I have an AHS E140 system and bought used 3 years ago. Last year I finally got around to installing the unit into my new garage addition. The first couple of months I did not have any issues with water collecting in the ash pan. Around Feb of last year it has been an issue which I can not resolve. During the summer I cleaned the system completely putting in new gaskets, rtv flanges. I fired the unit up about a week ago and today when I went to clean out the ash pan there must have been a gallon of water in there (at least that much). I come off the furnace into the cyclone ash collector and from there it is a 5' vertical pipe which leads to a 3' horizontal pipe which exists the garage to my main chimney. which is probably 20' high. The outside chimney is insulated while the garage pipe is sst uninsulated. At the bottom of the outside chimney I have a clean out port (This had water in also). I am very frustrated with this furnace and this problem. I can not shutoff my make up water because I have this plumbed into my existing furnace which supplies hot water for showers and washing dishes.