3 ms·

Well that installer cutoff was likely waaaaay too high. Your heat pump should be fine to 30F, maybe even 25F before needing gas. Modern systems are 24 SEER and

• Majromax 4y ago
  > Well that installer cutoff was likely waaaaay too high. Your heat pump should be fine to 30F, maybe even 25F before needing gas One possibility might be that the unit lacks de-icing circuitry. If that were cut for cost optimization, the unit would still work fine for cooling and for moderate-temperature heating, but anywhere near 30F it would ice up and stop working.
• bowow 4y ago
  Unfortunately only the very top-of-the-line (very expensive) variable speed compressor units are rated for anything close to 24 SEER / -5F (unless that's what you meant by modern systems).
• rudedogg 4y ago
  > Well that installer cutoff was likely waaaaay too high. Your heat pump should be fine to 30F, maybe even 25F before needing gas. The parent post was saying it's cheaper to use natural gas at those temps, so that's why the installer did the cutoff there. You can look at COP numbers for heat pumps here: https://ashp.neep.org/#!/product_list/ https://ashp.neep.org/#!/product_list/