We stock every part for the Nortec MHB Series Evaporative humidifier ever made. Our technical support team can assist you should you have any questions about your Nortec MHB Evaporative humidifier. You will find on-line owners manuals as well as exploded views of your model on this parts page. Remember to wash out your Nortec humidifier system every 800 run hours for optimal operation.