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> And yet, the Energy Saving Trust suggests that it can save 100 pounds a year even compared with a modern gas system, and much better against all other alterna
by reallydontask 7y ago
> And yet, the Energy Saving Trust suggests that it can save 100 pounds a year even compared with a modern gas system, and much better against all other alternatives
By switching to a heat pump system?
- ZeroGravitas 7y agoYep. https://www.energysavingtrust.org.uk/renewable-energy/heat/air-source-heat-pumps https://www.energysavingtrust.org.uk/renewable-energy/heat/a... See the section headed: "Potential annual savings of installing a standard air source heat pump in an average sized, four-bedroom detached home:" Also details the carbon saved, which some people might consider important as well, depends on the relative weight you place on "saving money in the near future" vs "causing the end of civilization as we know it".
- mikorym 7y agoWhat is the principle at work behind a heat pump?
- ZeroGravitas 7y agoIt's a fridge running backwards. Gasses expand soaking up heat, then you compress them and it ejects the heat. Then you repeat the cycle. You dump the heat outside if you're cooling (fridge or AC) or inside if you're heating. The slightly unintuitive bit is that you can still extract heat even from something that would feel "cold" to a human as long as there's enough of it. Making a big volume slightly colder can make a small volume much warmer (or vice versa).