| Author |
Message |
Peter Ehlert (Sdibaja) (209.132.90.66)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, May 17, 2002 - 7:23 am: | |
The converter of our 4905 installed 2 Suburban furnaces, both in interior cabinets. The duct system sucks, I plan to install new floor registers and do it right.
The big thing is that I want to free up the cabinet space and install the furnaces in the cargo bays. The combustion intake/exhaust now runs thru the coach wall. One way is I can move the furnaces straight down and mount to the ceiling of the cargo bays. Suburban says the maximum horizontal exhaust and intake length for my furnaces is 9 inches. Looks like the total run from furnace to existing openings would be nearly 3 feet, almost all vertical but at the limit of the 9" horizontal spec. That does not sound like a good idea.
So, I think I should move the furnaces to the floor of the cargo bays and run the combustion intake and exhaust thru the floor of the bay. The ducts then would go straight up and then along the underside of the coach floor to the new registers. I see no provision for intake ducting for unheated air; I guess I would just draw air from the bays.
Anyone been there and done that? Is there a better way?
Peter |
BILL BUTLER (172.171.111.158)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, May 17, 2002 - 5:08 pm: | |
PETE; I INSTALLED A SUBURBAN IN THE CENTER BAY OF MY 4905 AND IT WORKS GREAT. I MOUNTED IT ON THE FLOOR OF THE SECOND BAY FROM THE FRONT ON THE DRIVERS SIDE. I RAN FOUR, FOUR INCH HEAT DUCTS AND TIED THEM INTO THE EXISTING DUCT SYSTEM. I CUT A HOLE IN THE FLOOR FOR AIR RETURN AND PUT A REGULAR HOUSE FLOOR GRILL IN THE HOLE. I CUT THE EXHAUST/INTAKE INTO THE BAY DOOR SO THAT WHEN THE DOOR IS CLOSED IT FITS NICE AND TIGHT AROUND THE CHROME FITTING ON THE FURNACE EXHAUST. IT TOOK SOME FITTING BUT MY BAY WAS NEARLY EMPTY SO I COULD WORK IT FROM THE INSIDE WITH THE PASSENGER SIDE BAY DOOR OPEN. IT IS A NICE INSTALLATION AND WORKS GREAT AND TAKES A MINIMUM OF SPACE. I INSULATED THE FOUR INCH HOT AIR DUCTS WITH FIBREGLAS THAT I CUT INTO 6" STRIPS AND WRAPPED IT WITH THE FOIL OUT USING DUCT TAPE. GOOD LUCK.
BILL BUTLER |
Ross Carlisle (Ross) (216.107.195.106)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, May 17, 2002 - 9:47 pm: | |
You can make the exhaust longer by increasing its size. Likewise, ou can add a bent if you increase the size. Adding bends or increasing the length adds restriction to the exhaust. Increasing the vent tube size decreases restriction. I'm not sure how you would figure out exactly how large the vent tube should be based on length or number of bends.
I am installing my Suburban on the floor of a bay with the vent running down through the floor. The vent extension will be about 1" larger that the factory vent tube. Not sure if that is right, but it should get me close.
Ross |
|