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Portable Propane Patio Heater, 9000 BTU
Backyard & Outdoor Living

Portable Propane Patio Heater, 9000 BTU

Part of the Backyard & Outdoor Living collection
$109.99
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One hour on high is the figure that defines this heater. A 1 lb cylinder at 9,000 BTU is gone before a football game finishes, and three hours on the 4,500 setting is the realistic way to use it: a tent porch at dawn, a greenhouse during a frost warning, a garage bench on a Saturday morning. Two hundred square feet is a single-car garage or a small patio corner, and the oxygen depletion sensor is what makes the enclosed version of that acceptable.

Output
4,500 / 9,000 BTU
Coverage
Up to 200 sq ft
Runtime
3 h low, 1 h high on 1 lb
Safety
ODS, tip-over shut-off

How it lives in the room

Use 4,500 BTU as the default

Half output triples the useful life of a canister and is enough for a two-person patio corner or a greenhouse holding off a light frost. The 9,000 setting is for the first fifteen minutes, to bring a cold space up, and then back down again. Treating high as the normal setting is how people conclude that a 1 lb heater is impractical and leave it in the shed.

Point it at knees, not air

A 9,000 BTU radiant heater warms what it can see. Outdoors, aimed across an open space, almost all of it is wasted; aimed at the lower half of people sitting two or three feet away, it works. Set it low, close and facing the group rather than high in a corner, and keep fabric and furniture clear of the front, because the tip-over switch stops the gas and nothing stops a cushion already against the grille.

Then store it with the valve off

A disposable cylinder left threaded onto a stored heater weeps slowly through the seal, and the heater comes out next autumn with an empty canister and a smell in the shed. Unscrew it, cap it, and keep both somewhere ventilated that is not the car. The carry handle makes separating the two easy enough that there is no reason to leave them connected.

Before you order

It is rated for outdoor use, and the 200 sq ft figure assumes air arriving from somewhere. A sealed shed or a zipped tent is exactly the situation the oxygen depletion sensor exists for, and a shut-down there means the ventilation was wrong, not the heater.