The part number 9920-101435 is a 4.0kW, 240V heater assembly from Gecko Alliance designed for their IN.XE and IN.YE control systems and it is used by several hot tub manufacturers.
The following manufacturers use or have used this specific part number in their spas:
Spa Manufacturers
Emerald Spas: This brand often includes the Gecko IN.XE or IN.YE control packs, which use this specific heater.
Dynasty Spas: The 9920-101435 is a compatible or original replacement heater for some Dynasty Spas models.
Great Lakes Hot Tubs: This manufacturer uses the compatible Gecko M-Class, S-Class, or IN.XE systems.
Polynesian: Spas from this brand also incorporate the Gecko control systems that utilize this heater assembly.
Bullfrog Spas: Bullfrog Spas uses Balboa electronics, and part number 65-2205 is a cross-reference for this heater.
Component Suppliers
Gecko Alliance (Aeware): The original equipment manufacturer (OEM) of the heater assembly and the associated control systems (IN.XE and IN.YE series).
Therm Products / Hydro Quip: Aftermarket suppliers produce compatible versions or alternative part numbers (e.g., T9920-101435, 2-00-7022).
