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.
Heat pump installation cost. Installation costs can be significant. Our price survey shows the cost of installation varies more than the units themselves â from $750 to $1350. Make sure the cost of installation is included in your quote. We quote uninstalled prices in our product database. Often installers are tied to a particular brand â so get more than 1 quote.