F-Series Model Btu Input Btu Output Cfm Cost/Unit S&H/Unit Ceiling Hanger Kit     25 25,000 20,000 380 $410.00 $80.00 CK8 Adapt 2 point 3/8" hanger to 2-1" threaded pipe $23.00 $6.00 50 50,000 40,000 650 $448.00 $80.00       75 75,000 60,000 980 $505.00 $80.00 CK10 Adapt 4 point 3/8" hanger to 2-1" threaded pipe $30.00 $8.00 100 100,000 80,000 1,250 $560.00 $100.00       125 125,000 100,000 1,600 $670.00 $100.00       165 165,000 132,000 2,200 $747.00 $100.00       200 200,000 160,000 2,800 $830.00 $100.00       250 250,000 200,000 3,360 $970.00 $200.00       300 300,000 240,000 3,800 $1,145.00 $200.00       400 400,000 320,000 4,940 $1,1540.00 $200.00
		F-Series > Gravity vent unit / through the roof venting > Gas connection is 1/2" for F25 to & including F250 > Gas connection is 3/4" for F300 & F400 > Natural gas units > Terminal strip connector for 24-volt wiring > Aluminized steel heat exchanger > 114-volt/ 60 hertz supply voltage > Motor with internal overload > Fan & limit safety controls > 24-volt control volatage transformer