The 100 and 300 Series are our entry level spas aimed at customers purchasing their first spa that are looking for a straight forward hot tub but still with solid construction at a great price. They are all 1 pump spas ( except Elegant, Luxe & Sensation ) that will run on just a standard household 13amp socket for easy low cost installation. Even our 100 & 300 Series Spas come with our great, award winning, Bluemaax insulation to give you exceptional heat retention for low running costs.