Job Description for HVAC Service Technician. A heating, ventilation and air conditioning (HVAC) service technician starts an appointment with a customer by asking about any problems with the heating, ventilation, and/or air conditioning systems in the client's home or business.n HVAC service technician might also be called upon by a customer to carry out preventative maintenance tasks or inspections to ensure that heating, ventilation, and air conditioning systems continue to run smoothly.
Price: $1 million - $3 million, depending on model. Another submersible designed for in-water yacht deployment, the SEAmagine promises a stable presence on the surface as well, in case you want to get out and marvel at your yacht from a different angle.
The 22-foot-long, hand-cranked submarine was bought from its inventor Oliver Halstead. She was sea tested in 1872, but because of repeated failures, the Navy refused to commission the vessel. USS Holland (SS-1), the U.S. Navy's first commissioned submarine. An American inventor, John P. Holland, built his first steam-powered submarine in 1875. The US Navy purchased his sixth submarine on April 11, 1900, for $160,000. The 53.3-foot-long, 63-ton submarine could travel to a depth of 75 feet. It was commissioned October 12, 1900, as the USS Holland (SS-1). On the surface, the Holland was propelled by a 45-horsepower engine and could go six knots. Below the surface, the submarine relied on electric storage batteries. Holland's submarine, which held six crew, carried three torpedoes and a topside gun.