Uncooked rice often contains the bacteria Bacillus cereus. These bacteria can form protective spores that survive the cooking process and if the rice is cooled slowly (and left between 5 Â°C and 60 Â°C for a long time), these bacteria spores can germinate, grow and produce a toxin (poison) that causes vomiting.
Obviously the colder a climate is, the more a furnace is required to run, and the shorter its life expectancy. With our relatively mild climate here in Seattle and the rest of the Puget Sound, the average life expectancy for a gas furnace is 15 to 20 years if well maintained, properly installed, and properly sized.
FACT: Heating oil systems have a longer life. The average life expectancy of an oil heat appliance is 30 or more years if they are properly maintained. The average life expectancy of a natural gas furnace is only 11-14 years. And, the efficiency ratings of new heating oil systems range from 83% to 95%.nd, converting a heating oil system to natural gas is expensive, with tank removal, chimney, plumbing and duct work potentially costing over $9,000! 2. FACT: Heating oil is a clean fuel. Today, oil produces almost zero emissions and the latest oil system technologies 'reburn' fuel, lowering emissions even further.