Houses are More Efficient

• Over 1 million houses have been rated
• Codes have changed
• Windows are better and bigger
• Furnaces are better
• Increased interest in air conditioning

Houses Have Changed

• 50% is multi-family
• Houses are taller and thinner
• More glass
  
• More plumbing, lights & appliances

This Impacts:

• Expectations
• Air tightness
• Ventilation
• The heating / cooling mix
• The sensible / latent mix