Stop paying to heat the sky.
About 70% of a tub's heat escapes the top. So we start there: an R-40 cover held down by patented Power Clamps, an R-30 wrap around the body, and a 2″ air-chambered bottom. There's nowhere for the heat to go, so the heater barely runs.
About 70% of a tub's heat escapes the top.
Energy efficiency isn't a mystery feature buried in the equipment bay. Heat rises, and most tubs let it walk straight out the lid. So that's where we put the work first.
A weak cover means the heater is always catching up. A foam-core lid soaks up water over time, sags, and insulates less every season.
Top down, there's nowhere for the heat to go.
Cover, seal, body, and bottom all do one job: keep the heat in. The point isn't a bigger heater. It's giving the heater almost nothing to do.
R-40 top
Most heat escapes the lid, so the cover is the best-insulated part of the whole tub, where heat leaves first.
Power Clamps
Patented clamps compress a seal around the entire perimeter so the cover bites down instead of just resting on top.
R-30 body wrap
An R-30 Ecobat wrap around the body that pulls out if a tech ever needs to get inside.
Air-chambered bottom
A 2″ air-chambered bottom under a one-piece HDPE shell. No gaps, no seams, nowhere for heat to slip out.
All-in, the bigger the tub, the wider the range.
All-in means power, chemicals, and filters together, not just the heater. Smaller tubs sit lower, the largest sits higher.
| Model | Best for | All-in / month |
|---|---|---|
| E1 | Our smallest tub. Best for one to three. | Low end |
| E2 | Two seats, 200 gallons. The lightest bill we make. | Low end |
| E3 & E4 | Mid-size models land inside the same envelope. | Mid |
| E5 | Two seats with room to stretch out. | Mid–high |
| E6 | The largest and deepest, our family-size tub, power-meter measured. | $25–60 |
A boring power bill is the whole point.
We put a power meter on our largest and deepest tub, the E6. Here's what it actually drew.
"Just over a dollar a day in winter, 60 to 70 cents in summer. About $25 a month."