Cost – Free at EcoFest with Trade-in or $10-20
Savings – $50/year for family of 4 
Installation time – 5 minutes
Materials/Tools Needed – Teflon tape, shower head.
Maintenance – None
For maximum water efficiency, select a shower head with a flow rate of less than 2.5 gallons per minute (gpm).
There are two basic types of low-flow showerheads: aerating and laminar-flow. Aerating showerheads mix air with water, forming a misty spray. Laminar-flow showerheads form individual streams of water. If you live in a humid climate, you might want to use a laminar-flow showerhead because it won't create as much steam and moisture as an aerating one.