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.
As mentioned, a kidney stone does not normally cause symptoms simply by sitting in the kidneys . However, stones can sometimes move through the ureter towards the bladder and begin causing issues, depending on certain factors. The symptoms of passing a kidney stone in men, for instance, can sometimes be affected by prostate size. Other factors include the actual size of the person, whether they have been able to pass kidney stones in the past, and the size of the stone itself.