Tag Archives: salem vent

New Make-up Air Vent for our Aluminum Home

Full-timing allows us to experiment with strategies for heating, cooling, venting, cooking in our RV. We thought for years about installing a make-up air vent.  We guardedly use an unvented 6,000 btu catalytic heater, and use the windows and roof vents to properly add oxygen and remove products of combustion. Safety concerns prevent us from using the heater when we’re asleep or without adequate ventilation.

Otherwise, we enjoy the soft warm glow and heating without any electricity. These benefits are especially nice when we are dry-camping and want to make our batteries last longer. Full-timers might have more opportunities to use this convenient heater, but it would work for anyone.

The heater has explicit recommendations for 24 square inches minimum each for fresh air intake and exhaust. No matter which window we use we seem to have a draft. Rain can limit which window we open. An intake located near the heater would serve the heater as well as the oven and stove.

We’ve read and heard that Wally Byam, Airstream Company’s founder, had gravity floor vents in his own Airstream trailers. Without air conditioning, the best place to find cool air is under the trailer. Jim proposed numerous times installing a gravity floor vent near the oven or catalytic heater. But management would not approve the project.

Jim found an approvable solution recently while we were at Alumapalooza at the Airstream Factory. Airstream Company (and others, too) installs Salem vents in the Eddie Bauer version of their trailers to vent flammable gases from motorcycles or gas cans in the trailer. Easy to install and operate, weatherproof, and durable, these are neat vents.

The vents can be a little difficult to source using the patent name, Salem vent. Just today, Jim found an easier name for search — 2-way hingeless vent. Several sources list these for under $30. Ours came with an abs plastic trim ring for the interior.

Here are pictures of the install:

Protect the aluminum before marking the cut lines

Protect the aluminum before marking the cut lines

Cut completed and pilot holes drilled to inside

Cut completed and pilot holes drilled to inside

Small holes for locating, large hole for starting saw blade

Small holes for locating, large hole for starting saw blade from indoors

Interior cut, fortunately it's above the 110vac wiring for receptacle

Interior cut, fortunately it’s above the 110vac wiring for receptacle

Vent sealed and riveted.  When caulk skins, we'll cut the Olympic rivets pins

Vent sealed and riveted. When the caulk skins, we’ll cut the Olympic rivets pins

This page cross-references with our web page about catalytic heater venting and about Salem Vent.

 

 

See you down the road!

Jim and Debbie

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