1 Time from start of nest building to departure of young is 44 to 58 days. 2  Nest building is done by both sexes and begins around April. Both parents take turns incubating three to five eggs, which hatch after 12 to 17 days.  Brood parasitism is common among cliff swallows.
Geothermal heat pumps, which pull heat from the ground making them more reliable and efficient, usually cost somewhere between $9,000 and $23,000, including installation. The price for either style of heat pump is dependent on: The heat pump brand.
Total Cost of Heat Pump Installation. Adding up the numbers, your heat pump with installation might cost as little as $2,000 or as much as $11,000. The average cost of a new heat pump installed in 2012 will run a total of $6,625.. The Size or Capacity of the Heat Pump: The larger the heat pump is, the more it will cost, within the same brand and series. They are built in whole-ton and half-ton sizes from 1.5 ton to 5.0 ton capacity for residential installation.