James Chen, CMT is an expert trader, investment adviser, and global market strategist. Thomas J. Brock is a CFA and CPA with more than 20 years of experience in various areas including investing, ...

Ground or air source heat pumps are growing in popularity due to their efficiency and relatively low cost. Ground pumps use pipes to extract heat from the ground, while air pumps absorb heat from the ...

DEFINITION: A ground-source heat pump is a system that extracts natural heat from the ground using pipes which are buried under the surface. It concentrates heat by using a vapour compression cycle, ...

Heat pumps are effectively a fridge in reverse, they use electricity to extract heat from the ground, air or even water. Most homes would use an air source heat pump, which sits on the outside of a ...