Hooking up Koker Lite

lsayre · Post by **lsayre** » Sun. Feb. 22, 2015 8:06 am

I just did a quick search of the blowers installed in Trane NG furnaces, and I came up with a quick rule of thumb that for every 10K of output BTU's that a Trane NG furnace has its bundled blower delivers 200CFM. 200 CFM/10K BTUH = a factor of 20 CFM per K of BTUH's.

Output BTUH = 40K
CFM for bundled blower = 20 x 40 = 800

Output BTUH = 60K
CFM for bundled blower = 20 x 60 = 1,200

Output BTUH = 80K
CFM for bundled blower = 20 x 80 = 1,600

Output BTUH = 100K
CFM for bundled blower = 20 x 100 = 2,000

Output BTUH = 120K
CFM for bundled blower = 20 x 120 = 2,400

By comparison to this measure it would seem that nearly all coal furnaces come bundled with grossly undersized blowers. But to get somewhere within the output BTUH ballpark, remember to multiply your appliances rated BTU's by 0.75.

If the Koker Lite is rated at a maximum of 105,000 BTUH of input, then its maximum output is roughly 78,750 BTUH
78.75K x 20 = 1,575 CFM for its blower

It seems to make good sense by this measure to install a 1,500 to 1,600 CFM blower on a Koker Lite.

McGiever · Post by **McGiever** » Sun. Feb. 22, 2015 8:57 am

With all the different threads appearing lately it seems that for some the best part of owning a Koker is the initial low price.

Are people buying the K _Lite who should of better off bought a K ?(160k)

lsayre · Post by **lsayre** » Sun. Feb. 22, 2015 9:01 am

McGiever wrote:With all the different threads appearing lately it seems that for some the best part of owning a Koker is the initial low price.

Lots of disappointment, that's for sure. I wonder if the Lite model can really push 8.5 lbs. of coal per hour (~200 lbs. per day). That's what it would need to be capable of pushing in order to meet its 105,000 BTUH input rating.