To make your bathroom more energy-efficient during a remodel: - Install low-flow toilets, showerheads, and faucets - Choose Energy Star certified ventilation fans - Add LED lighting fixtures - Install a tankless water heater - Use insulation in walls and around pipes - Opt for double-pane windows or skylights for natural light - Select energy-efficient radiant floor heating - Install a programmable thermostat for heated floors - Use sustainable and eco-friendly materials - Consider a dual-flush toilet to conserve water.