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How to retrofit furnace vent cover

Step by step instructions to install a furnace cover to help increase air flow

Increased air flow can help furnace performance, particularly at higher altitudes. To increase air flow, we have designed replacement vent covers that straighten the ducting path. We can send these vent covers to you.

Determine Correct Replacement Vent Cover

Step 1: Remove the furnace vent cover

Step 2: Measure the distance between the left side frame to the left of duct opening (see photo A)

Step 3: Measure the distance between the top of frame to the top of duct opening (see photo B). This provides the vertical offset measurement

Step 4: Provide these measurements to FWC service department to acquire replacement vent part. Send to svc2@fourwh.com

 

Install New Replacement Furnace Vent Cover

Step 1: Remove the original black plastic furnace vent cover

Step 2: for NON-Shell model campers - Keep the black plastic frame

Step 3: Remove the silver flexible ducting from the original vent cover

Step 4: Attach the silver flexible ducting to the replacement vent cover

Step 5: Straighten the silver flexible ducting and remount vent cover to black frame with two screws

Step 6: Install complete

Questions: Contact svc2@fourwh.com