campinia wrote:
Mr. Heater Portable Buddy Heaters work very well in tents and are used all over the upper Midwest for ice fishing in enclosed tents/shacks and they work very well. As has already been said, they do include safety devices built into them. This is directly from their website: "With the Oxygen Depletion Sensor (ODS) and accidental tip-over safety shut-off you can be sure that you will enjoy years of comfortable indoor safe heat." I have used one for 10 years while ice fishing and also used it in one of our first pop ups. Follow the directions provided and you will be safe and warm.
Their "website" might say that, but the MANUAL does not, at least the manuals listed on their website..
The manual is full of contradictions also..
You do realize that the so called "Oxygen Depletion Sensor" (ODS) is nothing more than a THERMOCOUPLE!
Yep, a good old fashion thermocouple..
Operation works like this, thermocouple must see enough heat to hold the gas valve open..
When oxygen starts getting low, the flame no longer is able to cover enough of the thermocouple and the gas valve closes shutting down the heater..
While this acts as a SIMPLE way of determining if there is enough oxygen, it is in no way, shape or form what I would call "accurate"..
Thermocouples are not accurate, thermocouple must be positioned correctly and the gas valve may or may not be very accurate in operation..
It is for those reasons the manual STATES CLEARLY that you must provide OUTSIDE AIR..
And by the way, the point where the flame starts to die and to the point the valve actually closes that heater will be making carbon monoxide due to incomplete combustion..
Sure, many people use these heaters and live to tell about it, but it would certainly be a bad day, to be the one that woke up the next morning DEAD!