Oneso Heat Pump calc. To calculate the optimal Heat Pump on 10-43 kw interval for hotel, with minimal tank volume, Basic constant can also be changed on setting (see Oneso HeatPump manual on our websites techindo.co/Oneso.htm). For more info or other heat pump models please contact us. Note: the setting can be read via setting menu on android phone but not on tablet. play store link: Oneso Heat Pump Hotel Calc. Good for hotel me designer Please test it. Thanks!