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.
â¢ Heat pump: Most heat pump upgrades cost $1,000-$2,000, plus additional expenses for electrical upgrade or wiring. â¢ Hybrid / Dual fuel: Most hybrid upgrades cost $800-$1,600. Hybrid is all the benefits of the heat pump without the loss of the good heat of a gas furnace.