The Butler Maximum Heat Exchange System's revolutionary design allows the Butler System to operate at water temperatures up to 240F* without compromising the simplicity, quality and reliability that has distinguished the Butler System since 1980.
The Butler Maximum Heat Exchange System captures heat from the van's engine coolant and vacuum/blower exhaust without bypassing water or adding any other controls or fluids. The Butler Maximum Heat Exchange System is offered as an option on new Butler Systems.
If your van cannot be parked in a heated garage during the winter months and the temperature is expected to be below freezing (32°F), it is EXTREMELY IMPORTANT to WINTERIZE your Butler System. The Butler Corporation’s warranty does not cover freeze damage. If freeze precautions are not taken, you are risking expensive damage to the Butler System. With a few basic procedures, freeze damage can be avoided.
If the Butler System has experienced a freezing situation anywhere within its components, there is a possibility that other unforeseen complications may appear sometime in the future. Replacing the part or parts that were obviously damaged from freezing will solve the immediate problem. However, it is unseen damage that may cause one or more of the System’s components to fail at any time. Exposing any mechanical component to freezing will put excessive stress on that component and may cause distortion and premature part failure. This distortion may not become evident for months. In fact, a part may fail in the middle of the summer, and its cause is the direct result of freezing during the past winter.