This image shows a building with more exhaust air than supply air.
This building contains a balanced system.
This image shows a building with more supply air than exhaust air.
This image represents a plumbing layout that can be used to help determine if WaterSense criteria is met.
Source: U.S. Department of Energy
Commercial Building Energy Code Adoption Map
Core: Smaller pipes to nearby fixtures. Requires thoughtful design of plumbing fixtures. Saves hot water with smaller, shorter pipes.
Demand Re-circulation Plumbing Layout
This is an example of an NFRC label.
Source: Building Media, Inc.
This image shows the major components of an HVAC system. The outdoor compressor is purple, the return ducts are blue, the supply ducts are red, and the the thermostat is orange.