Why is separated combustion important in the Reznor UEZ series?

Hello, thank you for reaching out. Separated combustion allows the Reznor UEZ heater to isolate combustion air from indoor contaminants, which is especially valuable in spaces containing dust, chemicals, or airborne particles. This design can help extend component life and maintain safer combustion performance because the burner is not relying on potentially contaminated indoor air. If you have additional questions, please feel free to reach out over the phone to our Customer Service line at 1-888-901-5460. Have a great rest of your day.