How can heat pump water heaters be more efficient when they just use heat from heated space?
58558
Efficiency of a heat pump water heater during the winter
152278
Why does friction produce heat?
100577
How to represent kWh usage by year against average temperature?
123179
What's the true reason behind thermal expansion?
24172
Why does heat added to a system at a lower temperature cause higher entropy increase?
65065
Does increasing the pressure of the gas in a container by pumping gas into it increase temperature?
121870
Why is a temperature gradient set up in a heated rod?
24599
Is it wasteful to use a heating element, instead of doing useful work?
44171
Does visible light heat things up?
96048
Is everything 100% efficient at heating?
109067
Should a gas water heater be shut down if the water main has to be turned off?
19783
Why does a system try to minimize potential energy?
26146
Thermodynamics: heat transfer
153701
Vacuum sealing vs. water displacement method when doing longer sous vide cooking
150435
How do I make Units efficiently?
95370
How do I take the heat out of my chili?
96465
Is there a limit to how hot an object can get?