Questions tagged [energy-efficiency]

The percentage ratio of energy produced to energy supplied to a system; or a measure of minimum energy required relative to energy actually consumed; or a measure of relative energy consumed to provide the same energy service.

1 question with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
2
votes
0answers
36 views

Is an air to water heat pump appropriate to keep a hot tub at temperature throughout the year (hot tub to run 24/7)

Is an air to water heat pump appropriate to keep a hot tub at temperature throughout the year (hot tub to run 24/7). Presumably if the efficiency is greater than 1 even at the lowest temperatures (say ...