What is a COOLHOUSE? A COOLHOUSE is an architecturally designed, low energy, premium, modular home. A COOLHOUSE combines the best passive house or low energy technologies from overseas with local award-winning design and green home construction. Why build a COOLHOUSE? Health, comfort and peace of mind. Because a COOLHOUSE is well sealed, has superior insulation and far exceeds NZ’s building code in every area – future proof your home! Read more.