Here’s a table summarizing why you should let your wall-mounted heat pump run continuously during summer versus turning it off when you leave:  Aspect   Let It Run Continuously  Turn It Off When Leaving  Energy Efficiency  Runs at low power to maintain consistent temperature, using less energy overall.  Requires more energy to cool the house from a warmer state.  Humidity Control  Maintains low humidity for better comfort.  Allows humidity to build up, making the home feel hotter.  Wear and Tear  Reduces strain on components by avoiding frequent cycling.  Increases wear due to frequent on/off cycling.    System Design  Designed for...

If your heat pump system is rated to operate at temperatures as low as -25°C, it means the system is designed to maintain efficient heating performance down to that temperature. However, it does not necessarily stop working when the temperature drops below -25°C. Here’s what happens:  1. Performance Decline:  • Below the rated temperature, the heat pump’s ability to extract heat from the outdoor air diminishes, so its heating capacity decreases significantly.  2. Backup Heating:  • Many heat pumps include an auxiliary or backup heating system, such as electric resistance heaters or a gas furnace, to provide additional heat if...