It depends a little! Each set up is different, so you'll need to find the method that works for you.
Most people will be able to turn off your heat pump at your heat pump controller, maybe on your app if you're using remote controls. If you have a smart thermostat or other scheduling system, you may find it easier to set your target heating temperature low enough that your heat pump doesn't come on (e.g. 16C). So long as your thermostat is set lower than your heat pump’s ‘flow temperature’ (the temperature of the water as it leaves your heat pump to warm your pipes and radiators) your heat pump should stay off.
Don't forget to pre-heat your hot water so that you don’t run your heat pump during the event, please email and we'll help figure it out!