Win a copy of Herbal Medicine From the Heart of the Earth this week in the Medicinal Herbs forum!

Lowell Lybarger

+ Follow
since Nov 13, 2013
Apples and Likes
Total received
In last 30 days
Total given
Total received
Received in last 30 days
Total given
Given in last 30 days
Forums and Threads
Scavenger Hunt
expand First Scavenger Hunt

Recent posts by Lowell Lybarger

Hi Everyone,

I made a new RMH this past weekend. Below are my specs followed by my questions:

---I should have all the dimensions correct for the core (H1, H1.5, H3 according to the Wisners).
---The core and riser are made of new, clean firebrick with a thinset of clayslip as recommended.
---5.25 X 5.25 dimensions for the square inches in the core's channel.
---6" duct system, 20' long in mineral soil bed for my attached greenhouse.
---Exhaust vents out the side of the greenhouse.
---Starts up no problem and exhaust moves through the system and ducts wonderfully. However...

The RMH does not heat up like I had hoped. It just gets warm, not hot, and does not convert fully to steam and CO2.

One possible problem: The distance between the riser and the top of the barrel is 2-3", not the recommended .25 of the 6" system which would be 1.5 inches.

QUESTION: How critical is the distance between the riser and the barrel an issue as per the riser getting hot enough to burn the smoke?

The riser is coated in a clayslip-perlite mixture with further insulation of 2 inches of perlite encased in sheet metal.

QUESTION: Does a new, wet RMH need a curing process before it becomes an "adult dragon"?

I've fired up this thing only once thus far. Just one time, so I'm thinking of trying it again before I dismantle it and start all over.

Many thanks to all who might respond to these questions.

6 years ago