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Speed Demon Grande
Speed Demon Grande
In Stock
Electric · 316 Marine-Grade · SpaNET

Speed Demon Grande

$17,600 NZD
Price includes GST. Freight quoted separately, crated and sent nationwide.

No cart, no checkout queue. Just email or ring us and a human sorts it.

Included: steps, insulated cover, thermal blanket, filter and the ledge of leisure.

You asked, we listened. You said “Where's the beer ledge?!” and “I need a martini mantel!”

So instead of slapping on some overpriced accessory you'll lose in a week, we built it right in. That's right. The Speed Demon Grandé comes with a custom-designed ledge of leisure, perfect for your bevvy of choice, snacks, rubber duck, or existential thoughts.

At a whopping 1.9m wide, this beast has room for all your relaxation dreams (and your mates too). It's basically a party in a tub, minus the awkward small talk. And at 800mm deep, you'll be fully submerged in pure bliss. Not just your knees.

This isn't your nana's hot tub. The Speed Demon runs on an Australian-made SpaNET electric controller, so it's smart, reliable, and knows how to handle heat like a champ. Set your ideal temp once and she holds it there. No lighting, no stoking, no waiting. Unlike a wood-fired tub, there's no countdown before a soak: she's ready when you are, day or night. (Filling from stone cold takes around 10 hours to come up to temperature, but you only do that once.)

Worried about cold nights? Don't be. The insulated cover and thermal blanket keep everything nice and toasty, so you can soak even when your driveway's frozen over.

Running it as an Airbnb?

Guest turnover is a different game from a family tub, and there's one thing worth understanding before your first booking. This tub runs ozone, which is superb at oxidising what guests leave behind, but ozone is a secondary sanitiser. It holds no residual and disappears within seconds, so it cannot keep water safe between soaks on its own. It needs a primary sanitiser underneath it.

For 316 stainless that means chlorine, kept deliberately light: sodium dichlor at around 3 ppm with pH near 7.5. Five ppm is the ceiling. Above it you start eating into the chromium oxide layer that makes the steel stainless. Test it, don't guess it. Any pool shop in the country stocks it. Perfect Pools do a 1 kg pail for about $20 and ship nationwide. Ask for spa chlorine, never pool chlorine: trichlor and cal-hypo are the wrong chemistry and the acidity pits stainless. Want to use less again? A Nature2 mineral stick in the filter housing (about $105, four months) cuts how much chlorine the water needs.

Chlorine is the one that plays nicely with an ozonator. It's what these systems are designed around, and it does the cell no harm at all. Three things we'd steer you away from. Bromine, which is specifically not recommended alongside ozone in a commercial spa, because ozone and bromide together make bromate. Chlorine-free biguanide (PHMB) systems, genuinely lovely in a tub with no ozonator, but corona-discharge ozone destroys the PHMB itself, so you'd be dosing a sanitiser that isn't there any more. And salt chlorinators, because the chloride load is hard on steel.

Look after the ozonator and it'll look after you. What kills them is plumbing, not chemistry: a check valve that sticks and lets water back up into the cell, or the clear ozone hose going yellow and brittle and splitting. Eyeball both once a year. The cell itself is a consumable, roughly two to three years on a UV lamp, three to five on a corona-discharge chip. So budget for it rather than be surprised by it.

Clean the cartridge weekly under guest use, not monthly, and keep a spare. Spas run commercially also pick up council water-quality obligations in most districts. Worth a phone call before your first booking.

We've put the lot in one place: Water Care for Short-Stay Operators (PDF), targets, dosing, the weekly routine, what not to use, and how to look after the ozone unit. Print it and stick it on the plant-room wall. Still stuck? Pick up the blower.

Made from 316 marine-grade stainless steel, she's tough as nails and built to last through every season, hangover, and mid-life crisis. And yes, steps are included, so you can enter gracefully (or dramatically, your choice).

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