1 The cost of a ventless gas fireplace is $500 to $2,500, and while there are additional installation costs, you may pay extra for finish work (such as a mantle, marble surround, etc.).2  Some top-of-the-line gas fireplaces may cost as much as $5,000 to $10,000 or more. 3  A gas log kit might cost $750 to $1,000 installed. Top vented gas fireplace inserts cost $750 to $3,000, and installation adds another $500 to $1,000. 2  Direct-vent gas fireplaces cost $1,000 to $3,500, plus $500 to $1,000 for installation.
Sperm can be affected by lifestyle factors such as smoking, drinking alcohol and taking drugs. There are other lifestyle factors that you may not be aware of, and they're also explained here. The good news is, once you become aware of them, they are fairly easy to avoid. It may be.
Confidence votes 26. The sperm count is dependent on the temperature of the testes. The testes are external to the body because they require a lower temperature to produce viable sperm. The testes work best at temperatures slightly less than core body temperature.Spermatogenesis is less efficient at lower and higher temperatures.This is the reason for retraction of the testes in the cold as well as non-viable sperm in men with (medically) undescended testes.he testes work best at temperatures slightly less than core body temperature. Spermatogenesis is less efficient at lower and higher temperatures. This is the reason for retraction of the testes in the cold as well as non-viable sperm in men with (medically) undescended testes.