In 1957, he made the first nonstop supersonic flight across the United States, flying from Los Angeles to New York in three hours and 23 minutes. Glenn was preceded in space by two Americans, Alan B. Shepard Jr. and Virgil I. âGusâ Grissom, and two Soviets, Yuri A. Gagarin and Gherman S. Titov. In April 1961, Gagarin was the first man in space, and his spacecraft Vostok 1 made a full orbit before returning to Earth. Less than one month later, Shepard was launched into space aboard Freedom 7 on a suborbital flight. In July, Grissom made another brief suborbital flight aboard Liberty Bell 7.
A heat pump will replace both the furnace and air conditioner/central air unit. The average cost to install a heat pump ranges from $3,949 and $6,701 depending on the size of your home and type of heat pump. Since a geothermal heat pump requires underground installation, its installation costs will be more expensive than the costs for the air-source type.
A heat pump can help both heat and cool your home, which makes it more desirable to many homeowners over choosing oil or gas heat systems. New heat pumps can save your energy bill up to 20%, which makes them a potentially money-saving option in the long term. The cost of installing a heat pump varies depending on the size and age of the home, as well as desired efficiency for the heat pump. The average installed heat pump for a 2,000 square foot home costs $2,000-$8,000. Cost breakdown