Vaporization is the process of a liquid being converted into a gas (or vapor). As propane boils, it is in the process of vaporizing. Water boils at 212 degrees Fahrenheit at which point it converts to a vapor we know as steam. Propane works the same way, but at a much lower temperature. Propane boils at -44 degrees Fahrenheit.

Because of the low vaporization temperature of propane, it is critical to understand the below vaporization chart when using propane tanks to operate heaters during cold winter days. When outside air temperatures fall to negative digits, the amount of propane vapor available within the tanks is minimal. The solution is to connect multiple propane tanks together, or to add a vaporizer. CHI Companies does rent vaporizers.

Vaporization Rate 500 Gallon Tank500 Gallon Propane Tank

Temp F
10%
20%
30%
40%
50%
60%
70%
80%
40
273,000 364,000 455,000 546,000 637,000 728,000 805,000 842,000
30
228,000 305,000 373,000 455,000 523,000 610,000 683,000 751,000
20
182,000 237,000 305,000 364,000 396,000 478,000 532,000 614,000
10
137,000 182,000 228,000 273,000 296,000 364,000 387,000 455,000
0
91,000 114,000 155,000 182,000 205,000 237,000 259,000 296,000
-10
45,000 59,000 77,000 91,000 100,000 114,000 137,000 150,000
-20
23,000 29,000 38,000 45,000 50,000 56,000 68,000 75,000



Vaporization Rate 1,000 Gallon Tank

Temp F
10%
20%
30%
40%
50%
60%
70%
80%
40
582,000 728,000 887,000 1,150,000 1,183,000 1,342,000 1,502,000 1,661,000
30
491,000 523,000 728,000 865,000 1,001,000 1,128,000 1,251,000 1,388,000
20
391,000 477,000 492,000 683,000 796,000 896,000 1,000,000 1,092,000
10
291,000 364,000 432,000 523,000 592,000 673,000 751,000 819,000
0
200,000 237,000 296,000 341,000 396,000 455,000 501,000 546,000
-10
109,000 127000 146000 182000 205,000 228,000 250,000 273,000
-20
20,000 64,000 72,000 90,000 101,000 112,000 122,000 135,000


Amount shown in the table is the total BTUH available at a given temperature and current capacity. Example: 273,000 can operate a heater with a BTUH of 273,000. Therefore you may only operate a 250,000 BTUH heater at this temperature and fill percentage of the propane tank.

VaporizerIf the temperatures you are working in are continually at or below 20 degrees Fahrenheit, you may want to use a Vaporizer. As its name implies, a Direct Fired vaporizer uses direct flame to vaporize liquid LPG inside a heat exchanger. Requiring no electricity, the Direct Fired vaporizer utilizes LPG itself as its source of energy and provides a constant supply of LPG, regardless of the LPG composition.


To view the information and specifications of our vaporizers Click Here.