238000004519 manufacturing process Methods 0.000 description 5.238000002485 combustion reaction Methods 0.000 title claims description 3.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Knecht Filterwerk GmbH filed Critical Knecht Filterwerk GmbH Priority to DE19812565A priority Critical patent/DE19812565B4/en Publication of DE19812565A1 publication Critical patent/DE19812565A1/en Application granted granted Critical Publication of DE19812565B4 publication Critical patent/DE19812565B4/en Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links Original Assignee Knecht Filterwerk GmbH Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor Dietmar Gerwig Stefan Kaiser Conrad Keller Matthias Traub Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number DE19812565A Other languages German ( de) Google Patents Air intake manifold for internal combustion engine of motor vehicle Google Patents DE19812565A1 - Air intake manifold for internal combustion engine of motor vehicle But obviously if their solution is 'rip out and replace the ductwork' I'd prefer to have that be the last resort.DE19812565A1 - Air intake manifold for internal combustion engine of motor vehicle I do have them coming out next week for coil cleaning, and plan to get them to help my try to figure it out. Again, the leak is only from heavy rain, it's not a leak from the system itself (which is not on yet). Not a split system, central unit with condenser and blower and ductwork going into the house thru roof. Water getting into the return/ducts is a problem that needs to be fixed before it causes more extensive, expensive damage. I'd call an HVAC repair company if your troubleshooting has not solved the problem. It sounds like you do not have a split system. There is an insulated coolant pipe that runs between the two. Stan1 wrote:What type of system do you have? Often with central air it is a split system with a condenser outside the house (on the roof) and a fan/coil system inside the attic that connects to the return and ducting. My one thought was to put a bright camping lantern in the duct where the water has been, and then go up there at night and see if I can see light coming through somewhere.ĭoes anyone have any other ideas? It's really annoying. I'm at my wits end trying to figure this out and fix it.don't want to pay to have all the ducting ripped out. Also the dampness is only on one side of the duct, mostly it is dry. I've thrown roof coating on any surface where two pieces of ductwork are joined together.įrom inside, I've been able to feel some dampness on the upper (top side) of the duct, which leads me to believe that the rain is not, say, coming in from the underside. I've been up there numerous times looking for some sort of hole or opening. With heavy rain storms we're getting quite a bit of water leaking down. Over the years (system is 7 years old) we've had very, very occasional drips coming down from the opening of the return (where air is sucked in), usually only from severe storms with lots of wind. We have a central air unit on the roof with accompanying ductwork.

Air doc intake