The Evermore Standard: Why We Engineer for Longevity

Built once, kept for life. That is the Evermore Standard, the promise behind every AlumiTub and the reason the first tubs we built in 2001 are still soaking today. It isn't a certification or a badge on the box. It's 25 years of building for properties everywhere, in every climate and on every kind of terrain, and it comes down to five things every tub is made to do.

Enduring materials

Riveted 5052 marine-grade aluminum, stainless steel and Canadian Western Red Cedar, chosen for decades of weather far harder than a backyard. The aluminum is the metal boat hulls are made from, protected by its own oxide layer, with stainless steel bands and fasteners, and magnesium anodes on every tub with filtration.

The riveted lap joints flex with every fill, drain, heat and freeze, where a weld would leave a line for a crack to follow. The cedar is banded onto the structure rather than holding the water, so a board can be refreshed while the tub carries on. Living by the ocean? Sea water fills are changed every five to seven days, and a titanium heating coil can be specified for Electric and Hybrid tubs.

Made to move

At 200 to 300 lbs empty and 38 inches on its side, an AlumiTub rolls through a gate and rides in a pickup, so it goes where life takes you: to the cabin, the new house, the island. There are no staves to dry out and nothing that has to swell back to watertight, so it can sit empty for a season and be soaking again the day you arrive.

Built to evolve alongside you

Heating is modular, never fixed. A Wood Fired built with the optional compatibility ports can take the Electric heating and filtration kit years later, so the tub you bought for an off-grid cabin becomes an Electric when the power arrives, or a Hybrid that runs both. The 120V filtration add-on converts to 240V heating with the same equipment, and an optional 5.5 kW element suits tubs that rely on electric heat alone in very cold places.

Wood for the wild, electric for every day, both for changing circumstances. Your tub moves between them without being rebuilt.

Every part within reach

Nothing hides behind sealed panels or packed foam. The heater, pump, control board and filter live inside the cedar steps beside the tub, pre-plumbed and reachable by hand. The firebox is bolted in, and the cedar is held on by stainless bands. Each part can be reached and replaced on its own, so an AlumiTub gets repaired, not replaced.

The tub itself is just as simple inside: no banks of jets, no plumbing runs, no filter chamber. On tubs with filtration, one gentle jet returns the water. Everything the water touches can be seen and rinsed, which is why it needs far less sanitizer than an acrylic spa, with no UV or ozone.

And we still supply parts for tubs built two decades ago: filters, anodes, chimney parts, bands, insulation, cedar boards, heater and pump parts. That record is what stands behind our 25 year structural warranty.

Proven everywhere

Tested heating at minus 44°C (minus 47°F), and at home on islands, mountains, lakeshores and high desert. From Chris and Susan Kelsey's tub on Thetis Island to cabins in the Rocky Mountains, farmhouses in upstate New York and Wildwood Farm in Byron Bay, Australia. Loved on more than 10,000 properties since 2001.

Your part in keeping it for life

The engineering carries most of the load. Three things are yours:

• Calcium hardness at 150 to 250 ppm. Soft water pulls at any metal, and The Purifier and the Balancers make this easy.
• pH at 7.4 to 7.8, bromine at 2 to 3 ppm. Never chlorine, salt chlorine generators, or copper or silver treatments.
• Drain before a freeze. No hot tub full of water can freeze solid without harm. Drained, an AlumiTub has nothing inside to freeze, which is why it can wait out a winter at an empty cabin. On Electric and Hybrid tubs, freeze protection runs while there is power, and on a Hybrid the fire covers an outage.

The Water Care Academy walks through the routine, and Check my water tells you what to adjust from your readings.

Why we build this way

We build for the long version of a life. A tub that can be worked on, that changes with you, and that we can still supply parts for in twenty years is worth more to the person who owns it than one that looks perfect and cannot be opened. Buy the right thing the first time, keep it for life.

Laura Andersen, Managing Director and Co-Owner, AlumiTubs

The Evermore Standard applies to every AlumiTub: the Wood Fired, the Electric and the Hybrid. How the materials were chosen is in why an aluminum structure and every hot tub material compared; the figures behind it are on the specifications page.

Common questions

What is the Evermore Standard?

AlumiTubs' own standard for longevity, summed up as built once, kept for life: enduring materials, a tub made to move, heating that evolves alongside you, every part within reach, and proven in every climate. It describes the engineering behind the 25 year structural warranty rather than a separate certification.

Can a hot tub pump or heater be replaced without replacing the tub?

On an AlumiTub, yes. The heater, pump, board and filtration are a detachable unit in the cedar steps outside the vessel, bolted and plumbed rather than built in, so each part is reached and replaced by hand. A Wood Fired built with compatibility ports can take the whole Electric kit years later.

Is an aluminum hot tub freeze-proof?

No hot tub is freeze-proof with water in it, and a freeze with water inside is not covered by warranty. What the design gives is a vessel with no internal plumbing runs, banks of jets or filter chamber, so drained and left empty it has nothing to freeze. Electric and Hybrid freeze protection runs while there is power; the external equipment is drained before a long outage or a season.

Why does an AlumiTub need less sanitizer than an acrylic spa?

Because there is nowhere inside it for biofilm to establish: no banks of jets, no internal plumbing runs, no filter chamber. Water sits in a smooth aluminum vessel, everything it touches is reachable, and a drain and rinse resets it. Bromine at 2 to 3 ppm is the whole sanitizer requirement, and no UV or ozone is fitted.