BigNick Posted April 19, 2022 Share Posted April 19, 2022 (edited) So, I try to keep the inside of my Hydrohot cabinet clean and tidy, I've spent enough time and money in there and now the system works great. Problem is, there is a giant ventilation hole in the bottom of the cabinet to the bottom of the coach. As a result the cabinet constantly gets filled with road grime and if its wet out, wet road grime. Anyone come up with a fix? Maybe a filter element? Or maybe just cover the hole up? I think since there's combustion going on in that compartment, there's probably some reg about ventilation, but, I'm pretty sure its not air tight anyway. Edited April 19, 2022 by BigNick Spelling Link to comment Share on other sites More sharing options...
joefromperry Posted April 19, 2022 Share Posted April 19, 2022 If yours is anything like the aquahot in my 2003 Signature, that large hole in the bottom lines up with the air intake of the diesel motor / burner, and it needs all the air it can get to function properly. I wouldn't cover that hole. I've never had a problem with road grime piling up in the cabinet. Link to comment Share on other sites More sharing options...
BigNick Posted April 19, 2022 Author Share Posted April 19, 2022 Your lucky, I take a trip and poof, a load shows up. I'm in there with the vacuum cleaning it out. Link to comment Share on other sites More sharing options...
Ivan K Posted April 19, 2022 Share Posted April 19, 2022 This is interesting to me. Our AH box does not have any opening besides for the coolant hoses on top. That's the only way fresh air can get in. The basement compartment does not have any ventilation provisions except for an opening to other compartments ceilings between the frame rails. Never crossed my mind that it could be a problem and it isn't. No outside dirt can get in there from the ground level but there must be enough leakage between the rails to make it work. Link to comment Share on other sites More sharing options...
BigNick Posted April 19, 2022 Author Share Posted April 19, 2022 13 minutes ago, Ivan K said: This is interesting to me. Our AH box does not have any opening besides for the coolant hoses on top. That's the only way fresh air can get in. The basement compartment does not have any ventilation provisions except for an opening to other compartments ceilings between the frame rails. Never crossed my mind that it could be a problem and it isn't. No outside dirt can get in there from the ground level but there must be enough leakage between the rails to make it work. Point being your unit runs fine without the giant hole in the floor Link to comment Share on other sites More sharing options...
Ivan K Posted April 19, 2022 Share Posted April 19, 2022 2 minutes ago, BigNick said: Point being your unit runs fine without the giant hole in the floor Exactly Link to comment Share on other sites More sharing options...
96 EVO Posted April 19, 2022 Share Posted April 19, 2022 Mine has about a 3" hole in the floor, directly under the burner air intake. Originaly, it had a soft rubber boot running thru that hole, and hose clamped to the burner. I read a couple of yrs ago AH asked that you remove that boot, as they were collapsing, and cutting off combustion air. I removed mine, and fitted window screening over the hole in the hopes of keeping critters out. Link to comment Share on other sites More sharing options...
BigNick Posted April 19, 2022 Author Share Posted April 19, 2022 Mine has a fairly course screen to keep critters out but not dirt, I'm thinking of permanently mounting a washable filter element there. Lets the air in but not road filth. Link to comment Share on other sites More sharing options...
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