.K.’s experience with this same transition in regulation.