Another thing that people often point to as a negative thing about ketosis is that people can suffer symptoms such as headaches and dizziness in the first few days of a ketogenic diet. Also, athletic performance can suffer until the body adapts to using fat for energy instead of glucose.
Forced air furnace heat exchangers have an average life expectancy of 15 years, with a range typically between 13 and 20 years. Most heat exchangers used in models today today will last between 15 and 25 years and are usually made from aluminized or stainless steel.
1 Propane heating systems costs less to install than oil-fueled heating systems. 2  Propane furnaces can save up to 60% in utility costs when compare d to oil or wood furnaces or electric heat pumps.3  Propane furnaces and boilers tend to last longer and require less maintenance.sing propane to power your heating system has many advantages including greater efficiency, cost savings and versatility. Plus, propane is a clean, reliable energy source, most of which is produced in the US and readily available. 1  Propane heats significantly faster and uses le s s energy than electricity.