Janet Black

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since May 31, 2015
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Recent posts by Janet Black

First photo is the dripping down the the thermal mass
The second photo is the dripping from the 3 clean out, the bottom of the upright flue
The third photo is the wet cap of the second clean out. The cap I already line with cob to make sure it will be warm and not to be cold
3 years ago
Additional photos
3 years ago
Hello everyone

I just burned my RMH this morning. We fixed only one problem, the other two problem is still there

Here are my RMH problem before:
1) Building up of red charcoal 2) Condense of water in the flue 3) Not that hot

I did a few changes in this burn:
1)add some hi for the chimney
2) redo the thermal mass with more clay
3) Add 1 more layer on the feed tube so it will be high enough to contain the firewood inside so I can closed the feedtube with a brick
4) Cover 2/3 of the feedtube with a brick during this burn
5) Put cob inside the cap of the clean out to make sure clean out cab will not get cold
6) Put roxul to cover all around the clean out
7) I don't have peter channel, neither the crate at bottom

Here is what I found out in this burn
1) Today after for about one and a half hour, I noticed I don't have building up of red charcoal. I think some how add more hi to the chimney and cover the feedtube with a brick help this problem. Right from the begining everyone told me to cover the feedtube with a brick, I couldn't follow because my feedtube is only one layer of brick above the burn chamber, too low to contain the firewood inside to cover with brick

2) During the burn, I noticed their are drips on the bench came from the upright flue. Water condense a lot as the photos
After the burn, I open the 2 clean out, and found out a lot of water condense too. I remember I redid the thermal on father's day, so June 21. It is one and a half month already, should be dried already right. I saw the surface dried off too. Why do I still have condense in the flue?

3) The temperature is not hi, around 550. Why?

Please advise

3 years ago

No, they are not chimney. They are ventalations for bathrooms. They are for the house. The green house is the one with plastic roof, grey roof is the house.
3 years ago

I never had a chance to burn my RMH since the chimney up higher. Temperature in this area has been always at high 80s-90s. There were a couple of days when temperature at low 80 but I missed them because I was busy remodel my greenhouse. I am done remodel the greenhouse and will pay closed attention to weather, will burn when temperature is at low 80 at least.

My cob bench was totally dried and yesterday I added more cob to fixed the cracks and the tilted/wobbling. The new cob also cracked, but thin cracks only. It should take only a few days to dry off the new cob. After that, when I burn there should be no dripping because the cob are all dried. If there is still dripping then something is wrong

Gusmus, I will try to burn to see if my RMH get better with higer chimney. Then I will make a grate.

Shilo, what do you mean little chimney? which one?

Enclosed is photos of my new set-up greenhouse. I took away the growing tubes and replace by verticle barrels. The growing tubes can grow 14 spots, with these new barrels, I can grow 100 spots. Also, I added an IBC totes 275 gal. Now I have 2 ponds to heat. My goodness, my RMH better be good or I'll be in bigger trouble.
3 years ago
1) I already redid my cob bench. Doesn’t matter how good/bad is my stove, any heat it can generate should be caught in the bench. So, I redid the cob bench. Last time 5 sands with 1 clay. This time 3 sands with 1 clay.

2) At the time redid the cob bench I took some photos. And before take down the cob bench, I measure some temperature at the 2nd clean out. 1 hour after stopped burning, I opened the 2nd clean out to measure temperature inside, and this is what I saw: On the left side temperature tip the scale of my thermometer, which mean it is higher than 120 deg. But after the uturn, temperature drop to 94 deg. The left side was hot, and after the uturn temperature was cool. I think the hot air turned into water at the cap, because my cap expose to the room which is cooler temperature. I took photos ad enclosed. I think I will cut the long neck of clean out #2 (take out the pipe connector which elongate the 2nd clean out). I will put roxul to cover the clean out.

3) I enclosed other photos to show that my new cob bench crack a lot, why? Last time my bench had no crack at all. Now, I just did it on Sunday, and today it already cracked a lot

4) And I added more high to my chimney.
3 years ago

I did this RMH couple months ago, in April, and I think I didn't burn it before did thermal mass. I finished everything then burned. But I think I will redo the thermal mass so I can have some heat stored. As I said before, even when the lid of the barrel go up to above 630, my thermal mass is not hot/warm at all. I checked it many time interval of 2 hours, didn't see any thing. I will do it this week, and add high to the chimney then someday when temperature is reasonable, will try to burn again to see if anything changes, will see.
3 years ago
I think I need to describe my all my problems clearly so you could diagnose my RMH:

1) From the beginning, I had exactly same problem as in the link Satamax gave: Which is at the begining my RMH burn at the tips of the wood and very nicely. But after burn for a while, my feed tube was so crazy hot that the minute I drop the firewood in, it ignited either full length or very long part of the wood (I had to wear helmet when came near the feedtube so it won't babecue my face). When I saw the link from Satamax it had my exactly problem, I thought after I cool down the top layer of the feed tube just like they did, I should be fine. But after I stripped off the insulation on second layer of feed tube, even my feedtube is not crazy hot and I had better temperature, but still have red charcoals and some burn up

2) I then changed my feed tube 2nd time: used half size bricks at bottom layer and full size bricks at second layer. Satamax and Glen advised bone dried small hardwood at first then big wood and Shilo advised more length to the chimney with cap. I already borrowed the ladder to claim up the roof and bought the cap (please take a look at the photo to see if it is ok). I don’t have any one to help get up on the roof yet. Hopefully next week.

3) Today temperature is 90 degree, but I would want to test about the wood may give red charcoal and I would want to see if changed the size of the bricks on the layer of feed tube would help my RMH. So, I burn 3 loads of small finger sized woods: First and last load with hardwood purchased from hardware stores, and middle load the same wood pick on the street and I used them previous burn. Here is what I find out:
• First load with purchased hardwood: Burn was reasonable at the tips, after burn for a while, I don’t see crazy hot feedtube ignites big part of wood as it did before, neither burn up - good
• The second load (same wood used before): it burned up, burned quick, and turned in to a whole ton of red charcoals.
• The third load, I went back to the type of wood as the first load, burn was nicely at tips: no more burn up and not much red charcoal
• After 45 minutes burns, my feedtube was reasonable hot, not crazy hot, I measured and I had only 525 degree

Here is my what I think:
• So, beside my feed tube was too hot, the wet wood or the type of wood is another reason I have burn up and red charcoal. When winter comes, I think this problem fix itself as my wood have more time to dry off
• I burned three loads, about 45 minutes, but the temperature is only 525 degree. What happen? I should be above 630. Last time after the first fix of cool down the feedtube, I burned 45 minutes and my gun gave me 630 and then after that “OH” which mean temperature was higher than 630 degree. This time it’s only 525 which is worry me a lot. What happen? Please help, 525 is not that nice

• I already insulated the 2nd and 3rd clean out, but the 3rd clean out still dripping. After stop burning for one hour, I opened the 2nd clean out, and there was water inside, little, not much to drip outside but inside there was water.
Question: If my thermal mass doesn’t have enough clay, what kind of problem it causes my RMH . I saw Paul Wheaton used only sand for his RMH. So, if sands alone is ok, then not enough clay should be ok too, right?
3 years ago

Shilo, so, it got to be on the roof where the air exhaust, right? at the 3rd clean out is not good huh? Ok, I have to think of some way to get that infor. Also, how do we measure the temperature of the air? We shoot the gun inside middle of the chimney or we shoot by the side (the metal of the chimney)? Or we put the regular thermometer inside for a few minutes?

Glen, I will try that, and also, is it normal for the RMH to have temperature falling during the burn? I thought temperature should be up and up?
3 years ago
Shilo, I am just a lousy woman, I can't claim up the roof of the house. To add more high to the chimney is a issue for me, because I have to ask my nephew to come help me with that. I try to ask him to come do it this sunday, he didn't respond yet. But then I can not burn on Sunday. I will be back home on Sunday but the temperature of my area is 90 this sunday. I don't want to burn on such a hot day, I am afraid.

About reporting the locations temperature, can I report the inside temperature at the 3rd clean out? The 3rd clean out is at the bottom of the upright chimey, so it should be not much different I hope. And the temperature of the air outside the chimney is the ouside temperature, I can put a thermometer on roof top to see.

Glen, I will follow Satamax with 2 loads of finger size, 1 load of baby arm size, and then big logs. The reason Idon't want to burn big logs because they didn't burn vigorously as skinny sticks. I notice the temperature of top of lower when I switch to big logs. Is this normal that temperature drops durning the burn? I thought the more we burn, the more the temperature rises, but I saw it drops
3 years ago