The Building Envelope refers to the physical separator between the conditioned interior of a building and the unconditioned exterior. This includes the walls, roof, windows, and foundation of your home. A tight building envelope is essential for your Single-Zone or Multi-Zone system to operate at peak efficiency. If the envelope has leaks, your "Load Calculation" will be higher, requiring a larger system to maintain comfort. Improving your insulation and sealing windows is a key part of "Decarbonization" and reducing your "Carbon Footprint." During "New Construction," builders focus on the envelope to meet modern energy codes. We provide Accessories like wall sleeves and line set covers to help maintain the integrity of this envelope at the point of HVAC entry. A high-efficiency Sierra Smart unit paired with a tight envelope results in the lowest possible utility bills. It is the first thing an HVAC Contractor evaluates during a "Manual J" assessment.