3 ms·
Actually, compressors use very little energy if you keep them running. They use a lot of energy when they turn on initially, after that, its very little . Ive
by Eire_Banshee 8y ago
Actually, compressors use very little energy if you keep them running.
They use a lot of energy when they turn on initially, after that, its very little . Ive been working on smart thermostats that take advantage of this phenomenon to lower HVAC costs.
- 21 8y agoSo you are saying that it's better to run a modern AC (inverter, all that) continuously on a low power than every hour or so? I'm thinking in context of cold leak (through windows, ...)
- Eire_Banshee 8y agoYes, exactly.
- jdmichal 8y agoActually, yes. The most high-efficiency central AC systems on the market use variable flow for exactly this reason. Below that are two-stage systems (low and high flow), then single-stage systems. Reliability and cost does play a part in all of this, though. [0] AFAIK, the most efficient residential systems are ductless split systems, where you basically have a centralized compressor and distributed air handlers in individual rooms. This allows for variable flow and localized control, which reduces need. [0] https://en.wikipedia.org/wiki/Seasonal_energy_efficiency_ratio#US_government_SEER_standards https://en.wikipedia.org/wiki/Seasonal_energy_efficiency_rat... > But when either replacing equipment, or specifying new installations, a variety of SEERs are available. For most applications, the minimum or near-minimum SEER units are most cost effective, but the longer the cooling seasons, the higher the electricity costs, and the longer the purchasers will own the systems, the more that incrementally higher SEER units are justified.