home heating question

[cmh_sprint]

I am in the process of finishing 2 rooms in my horse barn, 1 as a feed storage room and 1 as a tack room. I am going to install electric baseboard heaters in each room. My question is what size do I go with, 6' or 8'? After much searching of the net there appears to be a formula to determine the size and I can't find it. Room details are below.

Room #1

12' x 12'

9 ' drop ceiling with batting above

2 inside walls, 2 outside walls

inside walls have R-19 batting, outside walls have 1 1/2" polystyrene

1 door to the outside, 1 door into the barn aisle and 1 window

Room #2

12' x 12'

9 ' drop ceiling with batting above

3 inside walls, 1 outside wall

inside walls have R-19 batting, outside walls have 1 1/2" polystyrene

1 door into the barn aisle

[dorifto240]

http://www.creativehomeowner.com/index.php?pane=project&projectid=chhva047

Of the three websites I looked at, this one seemed to be the easiest to understand and appeared the most legitimate.

[that dude]

If your running strip heaters in a barn, oversize them and control each with seperate room t stats. So go 8 ft

[MidgetTodd]

Go with the biggest. You can always turn them down if it's too warm. Go too small and theres not much you can do.

[jporter12]

If your running strip heaters in a barn, oversize them and control each with seperate room t stats. So go 8 ft

This is one of the reasons we can use that dude sticking around, this is what he does.

[cmh_sprint]

Thanks everyone. That's the direction I was going but wanted some sore of sanity check.

[that dude]

Make sure you mount the t stat opposite side or as far away from the strip htr. I'm guessing no windows ? If there are, do not mount in direct sunlight either

[cmh_sprint]

Make sure you mount the t stat opposite side or as far away from the strip htr. I'm guessing no windows ? If there are, do not mount in direct sunlight either

Thanks. I knew about that part but appreciate the input just the same.

[grapesmuggler27]

Pm sent but I do hvac for a living and if you Ned a hand let me know

[Bodyman]

I would go with the 8'. It is always better to have more, than not enough!!

[that dude]

I would go with the 8'. It is always better to have more, than not enough!!

That's what she said

[that dude]

Mount your heater on the outside wall if possible as well. Forgot that.

[grapesmuggler27]

The length of the baseboard heater is what's important its the byus...if I remember correctly you will news 1000 btu per square foot

[that dude]

No way you need 144+ k btu for a 12x12 room

[grapesmuggler27]

Stupid smart phone added one to many 0's once again of I remember I'm not near my sizing chart

[that dude]

In a climate 4 zone(Ohio) you need about 50 btus percsq ft. 144x 50-7200 btus

[that dude]

In a climate 4 zone(Ohio) you need about 50 btus percsq ft. 144x 50-7200 btus

[that dude]

Sorry phones fucking up... Roughly 7000 btus are needed

[grapesmuggler27]

No I was right 100 btu per sq ft 12 x 12 room is 144 sq ft so you would want a 14000 btu I'm that room

[cmh_sprint]

Ahh..back to where I began. The concensus here is 7000+ BTU's. When I use several online calculators that factor in cubic footage and insulation quality i get andwhere from 4800 to 10000 BTU's.

[grapesmuggler27]

Easiest way call one of the hvac supply houses (united refrigeration, johmstone) tell them your room sosize and they will tell you exactly which ones to buy i don't engineer the shit i just fix of and install it

[that dude]

No I was right 100 btu per sq ft 12 x 12 room is 144 sq ft so you would want a 14000 btu I'm that room

Wrong. 50 btus per sq ft. He needs 7200 btus

[that dude]

Ahh..back to where I began. The concensus here is 7000+ BTU's. When I use several online calculators that factor in cubic footage and insulation quality i get andwhere from 4800 to 10000 BTU's.

Trust me it's not 100 btus it's 50 btus. You need a 7200 btus. But whY the fuck do I know! Grape says 100 btus per sq ft. That would mean a little 1000 sq ft home would

need a 100,000 btus. Never roughly 70,000 furnace for a 1000-1200 sq ft home. Other factors but this isn't hvac class

[grapesmuggler27]

Just spoke to our install manager depending on what temp you want to keep of at you should be able to get by with 1 8 ft unit from lowes but its.only going to to.keep it around 63 - 65 I'm those rooms with the exact specs you have

[that dude]

How can he say that. He doesn't know what model or manufact. One 8ft strip may be 8000 btus and another 6000 etc. Get the point. It calls for 7200. Buy something with min7000 max 8000 and you will be fine. I doubt he looking for 75-80 degree aire.