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General Outdoor Furnace Discussion / Re: Ridgewood stoves
« on: January 23, 2013, 03:32:33 PM »He may have, I think the primary reason hes using tanks is he's likely getting them wayyy cheaper than having a new piece of steel rolled
He says that by reusing the propane tanks he saves us about a grand.
In regards to the heat transfer being less with the thicker firebox.... you can still get the same overall heat transfer out of a this boiler as one with a thinner firebox. Since heat transfer is per surface area I might be making it up with a bigger firebox.... I have not looked at the transfer surface area to thickness on other stoves to see how it compares. If I get some time I will do that.
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General Outdoor Furnace Discussion / Re: Ridgewood stoves
« on: January 23, 2013, 01:23:15 PM »
Yes...the original propane tank welds will not be an issue. Where I got to trust Craig (owner) is the the welding on the flue and the front panel of the firebox. The water jacket too I guess.
At $3500, sure there is some risk but I look at it as the same as buying a used car from a private person for that amount. I might get a lemon and never see the guy that sold me the car again. If I get a lemon with this boiler...I will be able to let everyone on the different forums out there know about it.
In that regard this is actually less risk...I trust someone that is trying to grow a business and reputation more that I would someone trying to sell a one time used car.
At $3500, sure there is some risk but I look at it as the same as buying a used car from a private person for that amount. I might get a lemon and never see the guy that sold me the car again. If I get a lemon with this boiler...I will be able to let everyone on the different forums out there know about it.
In that regard this is actually less risk...I trust someone that is trying to grow a business and reputation more that I would someone trying to sell a one time used car.
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General Outdoor Furnace Discussion / Re: Ridgewood stoves
« on: January 23, 2013, 01:09:36 PM »
Yep...they are propane tanks....
It is true that thicker steel transfers less heat into the water...I did not consider that but I ran some numbers...
mild steel has a thermal conductivity of 25 BTU/ft hr F....at 1/4" this is 1193 BTU/Ft^2 hr F and at 3/8" it is 795. 33% less. This matters if I am comparing two fire boxes with the same heat transfer area. The ridgewood fire box has a surface area of 35ft^2...I can transfer energy at a rate of 27400 BTU/Hr F°. If the 1/4" firebox has the same heat transfer surface are then yes...it will put more heat in the water... the ridgewood stove has a 35Ft^2 transfer area...I think that is pretty good size.
Interestingly enough...if you look at the thermo conductivity of SST at 9.25 BTU/ft hr F...a 1/4" firebox made with SST only can put out 444 BTU/Ft^2 hr F...63% less than the mild steel counter part.
It is true that thicker steel transfers less heat into the water...I did not consider that but I ran some numbers...
mild steel has a thermal conductivity of 25 BTU/ft hr F....at 1/4" this is 1193 BTU/Ft^2 hr F and at 3/8" it is 795. 33% less. This matters if I am comparing two fire boxes with the same heat transfer area. The ridgewood fire box has a surface area of 35ft^2...I can transfer energy at a rate of 27400 BTU/Hr F°. If the 1/4" firebox has the same heat transfer surface are then yes...it will put more heat in the water... the ridgewood stove has a 35Ft^2 transfer area...I think that is pretty good size.
Interestingly enough...if you look at the thermo conductivity of SST at 9.25 BTU/ft hr F...a 1/4" firebox made with SST only can put out 444 BTU/Ft^2 hr F...63% less than the mild steel counter part.
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General Outdoor Furnace Discussion / Re: Ridgewood stoves
« on: January 22, 2013, 08:23:05 AM »
I am getting a ridgewood on Monday.... What sold me is the thickness of the firebox and of course the price. When I started reading reviews and what to look for everyone said you want the thickest firebox you can afford....well it just so happens that outside the shaver boiler the ridgewood has the thickest firebox at 3/8" and the price is 3500.
I am a little concerned about the small company...but all companies start small and maybe do there best work when they are trying to build a name for themselves....
I hope I made the right choice.
I am a little concerned about the small company...but all companies start small and maybe do there best work when they are trying to build a name for themselves....
I hope I made the right choice.
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