Coal Boilers
- LsFarm
- Member
- Posts: 7383
- Joined: Sun. Nov. 20, 2005 8:02 pm
- Location: Michigan
- Stoker Coal Boiler: Axeman Anderson 260
- Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
- Baseburners & Antiques: Keystone 11, Art Garland
What are you using to heat the garage floor currently?? How many BTU's ?? How well insulated, and how warm do you want the floor to get?? Is the floor unsulated under the slab, and is the perimeter insulated from the frost in the outside ground??
I used to heat my 2400 sq ft shop with two 40K BTU 40gallon hot water heaters.. I only wanted to keep the floor at 45-50*.. this gave me about 35-45* air temps... I used a waste oil heater to bring the temp up higher if I was going to be doing an all-day job..
So if you aren't trying to make the shop 70*, a 80-100K BTU boiler should do the job..More BTU's may be needed for keeping the shop at 'room' temperature.
Greg L.
I used to heat my 2400 sq ft shop with two 40K BTU 40gallon hot water heaters.. I only wanted to keep the floor at 45-50*.. this gave me about 35-45* air temps... I used a waste oil heater to bring the temp up higher if I was going to be doing an all-day job..
So if you aren't trying to make the shop 70*, a 80-100K BTU boiler should do the job..More BTU's may be needed for keeping the shop at 'room' temperature.
Greg L.
How do you do radiant floor in a slab? We're adding on to our house and this would be perfect for us!jaysonref wrote:lookin for a coal boiler that burns rice coal to heat 2500 sq ft garage with radiant heat in floor. lookin for in put.
jay
thanks!
- Yanche
- Member
- Posts: 3026
- Joined: Fri. Dec. 23, 2005 12:45 pm
- Location: Sykesville, Maryland
- Stoker Coal Boiler: Alternate Heating Systems S-130
- Coal Size/Type: Anthracite Pea
The most common method for heating a concrete slab on grade is with PEX tubing embedded in the concrete. Warm water is pumped through the tubing to heat the slab. Many important details to follow for good performance, i.e., insulation, tubing spacing, water temperature, controls, etc. If it's not a concrete slab but, conventional sub-floor over joists, there are several methods using metal plates in the floor that are first heated by the tubing. There is even a convection system that uses the much hotter hot water like that in a baseboard radiator. This is especially good for retro fit applications or where only a single room needs radiant heat.
- LsFarm
- Member
- Posts: 7383
- Joined: Sun. Nov. 20, 2005 8:02 pm
- Location: Michigan
- Stoker Coal Boiler: Axeman Anderson 260
- Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
- Baseburners & Antiques: Keystone 11, Art Garland
The pee eventualy cools, and you are left with smelly, squishy slippers..
A warm slab with ceramic tile or thin wood flooring glued down is an amazing luxury.. I would NEVER build an addtion, or build a new house without in-floor heating... the cost is quickly paid back in comfort... and savings.. a room with in-floor heat will be comfortable with air temperatures several degrees cooler than a cold floor, hot ceiling room... once experienced, there is no comparrison,.
Greg L.
A warm slab with ceramic tile or thin wood flooring glued down is an amazing luxury.. I would NEVER build an addtion, or build a new house without in-floor heating... the cost is quickly paid back in comfort... and savings.. a room with in-floor heat will be comfortable with air temperatures several degrees cooler than a cold floor, hot ceiling room... once experienced, there is no comparrison,.
Greg L.
I am an hvac contractor and the upstairs of the shop is going to be my office. the foundation and under the slab is going to be insulated. I am going to use hydro air for the second floor. and I would like to use a small indirest for demostic h20. I will keep the shop around 55 60 upstairs will be on a set back uhen not in use. in not lookin for a BTU load but more type or style of boiler. im new to coan. im puting a alaska stove furnace in my house and it burns rice coal and thats y I want to use rice coal in the boiler.
thanks for your input
jay
thanks for your input
jay
- Yanche
- Member
- Posts: 3026
- Joined: Fri. Dec. 23, 2005 12:45 pm
- Location: Sykesville, Maryland
- Stoker Coal Boiler: Alternate Heating Systems S-130
- Coal Size/Type: Anthracite Pea
There's a radiant heat floor system that's ideal for retrofits when you have access to the floor joists. It uses the convection principle to get the heat out of the plumbing but then it's converted to radiant when it heats the floor. What's great is it use high temperature water, the same water temperature as your baseboard to radiators. No need for injection mixing, etc. It's also great for rooms like kitchens where you frequently don't have enough wall space to get the needed baseboards. Take a look at:
http://www.ultra-fin.com/
I'm currently trying to analyze the design criteria for using standard baseboard heating elements instead of the flat louvered fins.
http://www.ultra-fin.com/
I'm currently trying to analyze the design criteria for using standard baseboard heating elements instead of the flat louvered fins.
I wonder how that will work under a carpeted floor?Yanche wrote:There's a radiant heat floor system that's ideal for retrofits when you have access to the floor joists. It uses the convection principle to get the heat out of the plumbing but then it's converted to radiant when it heats the floor. What's great is it use high temperature water, the same water temperature as your baseboard to radiators. No need for injection mixing, etc. It's also great for rooms like kitchens where you frequently don't have enough wall space to get the needed baseboards. Take a look at:
http://www.ultra-fin.com/
I'm currently trying to analyze the design criteria for using standard baseboard heating elements instead of the flat louvered fins.
- Yanche
- Member
- Posts: 3026
- Joined: Fri. Dec. 23, 2005 12:45 pm
- Location: Sykesville, Maryland
- Stoker Coal Boiler: Alternate Heating Systems S-130
- Coal Size/Type: Anthracite Pea
Floor coverings have a major effect on the thermal performance of any radiant floor heating system. The heat output from floors having floor coverings over 2.0 will be very marginal. All radiant floor designs should have a careful design analysis. Typical R values for floor coverings are:
Bare - 0
Asphalt or rubber tile - 0.05
1/8" sheet vinyl - 0.20
3/8" ceramic tile - 0.30
1/4" carpet glue down - 0.95
1/4" carpet over 1/4" pad - 1.44
3/4" marble - 0.42
3/8" hardwood - 0.52
1/2" hardwood - 0.70
3/4" hardwood - 1.05
Bare - 0
Asphalt or rubber tile - 0.05
1/8" sheet vinyl - 0.20
3/8" ceramic tile - 0.30
1/4" carpet glue down - 0.95
1/4" carpet over 1/4" pad - 1.44
3/4" marble - 0.42
3/8" hardwood - 0.52
1/2" hardwood - 0.70
3/4" hardwood - 1.05
- Freddy
- Member
- Posts: 7292
- Joined: Fri. Apr. 11, 2008 2:54 pm
- Location: Orrington, Maine
- Stoker Coal Boiler: Axeman Anderson 130 (pea)
- Coal Size/Type: Pea size, Superior, deep mined
So true! Even if you want a carpet with a pad, put the infloor to it and have a bit of baseboard for those extra cold days. We have some infloor, some not. One place in a carpeted hall there is a small area of tubing. I''m sure it doesn't give off a lot of heat, but if you have bare feet on the caret you sure can tell where the tubing is.LsFarm wrote:
I would NEVER build an addtion, or build a new house without in-floor heating...Greg L.
- LsFarm
- Member
- Posts: 7383
- Joined: Sun. Nov. 20, 2005 8:02 pm
- Location: Michigan
- Stoker Coal Boiler: Axeman Anderson 260
- Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
- Baseburners & Antiques: Keystone 11, Art Garland
Looking at the list of insulation factors that Yanche posted [thanks John], I'm surprised by the fairly high factor for ceramic tile, .30. And also surprised by the relatively low factors for wood flooring. .50 or so.
I would have thought that ceramic would be near to 0, since it is cemented to the concrete floor,, and is solid minerals.. like concrete.. But wood is full of air spaces, and does provide a fair amount of insulation factor... Maybe it's the fact that it is dense wood, not soft pine...
Anyway,, when I'm standing on my heated ceramic floor in front of the bathroom sink and mirror,, I shuffle around till I find the warmest spot to stand on,, a warm floor is an amazing luxury,, especially when you get out of the shower..
Greg L
I would have thought that ceramic would be near to 0, since it is cemented to the concrete floor,, and is solid minerals.. like concrete.. But wood is full of air spaces, and does provide a fair amount of insulation factor... Maybe it's the fact that it is dense wood, not soft pine...
Anyway,, when I'm standing on my heated ceramic floor in front of the bathroom sink and mirror,, I shuffle around till I find the warmest spot to stand on,, a warm floor is an amazing luxury,, especially when you get out of the shower..
Greg L
- coaledsweat
- Site Moderator
- Posts: 13761
- Joined: Fri. Oct. 27, 2006 2:05 pm
- Location: Guilford, Connecticut
- Stoker Coal Boiler: Axeman Anderson 260M
- Coal Size/Type: Pea
Put the heat tubing on top of the subfloor and cover it with cement if you want thick carpets and a pad. That is really how it should be installed, especially with new construction.