Bosch water heater takes a very long time to deliver hot water to fixtures

Safety first: This is typically a plumbing design issue, not a heater fault. No internal service is usually required.

• Measure distance: Estimate the length of hot water piping from the heater to the farthest fixture. Longer runs naturally take more time to deliver hot water.
• Consider recirculation: Install a hot water recirculation system compatible with Bosch heaters to reduce wait time.
• Insulate pipes: Insulate hot water lines to reduce heat loss and maintain temperature between uses.
• Check flow rate: Extremely low-flow fixtures may take longer to purge cold water from the line. Consider slightly higher-flow aerators or showerheads if acceptable.