As with all hot tubs, there is a cost involved to run. However, we have added lots of clever little tricks to our hot tubs to keep running costs down. This includes a dedicated circulation pump that runs a lower ampage than a main jet pump on low speed. 100mm insulated top cover, insulated cabinet and insulated floor and acrylic shell. In January 2015 the 4500 BWA series hot tub was tested January to March for 12 weeks in a customer garden, average costs were less than £10 per week with average use of 3 times a week.