Raypak E3T Electric Pool & Spa Heater 1 Ph 27kW 240V 100-10000666

The Raypak 100-10000666 E3T is what you install when you want electric heat that holds up to saltwater and doesn't fight you on setup. At 27kW running on 240V single-phase, this is the top-end model in the E3T lineup and the one most pool owners reach for when they want real heating performance instead of a glorified spa warmer. Inside, the heating element is titanium. The housing is 316L stainless steel. Both materials are there for one reason: saltwater pools eat cheaper heaters alive, and Raypak built this one to outlast that environment. If you've replaced a cheap electric heater every few seasons, this is the upgrade. The control panel is digital, with a clear display that shows your setpoint, actual water temp, GPM flow, and any diagnostic codes. You set the temperature and the heater modulates power to hold it, so you're not paying to overshoot and cycle. A few things that matter for installation. The E3T uses a flow sensor instead of a pressure switch, with a 15 GPM minimum activation rate. No noisy contactors because the controls are solid state. Standard union connections, so it drops into most existing equipment pads without replumbing headaches. Compact footprint, around 30 lbs, which means one person can mount it. Bottom line: 27kW of single-phase electric heat, titanium where it matters, digital where it helps. Pool or spa, fresh or salt, new build or replacement.