Product Description Aqua Cal Heatwave Heat Pumps Feature A Thermolink Titanium Heat Exchanger And Patented Counter Flow Water Management System That Heats Water Faster And More Efficiently. Impervious To Chemical Corrosion And Is Duable. Also Features A Scroll Compressor That Uses State Of The Art Technology For Highest Efficiency And Quietest Operation. Each Unit Is Microprocessor Controlled With A Digital Display That Is Accurate And Easy To Read. Includes Time And Temperature Settings And On Boardself Diagnostics. Dual Themostats Provide Independent Temperature Control For Pool And Spa. Balck Corrossion Proff Cabinet. Easy Access Panel For Ease Of Service. All Units Operate On 208/230V And Use A 40"X40" Pad (Not Included) Aqua Cal Heat Pump Limited Factory Warranty All Heat Wave Heat Pumps Have A Lifetime Warranty On The Titanium Tubing Part Of The Thermolink Titanium Heat Exchanger, A 5 Year Compressor Parts Warranty, And A 2 Year Parts & Labor Warranty To The Original Owner. Note These Warranties Are For The Continental United States Only