CTX’s environmentally friendly pumps are synonymous with the most advanced technology. And with savings, too. They are the cheapest way to lengthen the swimming season of an outdoor pool. They use the heat energy from air and with the help of a cooling circuit transfer the heat to the pool water at a rate of 5 kW of heat for every kW consumed. Choosing CTX means a guaranteed pool water temperature of 28º C throughout the season.