The MX500 sits in the upper half of the Compass MX heat and cool pump range, which runs MX180S, MX230, MX300, MX400, MX500, MX620, MX850 and MX1000R. Each unit both heats and chills the pool, so the water stays usable through the Dubai summer as well as the cooler months. Compass supplies, installs and services the MX range and holds ready stock in Dubai.