Flame King portable propane heater

wopachop

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Mr Buddy has been plowing away at keeping people warm for years. Then comes along a competitor by the brand name Flame King. Sounds like a Simpsons episode. 

Watched a video on the Flame King and really like it!!! Here are some Pros and Cons i gathered from the vid.  

PROS:

1. You can run the 20,000BTU model on HIGH using only 1 propane tank (or a hose adapter to larger tank).

2. There is a thermostat and pilot light. In theory this should save propane and allow the unit to cycle on and off as needed. 

3. It has a built in fan. (it can be modified to run off 5v USB power packs)

CONS:

1. The fan uses (4) D cell batteries.

2. The fan has a 6v socket to plug into a wall, but that is not included for the $159.99 price at the time of typing this.

3. The fan is 6v, which in 2021 is ridiculous!! It should be 5v to run off USB power packs. 

4. I suspect this model will become much cheaper in price, when a newer model with rechargeable built in battery is eventually released.



 
Mr Buddy has been plowing away at keeping people warm for years. Then comes along a competitor by the brand name Flame King. Sounds like a Simpsons episode. 

Watched a video on the Flame King and really like it!!! Here are some Pros and Cons i gathered from the vid.  

PROS:

1. You can run the 20,000BTU model on HIGH using only 1 propane tank (or a hose adapter to larger tank).

2. There is a thermostat and pilot light. In theory this should save propane and allow the unit to cycle on and off as needed. 

3. It has a built in fan. (it can be modified to run off 5v USB power packs)

CONS:

1. The fan uses (4) D cell batteries.

2. The fan has a 6v socket to plug into a wall, but that is not included for the $159.99 price at the time of typing this.

3. The fan is 6v, which in 2021 is ridiculous!! It should be 5v to run off USB power packs. 

4. I suspect this model will become much cheaper in price, when a newer model with rechargeable built in battery is eventually released.
So, which is it?

 
Since it runs on 6V worth of D-cells, I doubt it'll care much that you plugged it in to a 5VDC source. 

 
Yup i agree giving the 6v fan 5v wont harm anything. I ordered from amazon and the first unit was damaged. They sent a replacement and i just finally fired it up last night. Not sure i like the thermostat feature. It causes the propane flame to flutter, and then i believe the device that closes and shuts off the propane begins to whistle. I recreated it a few times and it whistled every single time. I still have the unit that i need to return. Thinking about firing that one up and seeing if it makes the same noise.

Turns out the fan is 80x25mm and 12v. I notice that with the propane on low setting, the fan at 6v will blow fast enough to cause a problem. Im not yet sure if its the oxygen sensor or the thermometer being triggered. I dont think its the force of the wind itself blowing the propane, because the heater starts to flutter and slowly shut down just like it does when the thermostat turns the unit off. 

The biggest negative so far is that even on low setting its mega hot. That doesnt match well to a thermostat feature that makes a whistle noise. I was hoping to leave it on low setting all night long. Letting the heater cycle on and off. Which is still possible. Might just be a tad bit loud. Its the kind of high pitched noise that once you hear its hard to get away from. Others might not hear it at all. 

I will use a better phone to get video and sound of the propane whistle noise. Also can hear the loud sleeve bearing 12v fan. My original plan was to mess around with the stock fan and give it higher voltage until it overheated. Then would replace with something 5v to accept USB power. Some of those fans come with adapters to slow them down. As expected at some point there will be too much airflow, unless its directed better. I plan to add vents to the back and foil tape any cracks allowing air in spots it shoudl not go. The current path of the air to be heated runs right passed the cold propane tanks. Im surprised how much open propane flame comes off the top of the heater on low setting. With the fan completely off. Its a lot of heat that could blow outward instead of upward. 

Already had the little voltage regulator in the picture. Using it temporarily to turn the fan up and down. See how high it can go before it causes issues. I wonder if the design team made some prototypes and determined the 12v fan at 12v speed was too fast? The plastic molding that holds the D batteries is part of a main housing. So that makes me think maybe 6v using outdated ghetto blaster D batteries was the plan all along. Heck maybe it was designed 10 years ago before 5v USB became the norm?

For anyone that followed along the stock fan at 5v works fine if you want to rig it to run off USB. There are 3 wires going to the plug underneath.

Green=Pos

Black=Neg

White=Battery Pos (dont use this one)

Pic below is the voltage regulator. It was plugged into USB getting 5.2v and the output at the time was at 8.5v. I only messed around with it for about 10 minutes. In a way the fan dont really do didly squat. I couldnt really tell if i could feel it. Mostly just felt like my hand was burning hot regardless of setting. 

20211018_201120.jpg

 
FWIW, when I looked into all of the heater options for my trailer, I bought a small Atwood RV heater & stuck it into the bottom of my cabinet.  its nice to just slide the thermostat over to "hot" & let it do its job. 

Bob

 
Just buy a flipping Blanket. Have not turned my heater on in years except for a few minutes while I take a shower and I run the genny while I do it.  No bottles no clicking noise no dead battery just a nice warm down comforter that has kept me toasty warm in below zero weather.

 
Im the same out in glamis. If i fire up the genny for morning coffee i will also crank the water heater and furnace. Take a shower. Maybe nuke some mornin pizza. 

Looked into modding the stock furnace. But it has the safety device that shuts everything down if the fan speed is too low. A small furnace like Bobolos describes would be sweet. Or so many AH of batteries and solar that you never think twice about battery levels. We do watch movies a lot in my trailer and the stock furnace is loud enough that you have to turn the movie volume up every time the furnace clicks on. At least the flame king is quiet compared to the furnace. 

 
I have a "large" steel wood fired stove for hot tenting, a small titanium folding wood stove for backpacking, a Chinese version of a Webasto diesel heater and a couple of the Big Buddy heaters. The knowledge gained from these kind of overlaps.

The Webasto clone can crank out some heat, like in the back of a really long trailer with the hot air blown in with vent hoses. The fuel pump makes a ticking noise when It's running, but noise isolation tricks work well to fix that. It draws only about 43 watts when running and is controlled by a digital thermostat which I extended to about 15 ft. Works better than a wood stove for hot tenting and is very quiet. Two advantages over propane are it doesn't produce water vapor like propane catalytic heaters do, and it is very efficient, using probably 1/2 - 2/3 gal of diesel per weekend if run all night.

In the process of researching wood stoves, I came across these thermoelectric fans, powered by piezoelectric chips. As the temp. goes up, they run faster and faster while still being quieter than the wood stove itself. I found out that some people were cutting a slot in the base of the fan and it would sit on top of a Buddy heater and blow the hot air quite a distance into the room, while using no electricity and being quieter than the catalytic heater.

Wopachop, you seem like a tinkerer. Check it out!



 
Thank you!!! Those are fascinating i didnt know they existed. This short video gets extra good at 1:15. 



 
30 minutes ago, wopachop said:

Thank you!!! Those are fascinating i didnt know they existed. This short video gets extra good at 1:15. 

Yes, they're pretty interesting, although not very efficient. The older 12v coolers used to use those for cooling and they were never as fast or as efficient as 12v compressor style coolers. Each junction is capable of X amount of heat transfer and you can stack them to double or triple the delta T, but to get any real cooling from them, one would have to use 4 on the first layer and 4 on the 2nd layer, by then a compressor is far more efficient. This application seems to be well suited for their capabilities.

I learn a lot from YT videos, someone has probably done a piezo fan shootout and determined which one has the most efficient motor and fan blade configuration. I bought one with 2 smaller fans based on a YT video and it does put out quite a bit of air while turning lower rpms, which keeps them quieter and smaller.

 
Put 5gals through this thing. Have some thoughts if anyone feels like reading. I still have never seen a Mr Buddy in person. So cant compare the two. I believe this one cost more, and i was excited to pay more for the features, but the features suck. The design team really screwed this one up in my opinion. Will post the good and bad again. 

Good:

1. Im able to start it quickly, and it puts out a ton of heat instantly. The pilot will light on the 2nd or 3rd click. Youre supposed to hold it down which i did at first. But instead once the pilot lights just turn the knob to on and it will fire up. No need to hold it down. I will set the heat a little bit passed the low setting and take a shower. By the time i come out the main body of a regular toyhauler is much warmer. The super chilly air is gone. A ton of heat rises upward from it. I will open my shirt and perform my best hot air balloon impression. Will also take a piece of clothing that is cold and hold it over the heater. I cant believe how quick it warms up. Like 5-10 seconds and a sweatshirt or jacket will be regular temp instead of cold to the touch. 

2. It has 2 options for using a 5gal tank. Theres a quick release gas connection but it is not regulated. So if you buy a hose for that, you need a hose with a pressure regulator. The other option is using the connection where a 1lb propane tank screws in. That has a built in regulator. I ordered a 5 foot hose from amazon. Im a fan of the stainless braided hose with a gauge. First time trying the POL reverse thread connection. It has an additional oring is why i think it might be superior. It looks like the hose oring makes contact with the rubber seal of the tank. The first hose i bought leaked where the hose met the gauge. That is one reason i really like the gauges is because you can shut everything off and make sure it maintains pressure overnight or even for an hour. My leak took about an hour for the gauge to go down which alerted me to a leak somewhere. I sprayed some lube and kinda wiggled the loose spot. It ended up sealing and working for about a week. Then returned it and the new replacement hose has been solid. It might be a good idea to zip tie the hose where it exits the heater. I posted a picture. Drilled a hole and used 14awg solid wire. Its held pressure for over a month. I turn the propane tank on and off as needed. But the hose is always pressurized and nice to confirm its holding. Only slight negative is the stiffness of the braided hose. A more flexible hose would be nice for moving the heater around. I dont want the stiff hose to bend at the connections, and cause stress and possible leaks. The hose has definitely loosened up a bit since brand new. The Hose

Bad:

1. This unit has a thermostat. Its controlled by a big long thermometer that runs down the side of it that im hoping to bypass. On paper it sounds economical for the heater to shut off automatically. In reality it does not work great. The heater slowly shuts down and does not burn the propane efficiently. It starts to smell weird and make a lot of noise. The sound of propane flickering on and off is alerting. As soon as i hear that noise i either turn the knob down to pilot, or turn the knob up high.

2. That is another major problem. You cannot set this unit to low and leave it there in the ambient temps we will see in glamis. The thermostat will kick in and start flickering the propane. I wish there were 2 knobs. One knob would control the BTUs from Low to High. The second knob could be a thermostat. Like you find on household electric heaters. You have high and low setting. Then also a thermostat. This unit combines them both together, which for me inside a toyhauler doesnt work. I want to set the heater to low without the heater shutting itself down 3 minutes later. 

3. The built in fan is a complete failure. At 5v no air comes out. I tried it again last night at 8v and it disrupts the burning of the propane. Doesnt even blow air forward out the vents. Its a total gimmick and got me to buy in. Dude in the video made it seem sweet. He even has a second video about buying some 5v to 6v adapter. I almost wrote a comment on his youtube with good intentions to say its actually a 12v fan. You could give that sucker up to 14v i would imagine. Woudnt matter though. All it does is blow turbulence over those ceramic plates that the propane is supposed to flow over nice and smooth. Having a fan above the unit will be awesome. Because like mentioned above there is a ton of heat that flows upward off that sucker. You could practically use a piece of curved metal and use the natural convection to blow the air more forward. 

The plan:

1. Bypass the thermostat feature. 

2. Omit the battery side cover and start cutting away unneeded plastic. Cut away the other side plastic panel where the big thermometer is hiding. That should make the unit about 4" narrower. 

3. Cut away the top plastic where the fan switch is. Will put some other fan there. Or maybe try out the curved metal convection forced air movement. (Cardboard lined with foil might work for a quick test)

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What makes the pics upside down? I tried twice. I send them from my phone to email and they look normal there. 

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How many BTU does the name plate say it is? That would help people to make a comparison to the different Mr Buddy heaters. This unit, as with all catalytic heaters, produces 1.6 lbs of moisture for every lb of propane burned.

 
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