Low flow square back style heater assembly for Dimension One (D-1) hot tubs and spas that utilize the M-Class control system. This 1" heater with dual titanium elements wraps around the control box and has 4 wire connections that connect to your circuit board. The circ pump connects directly to this heater via 3/4" ID vinyl lines.
The original heaters have been discontinued. The new version is a near match but some models may require a slight adjustment to the mounting. New models also now have manual hi-limit protection.
| Heater Application | Dimension One, D1, D-1 |
| Kilowatts | 5.5kW, (2.1/3.4 Dual element) |
| Low Flow Heater Assy Style | Stainless Steel |
| Heater Inlet Size | 3/4" |
| Heater Inlet Type | Barb (b) |
| Heater Outlet Size | 3/4" |
| Heater Outlet Type | Barb (b) |
