I'm not even sure my Marvin heater is the 2160 because it doesn't state the model number ANYWHERE. I do have a product line code stamped on the housing. Problem: Went to replace quartz element but replacement was not as easy as expected. May have goobered it up beyond help. Thought it would be a pop-out and pop-in kind of deal. It could be that I really don't have a Marvin 1260 but some type of 'between' model configuration. Could us some help here...WB Marvin CO. is out of business.