Heat production from gas fuels such as propane or natural gas depends on the amount of gas burned measured in cubic feet per hour. The Btu produced by the burning of the gas specifies how much heat is available for heating.
1 Symptoms of a kidney stone include flank pain (the pain can be quite severe) and blood in the urine (hematuria). 2  People with certain medical conditions, such as gout, and those who take certain medications or supplements are at risk for kidney stones.
KIDNEY STONES SYMPTOMS IN WOMEN - SYMPTOMS IN WOMEN. Kidney Stones Symptoms In Women. ( 1 kidney stone) a solid piece of material that forms from crystallization of excreted substances in the urine. ( Kidney Stone) A crystalline structure or calculus, that forms in the kidney.