What is your temperature of room air coming out of your pellet stove

[Doug Doty]

I am just using an IR temperature gun but I consistently see 325 degrees on the output of the 14 heat exchanger tubes when set on high and my pellets are burning their best.

Just for fun I also checked the velocity of the air coming out with my little Kestrel wind meter and it was 13 mph in the best spot.

 

[checkthisout]

That's 325 degrees on the metal tubes, yes? Your actual air temp after passing over passing over those 325 degree tubes is probably much lower than the surface temperature of the tubes.

You'll need an actual thermometer/thermistor to measure the true temperature of the air exiting the stove.

 

[TimfromMA]

Im at 215 degrees.

 

[F4jock]

Im at 215 degrees.

Air out was 115 degress at 15% humidity. The variable one has to consider is pellet feed. Mine was only feeding 6.4 seconds / minute at the time. If the stove was really cranking I'm sure temp would be higher. Also I don't have my blower all the way up so less air movement at top end would also affect temperature. For a good comparison we'd all have to have identical settings. Then we'd need to know if blower and feed capacities are the same among the various models. IMNTBHO it's very hard to compare meaningfully.

 

[TimfromMA]

My stove is on setting 3 out of 5 and Im burning DF pellets.

 

[F4jock]

That's 325 degrees on the metal tubes, yes? Your actual air temp after passing over passing over those 325 degree tubes is probably much lower than the surface temperature of the tubes.

You'll need an actual thermometer/thermistor to measure the true temperature of the air exiting the stove.

Amen. Think about it. If the air itself were that hot you'd burn yourself at the outlet. Doubt it's much over 120f when you're cranking. The metal of the exchanger is what gets really hot.

 

[Big E]

448 degrees with IR, down through tubes. setting 3 out of 5 (I only use 2-4)

 

[tjnamtiw]

If you want to see how the temperatures and air speeds vary from tube to tube and possible ways to gain more heat, sit back, grab a brew, and work slowly through this post.

https://www.hearth.com/talk/threads/quadrafire-castile-experiment.58216/#post-58216

 

[tjnamtiw]

448 degrees with IR, down through tubes. setting 3 out of 5 (I only use 2-4)

You're reading metal temp down in the heat exchanger at ONE spot. The IR detectors are notoriously inaccurate and dependent upon the surface reflectivity and texture. If you always point to exactly the same spot, they can be used to see variations in temp for different scenarios.

 

[LordmetalZ28]

I wondered about this. In the morning when I first start up the convection air is alot colder going thru the exchanger. I start out with 150deg on 1 then later in the day when things get going I get 210deg. All on one

 

[Doug Doty]

That's 325 degrees on the metal tubes, yes? Your actual air temp after passing over passing over those 325 degree tubes is probably much lower than the surface temperature of the tubes.

You'll need an actual thermometer/thermistor to measure the true temperature of the air exiting the stove.

Huh, your absolutely right, I was not thinking right there, that would be the tubes themselves, now how to measure the air...

 

[tjnamtiw]

(broken link removed to http://www.ebay.com/itm/Handheld-K-Type-Thermocouple-Temperature-1000C-Humidity-2in1-Meter-Tester-GM1361-/281483204330?pt=LH_DefaultDomain_0&hash=item4189b4d6ea)

(broken link removed to http://www.ebay.com/itm/Alnor-Pyrocon-Vintage-Handheld-Thermocouple-Thermometer-Pyrometer-0-400-Deg-F-/161494277546?pt=LH_DefaultDomain_2&hash=item2599cf1daa)

You need something like these to measure the air temp without interference from the metal.

 

[reallyte]

I am pretty sure the ambient intake air temp is another factor to consider.

 

[DneprDave]

The temperature is warm, that's good enough for me.

 

[Big E]

I agree, but I started using the IR thermometer to check the difference in pellets (NEWP VS. Barefoot. I use those readings as my baseline, so I know if I am or not getting the same heat output.

 

[tjnamtiw]

I agree, but I started using the IR thermometer to check the difference in pellets (NEWP VS. Barefoot. I use those readings as my baseline, so I know if I am or not getting the same heat output.

As long as you are always shooting at exactly the same spot, with the identical burn conditions, that's a good application. Just make sure with the different brands, that your flame height is the same, meaning that you are burning the same lbs/hr. That's where most misconceptions come about labeling one pellet 'hotter' than another.

 

[kappel15]

A simple candy thermometer stuck in a tube will work, or digital meat thermometer

 

[Bob E]

I took the thermometer off of my grill and stuck it in my vents. It is telling me 200 on setting 5 out of 9. I'm not worried about it being inaccurate, as long as it consistently inaccurate. Helps me fine tune the stove for the best heat and compare pellets. My forehead can get a little warm when trying to read it though

 

[Big E]

As long as you are always shooting at exactly the same spot, with the identical burn conditions, that's a good application. Just make sure with the different brands, that your flame height is the same, meaning that you are burning the same lbs/hr. That's where most misconceptions come about labeling one pellet 'hotter' than another.

I only burn Barefoot now, dealer has those and Energex. I may try those, but 18 tons split 3 ways, @ 250.00 a ton, bought in April.

 

[SidecarFlip]

I took the thermometer off of my grill and stuck it in my vents. It is telling me 200 on setting 5 out of 9. I'm not worried about it being inaccurate, as long as it consistently inaccurate. Helps me fine tune the stove for the best heat and compare pellets. My forehead can get a little warm when trying to read it though

Yep... If you wear cheap plastic glasses, they do can get saggy.....

If our dog is happy (with the output) so are we....

 

[MikeinRI]

I have seen 650 when its really cranking.

 

[SidecarFlip]

That will melt tose cheap Wal Mart reading glasses................

 

[TimfromMA]

I have seen 650 when its really cranking.

That sounds highly questionable to me.

 

[tjnamtiw]

That sounds highly questionable to me.

NFW! Take that back to Harbor Freight!

 

[SidecarFlip]

Maybe the viewing glass, but an IR thermometer can't read the glass 'cause it's a reflective surface..., I'd return it to HF too, it's off.