VEVOR Electric SPA Heater 9KW 240V 50-60HZ Digital SPA Water Heater with Adjustable Temperature Controller Heater for Swimming Pool and Hot Bathtubs Self Modulating Pool SPA Heater with CE

No, it can be switched from Celsius to Fahrenheit.

No.

We do not sell parts separately. All our products have a 12 month warranty and if there is a problem with your purchase during the warranty period, we will send you a replacement part free of charge(Except for consumables, they need to be purchased by you yourself). Please click the following link to contact us: https://www.vevor.com/pages/contact-us.

For 9KW, the flow rate of the water pump need to be between 5,000 liters and 10,000 liters per hour.

It takes about 5 hours to heat up by 10 degrees Celsius.