Bathroom Energy Tips

Most bathroom energy use comes from one source: hot water. Heating water for showers, baths, and sink use accounts for a significant portion of home energy use. The good news is that small changes in habits can reduce this without sacrificing comfort.

Shower Efficiency

Shower Length

Showers are typically the largest hot water use in the bathroom:

• A 10-minute shower uses considerably more hot water than a 5-minute shower
• Even reducing by a few minutes makes a difference
• A timer can help you track time
• Turn water off while lathering if you're comfortable doing so

Shower Temperature

• Water doesn't need to be scalding to feel warm and comfortable
• Slightly cooler water still provides a satisfying shower
• End with cooler water—feels refreshing and uses less energy

Efficient Showerheads

Low-flow showerheads use less water while maintaining good pressure:

• Modern low-flow heads don't feel restrictive
• Easy to install—often screw on by hand
• Renters can keep the original and swap back when moving
• Aerating and laminar-flow designs feel different—try before committing

Sink and Faucet

Hot Water at the Sink

• For quick hand washing, cold water cleans just as effectively
• By the time hot water reaches the tap, you may be done anyway
• Use hot water intentionally for specific tasks, not by default

Fix Leaks Promptly

A dripping faucet wastes water continuously:

• Hot water leaks waste energy as well as water
• Report leaks to landlord immediately
• A slow drip adds up to significant waste over time

Faucet Aerators

Like low-flow showerheads, aerators reduce water use:

• Inexpensive and easy to install
• Add air to the water stream, maintaining perceived pressure
• Particularly effective for bathroom sinks

Bathtub

Baths generally use more hot water than showers:

• A full bath uses considerably more water than a typical shower
• Partial fills still provide a relaxing experience
• Consider baths as occasional treats rather than daily routine
• When bathing, fill only as much as needed

Exhaust Fan

Purpose

Bathroom exhaust fans serve important functions:

• Remove excess moisture (preventing mold)
• Improve air quality
• Clear fog and odors

Efficient Use

• Run during and briefly after showering (10-15 minutes)
• Don't leave running for hours
• Timer switches can automate shutoff
• In winter, extended use exhausts heated air

Lighting and Heating

Bathroom Lighting

• Switch to LED bulbs if not already done
• Turn off lights when leaving
• Consider motion-sensor or timer switches

Bathroom Heating

Some bathrooms have separate heaters:

• Use only when needed, not continuously
• Heat lamps are meant for brief use during/after bathing
• Close the door to retain heat while in use

Water Heater

You may or may not have access to your water heater in an apartment:

If You Have Access

• Check the temperature setting—120°F (49°C) is sufficient for most needs
• Higher settings waste energy and increase scalding risk
• Insulating the tank and pipes helps (if permitted)

If You Don't Have Access

• Focus on reducing hot water use at the fixtures
• Report problems (inconsistent temperature, not enough hot water) to landlord