Why pellets?
Pellets are compact, easy to store, and can provide strong heat for cold outdoor water.
Pellet hot tub
Warm water, less fire tending.
Rowkai is being developed around a simple idea: use pellets for the heavy heat, then use electric heat to keep the water ready.
What is a pellet hot tub?
A hot tub that uses wood pellets as part of the heating system.
Traditional electric hot tubs use electricity for nearly all heating. Wood-fired tubs use a firebox and need more attention. Rowkai is targeting a middle path: pellet heat for the heavy lifting, electric heat for steady comfort.
Why electric too?
Electric heat is useful for holding a precise water temperature once the tub is warm.
Why now?
Owners are paying closer attention to energy use, outdoor living, cabins, and simpler products that feel less like indoor spas.
The Rowkai approach
Not a wood-fired ritual. Not electric-only.
The goal is outdoor heat that fits real life: fill the pellet cabinet, let the system do the hard part, then soak without managing logs all night.
PelletsBulk heat
WaterWarms up
ElectricHolds steady
SoakStay outside
Potential savings
Planning estimates, not guaranteed performance.
These numbers use $0.18/kWh electricity, premium pellets at $350/ton, a modern insulated tub with a quality cover, water maintained around 102–104°F, and pellets supplying about 85–90% of the heating load. Final Rowkai performance has not been validated.
Estimate
Medium tub
Large tub
Water volume
350 gal
500 gal
Full electric use
3,000–4,000 kWh/yr
4,000–5,200 kWh/yr
Full electric cost
$540–720/yr
$720–936/yr
Pellet use
1,200–1,600 lb/yr
1,600–2,100 lb/yr
Pellet cost
$210–280/yr
$280–370/yr
Electric pump + controls
$75–150/yr
$100–175/yr
Pellet-assisted total
$285–430/yr
$380–545/yr
Estimated annual savings versus full electric.
Estimated annual savings versus full electric.
Possible annual savings where electricity costs $0.25–0.40/kWh.
Cold startup from about 60°F to 104°F is estimated at 20–30 lb of pellets for a medium tub and 30–40 lb for a large tub, or roughly $4–7 in pellets at the assumptions above.
Pellet hot tub FAQ
Plain answers.
Can pellets heat a hot tub?
Yes, pellets can provide heat. Rowkai is being designed around pellet-assisted heating, not a manual wood firebox.
Can it run on electricity alone?
The target is electric temperature holding. Final electric-only behavior and recovery time will be published after validation.
What happens if pellets run out?
The intended design keeps electric heat available, but heating speed and final behavior depend on production sizing.
Is this the same as a wood-fired hot tub?
No. Wood-fired tubs usually require logs and active fire tending. Rowkai is targeting pellet-assisted heat with electric temperature control.
Will it save money?
That depends on local electric rates, pellet cost, climate, insulation, and usage. Rowkai will publish real operating targets after testing.
When can I order?
Rowkai has not announced an order date. Founder reservations are open to track demand before final specs and timing are released.