Check the listing for details. Raypak AVIA HD P-R264A-EN-N Natural Gas Pool Heater with NiTek Heat Exchanger. Condition: New. Listed at 3890.00 USD. Raypak AVIA Natural Gas Pool and Spa Heater with NiTek Heat Exchanger is the first and only pool heater with a built-in advanced Wi-Fi-enabled control system! You can control your AVIA pool heater settings from anywhere you are - right from your phone. Whether adjusting the water temperature or checking on other pool functions, it's all possible through the Raymote remote Wi-Fi connection. Remotely monitor your pool and spa heater from anywhere at any time. The 24/7 access allows you to have full control with the touch of a button. You can also receive real-time updates to notify you of any service or maintenance needs so your heater and pool are always ready to use! AVIA pool heaters also include smarter controls than competitors.