Jotul 602 V3

[Todd]

F 602 V3 | Wood stoves - Traditional

F 602 V3 - Wood stoves. Little Giant

www.jotul.com

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[Dajolu]

Id like to get one of these for my work shop some day. How do they get away with not having a by-pass for the cat? How does that work? I'm not familiar with that set up. And are there drawbacks/limitations to not having a bypass?

 

[Woody Stover]

Those eggs are making me hungry! 🤤😋

 

[begreen]

I'm skeptical but hope it works out. The lack of a flame shield and bypass may lead to premature deterioration and plugging.

 

[Woody Stover]

I'm skeptical but hope it works out. The lack of a flame shield and bypass may lead to premature deterioration and plugging.

Top-down starts would be mandatory, to keep unburned crud going into the cat at a minimum.

 

[begreen]

I'm also wondering how long the refractory side blocks will last.

 

[Todd]

Id like to get one of these for my work shop some day. How do they get away with not having a by-pass for the cat? How does that work? I'm not familiar with that set up. And are there drawbacks/limitations to not having a bypass?

This cat is a bit different than your typical cat, it has larger cells to let more air flow through so they claim no need for a bypass. Also a 20 year warranty. It’ll be interesting to see how it performs.

 

[Todd]

I didn’t see any EPA test report just the manual. 5000 BTU low burn rate and 23,000 high burn rate. The V2 was much higher but could be a different testing method?

 

[Wisco Shepherd]

Man it's a bummer that this thing doesn't have a bypass I think that would make it a home run.

 

[Woody Stover]

I'm also wondering how long the refractory side blocks will last.

My Dutchwest has a refractory assembly. You have to handle it carefully, but it had held up pretty well. I think mine is original.
But it looks as though those blocks may be in direct contact with the cat, so I don't know. I'll guess that it wouldn't be an issue..

 

[stoveliker]

This cat is a bit different than your typical cat, it has larger cells to let more air flow through so they claim no need for a bypass. Also a 20 year warranty. It’ll be interesting to see how it performs.

I see a 10 year warranty on their website?

Their "no bypass so lower clearances" is strange to me.
Their "no bypass so always burning in clean mode" is bogus - the cat won't be cleaning up much when it's cold, which is when other stoves use a bypass route.

 

[Todd]

I see a 10 year warranty on their website?
View attachment 331594

Their "no bypass so lower clearances" is strange to me.
Their "no bypass so always burning in clean mode" is bogus - the cat won't be cleaning up much when it's cold, which is when other stoves use a bypass route.

Your right, they must of changed that, pretty sure it used to be a 20 year warranty.

 

[Todd]

Also has a auto secondary air control like the F445 and F500 V3.

 

[Todd]

Some numbers from the low run EPA test of the 602 V3. 6 hour test with Doug Fir dimensional lumber.
GPH .18
HHV efficiency 85%
LHV efficiency 92%

I would rather see some numbers from a cordwood test instead of 2x4’s but it still looks impressive.

 

[begreen]

Some numbers from the low run EPA test of the 602 V3. 6 hour test with Doug Fir dimensional lumber.
GPH .18
HHV efficiency 85%
LHV efficiency 92%

I would rather see some numbers from a cordwood test instead of 2x4’s but it still looks impressive.

Yep, that's pellet stove territory.

 

[ManitobaSky]

I will definitely be keeping an eye on the V3 for reviews etc. It looks like one of the few stoves I could actually use and not over heat my house if the turn down is as claimed.

 

[begreen]

According to the EPA report, the F602 v3's weighted average emissions rate for the 5 run test series was measured to be 1.4 g/hr with a Higher Heating Value efficiency of 77%. The average CO emission rate for the 5 tests was 1.3 g/min.

The test run achieving the low, 5,000 BTU/hr was with the air control fully closed for the duration of the test. A meager 4.51# of firewood in this test lasted an impressive 365 minutes. This appears to be the new low output champ, making it a good choice for small spaces and tiny homes.

 

[stoveliker]

What was the criterion to determine what the end time was?

 

[Todd]

Looking at the breakdown of the stove parts it looks like the V3 has side insulation panels, something I believe the V2 and CB do not have? Also noticed this in the F445 where the whole firebox is pretty much wrapped in insulation. Wonder how that effects heat transfer?

 

[EbS-P]

I really think the test methodology favors small stoves as they get up to temperature more quickly.

 

[stoveliker]

Looking at the breakdown of the stove parts it looks like the V3 has side insulation panels, something I believe the V2 and CB do not have? Also noticed this in the F445 where the whole firebox is pretty much wrapped in insulation. Wonder how that effects heat transfer?

small stoves have relatively larger surface area per the heat producing volume. So to keep the temp high enough for clean combustion, some insulation may be needed.
Of course wrapping the whole thing in insulation would send all the heat up the flue, which would be counterproductive...

 

[ManitobaSky]

Looking at the breakdown of the stove parts it looks like the V3 has side insulation panels, something I believe the V2 and CB do not have? Also noticed this in the F445 where the whole firebox is pretty much wrapped in insulation. Wonder how that effects heat transfer?

The parts list I found for the 602 V2 shows side and bottom insulation.
F602 V2 parts

 

[begreen]

What was the criterion to determine what the end time was?

EPA method 28R.

https://jotul-static-content.s3.amazonaws.com/usa/EPA_Reports/F602V3%20Non-CBI%20Certification%20Report.pdf

 

[stoveliker]

okay. That's all fuel mass has been exhausted (weight back to zero).

So less than a pound per hour, pretty nice!

 

[bigealta]

Any pics of the inside of the V3?