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.
Of course, switching from a traditional air conditioning and furnace unit to a heat pump system is quite drastic and can carry an initial cost. Such installation requires an overhaul of your home's ventilation systems, which takes a great deal of professional labor and some expensive parts. Because of all of these factors, the average cost of heat pump system installation is around $5,000. Of course, this can vary depending on the size of your home and the type of heat pump system you are considering in the first place. The location of your home can also influence installation costs, so be sure to call around and receive quotes from multiple companies to ensure you get the best deal.