3 ms·

Only problem is you're losing a bit of efficiency because you're cooling cold air instead of warm air. If the house insulation is poor enough this strategy coul

• colechristensen 4y ago
  The efficiency will be driven by the difference in temperatures between the hot and cold side. Presumably the target temperature will swing less than the outside temperature making it always more efficient when it’s cooler outside. There is the added complication of how good your insulation is, if it’s bad it might use less energy cooling when it’s hot outside. However the driving issue isn’t really efficiency but peak power going beyond capacity. Peak usage is in the middle of the day, any off peak usage is better than near peak usage.
• elil17 4y ago
  In terms of heat rejection efficiency, unless the difference between your cold/off-peak temperature and your normal AC temperature is greater than the difference between the morning temperature and the mid-day temperature, this will not be the case. It's the difference between the indoor temperature and the outdoor temperature that drives efficiency, so you want to run the AC when these temperatures are as close together as possible. However, you do increase the rate of heat loss because there will be a larger temperature difference between the inside and the outside, so it does depend on how well insulated you are.
• Faaak 4y ago
  In the same time the heat pump efficiency is higher because of lower delta-T, so I'm not sure about your assumption