Fire Pot Size in Common Stoves

KingCoal · Post by **KingCoal** » Mon. Jan. 13, 2014 10:41 am

maybe I can get some first hand help here. I looking at 4 stoves and want to do some capacity, burn time estimating.

i'd like to know the Dia. of the top of the fire pot ( i'll use that as close enough) and the depth (from the top to the grates )

if you know these measurements for sure please fill in the blanks

Crawford #40 BB
Dia.
Depth

Glenwood #8 BB
Dia.
Depth

Glenwood Modern Oak #118
Dia.
Depth

Glenwood Oak #40
Dia.
Depth

any comparable size Herald or Wings stove
Dia.
Depth

thanks,
steve

Sunny Boy · Post by **Sunny Boy** » Mon. Jan. 13, 2014 11:12 am

Steve,
My Glenwood Modern Oak 118 (1907). Without a firepot liner.

The firepot casting top ID is 17-1/2 inches.
Bottom ID is approx. 14 inches.
Top of the firepot to the top of the grates is 11 inches.

Sides are bell shaped, not a straight taper.

Paul

KingCoal · Post by **KingCoal** » Mon. Jan. 13, 2014 11:47 am

Paul,

i'll estimate that at 1.53 cf. or about 76.5 #'s of nut. that's just a few #'s less than my DSM 1400 with a full fire box and hopper.

if I assigned no more burn and radiant eff. to the 118 than I see from the DSM 1400 I have an idea of burn times. the obvious truth is that all of the stoves in this list will surpass that level of performance in both catagories and tells me i'm on the right track and that I should be able to run at a lower temp., than with the DSM 1400 , experience the same amount of heat "in the house" and burn for even longer time frames.

thanks,
steve

KingCoal · Post by **KingCoal** » Mon. Jan. 13, 2014 2:51 pm

that it ? no one else measured or has sales info on the size of their fire pot ?

Sunny Boy · Post by **Sunny Boy** » Mon. Jan. 13, 2014 4:45 pm

KingCoal wrote:that it ? no one else measured or has sales info on the size of their fire pot ?

Hang in there Steve - you know those base burner guys love to help out. They'll be along shortly !

Paul

KingCoal · Post by **KingCoal** » Mon. Jan. 13, 2014 6:07 pm

right, it's just that at this time of yr. I don't have much going on at work so, most of the time between my own posts i'm seriously rifling the archives thru the search feature or just surfacing from the web.

i'm in the process of deciding which stove I want to go after. efficiencies are a high priority but i'm also kind of interested in multi fuel capabilities. I have access to Bit. here too.

Sunny Boy · Post by **Sunny Boy** » Mon. Jan. 13, 2014 6:57 pm

Not sure the Glenwood Modern Oaks are able to burn bit.

However, I liked the idea of either wood, or coal, for my 118 too.

That is, ... until I read the thread about how best to clean the mica windows and ways of trying to keep them clean. And, on another thread, mention of how often that needs to be done with wood. Even if only starting a coal fire with wood verse using charcoal to keep the mica clean.

I hate cleaning windows !

So, I made up my mind to only use my firewood when we go camping, or in the outdoor fire pit !

Paul

vfw3439 · Post by **vfw3439** » Tue. Jan. 14, 2014 9:58 pm

KingCoal wrote:maybe I can get some first hand help here. I looking at 4 stoves and want to do some capacity, burn time estimating.

i'd like to know the Dia. of the top of the fire pot ( i'll use that as close enough) and the depth (from the top to the grates )

if you know these measurements for sure please fill in the blanks

Crawford #40 BB
Dia.
Depth

Glenwood #8 BB
Dia.
Depth

Glenwood Modern Oak #118
Dia.
Depth

Glenwood Oak #40
Dia.
Depth

any comparable size Herald or Wings stove
Dia.
Depth

thanks,
steve

My
Glenwood #8 BB
Dia. 18"
Depth 15 1/2 - 16"

Sunny Boy · Post by **Sunny Boy** » Wed. Jan. 15, 2014 7:07 am

Chad,
Just curious - is that 18 inch diameter with, or without, a firepot liner ?

Paul

KingCoal · Post by **KingCoal** » Wed. Jan. 15, 2014 7:14 am

thanks vfw3439,

that is a BIG stove.

looks like a 2.28 cf. fire pot capable of holding about 114#'s of coal if full.

now the interesting fact is how slow and low will that beast burn ?

the reason being it is clear that any of these stoves running at say 400* stove temp. is actually giving more radiant heat to the living space than my DSM 1400 at the same temp.

so i'm working on a chart to help me realize how big I need to go for what I want to do. it's further complicated by just how low these stoves can be run and not go out or just be spewing co / co2 from incomplete burning.

Sunny Boy · Post by **Sunny Boy** » Wed. Jan. 15, 2014 7:30 am

Steve.
I should add that my 118 will be getting a one inch thick liner when I finish it. So that will reduce the diameter by two inches, but it will also help maintain lower running temps, and should give more complete burning of the coal.

Not sure how that trade-off affects your calculations.

Also, as regards burning the CO at low temps. Looking at the pictures William posted, the Glenwood baseburners have a secondary air ring around the top of the firepot that very likely gives a more complete burn to the CO. As opposed to the door mounted "gas burner" my 118 has that is only opposite the flue pipe opening in the back.

Paul

KingCoal · Post by **KingCoal** » Wed. Jan. 15, 2014 7:40 am

Paul,

i can readily take changes like refractory lining of the pots into account, just need to know if they are present and what the measurements are with them in place.

thanks,
steve

vfw3439 · Post by **vfw3439** » Wed. Jan. 15, 2014 9:14 am

Sunny Boy wrote:Chad,
Just curious - is that 18 inch diameter with, or without, a firepot liner ?

Paul

Without the lining. 17" with the lining

vfw3439 · Post by **vfw3439** » Wed. Jan. 15, 2014 9:18 am

KingCoal wrote:thanks vfw3439,

that is a BIG stove.

looks like a 2.28 cf. fire pot capable of holding about 114#'s of coal if full.

now the interesting fact is how slow and low will that beast burn ?

the reason being it is clear that any of these stoves running at say 400* stove temp. is actually giving more radiant heat to the living space than my DSM 1400 at the same temp.

so i'm working on a chart to help me realize how big I need to go for what I want to do. it's further complicated by just how low these stoves can be run and not go out or just be spewing co / co2 from incomplete burning.

I once had an untouched/unshaken burn that lasted 48 hours while I was away. I got home shook it down, threw some coal on the fire and away it went. The temp was set around 200-250* F. Amazing stove.
Chad

EarlH · Post by **EarlH** » Wed. Jan. 15, 2014 9:34 am

My baseburner is a Favorite 261. It has a 16" firepot at the top and tapers down about an inch and is 7 1/2" deep. The magazine holds about 50 pounds of coal. It's not hard to get this one to burn 30 hours or even somewhat little longer when it's warm and I don't need much heat. I don't really know if that's what you might call a good burn time, but I'm happy with it. I know it's not in the list of stoves you are looking at, but this stove can't be that much different than most of the other types of stoves in those days. They all have seem to have similar features about them. When it was -26 out a week ago Monday, it did go through about 100 pounds of fuel in 24-30 hours! It was also really windy out that day as well. The chimney does not get too warm with this stove. Some of the stoves I've had in the past really warm the chimney up when it was really cold out.