With a heat-only boiler, some heat is wasted in the form of hot gases released from the flue. A condensing boiler captures some of the heat from these gases and uses it to heat water returning from your central heating system.
At age 18, Lewetzow has his real estate license and his first listing - a $625,000 condo in San Francisco's South of Market neighborhood. He plans to defer college and head straight to work, entering a competitive field during a deep recession.
In fact, the average age of Realtors has increased over 20 years, from age 42 in 1978 to age 50 in 2000, creating a crisis of youth in the profession. Almost a third of brokers are 60 years old, and sixteen percent of brokers are over 60.