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Old 11-09-2013, 11:25 AM   #1
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Workhorse Chassis Owner
Join Date: Apr 2010
Location: Casa Grande AZ
Posts: 246
Basement air filter change

Have a 2004 Dolphin, with basement air heat pump. Where is access to filter? Can't seem to locate access from under unit. Help appreciated.
Alleyman; 2004 Dolphin 5355; Banks Power Pack, Ottominder; 405 Watts Solar, 2010 Explorer XLT Toad. four month boondockers!
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Old 11-09-2013, 03:16 PM   #2
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Location: Madison, MS
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Not sure a NRV units, but "most" SOBs with basement A/C have a residential sized filter under the BED, accessible from the inside of coach, either by raising the bed, or opening a small access panel in the side of the bed. Good luck. Ed
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Old 11-09-2013, 06:39 PM   #3
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I'm not familiar with your floor plan, but on our 2008 National Pacifica you remove the bottom drawers in the dresser and reach down to remove two washable foam filter strips. The can be a bear to locate the first time you look. Just pull them out either rinse and dry or shake the dirt dust and lint off.

Another way to locate the approx. location would be to open the basement compartment section where your basement a/c is located. You should see a round vent going towards the rear of the coach and a rectangle shaped foil return duct coming in from just above the a/c unit. Then go to the part of the coach just above this return vent and start looking. National RV was pretty creative when hiding the location.

Good Luck,
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Old 11-09-2013, 06:40 PM   #4
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Also, there is a National RV sub-form here on the site. You may want to check it out.
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