Every AlumiTub is a riveted 5052 marine-grade aluminum structure clad in Canadian Western Red Cedar, built and pressure-tested on the Sunshine Coast of British Columbia since 2001, and carries a 25 year structural warranty. The figures below apply to all three heating systems unless a row says otherwise.
Sizes and capacity
| Small | Standard | Large | |
|---|---|---|---|
| Outside diameter | 60" (5 ft, 1.5 m) | 72" (6 ft, 1.8 m) | 84" (7 ft, 2.1 m) |
| Height, standard | 38" (97 cm) | 38" | 38" |
| Height, deeper builds | 44" on Wood Fired and Hybrid; 44" or 48" (122 cm) on Electric; plus $1,000 CAD | ||
| Bench height | 13.5" standard; on a 44" Standard, two seat sections can be raised to roughly 20 to 22" | ||
| Water over the seat at the recommended fill | 21.5" on a 38" build | ||
| Water volume | 315 US gal (1,200 L) | 420 US gal (1,600 L) | 650 US gal (2,450 L) |
| Seats, Wood Fired and Hybrid | 2 to 3 | 4 to 5 | 6 to 8 |
| Seats, Electric | 3 to 4 | 5 to 7 | 9 to 10 |
Weights
| Small | Standard | Large | |
|---|---|---|---|
| Empty weight | 200 lbs (90 kg) | 220 lbs (99 kg) | 300 lbs (136 kg) |
| Packaged weight, crated on a pallet | 450 lbs (204 kg) | 551 lbs (250 kg) | 650 lbs (295 kg) |
| Filled weight, 38" build | 3,200 lbs (1,451 kg) | 5,000 lbs (2,268 kg) | 7,000 lbs (3,175 kg) |
| Filled weight, 44" and 48" builds | Add roughly 1,000 lbs (450 kg) | ||
| Crate dimensions, L x W x H | 60" x 46" x 68" | 72" x 46" x 80" | 84" x 46" x 90" |
| How it ships | Palletized on its side with accessories packed inside; the crate is wider than 46" on deeper builds | ||
| Rolls on its side through a gap of | 38" (97 cm) | ||
| Depot pickup vehicle | Pickup with a 6 ft bed and 46" between the wheel wells, or a trailer at least 4 ft by 7 ft, with two 20 ft ratchet straps | ||
Heating
| Wood Fired | Electric | Hybrid | |
|---|---|---|---|
| Heat source | Submerged firebox, the largest of its kind, welded | 240V heating coil and filtration in cedar equipment steps | Both, run alone or together |
| Heat-up from a cold fill | About 2 hours Small, 3 Standard, 5 Large | Up to 14 hours, about 3°F per hour; designed to hold or schedule, not heat on demand | Wood times, faster with both running |
| Temperature control | Stop adding wood at 95°F; water climbs to 101 to 104°F | 50 to 104°F from the touchpad or Wi-Fi app, with timer schedules; filters about 12 hours a day by default | Either; keep the fire from taking the water past 106°F |
| Overnight loss with the lid on | A few degrees; about 5°F over 12 hours around freezing (0°C, 32°F), much less in warm weather | None; holds the set point | Either |
| Fuel per soak, Standard | 1 to 2 bundles of dry hardwood; an armful a day to hold | Electricity to hold the set point, reduced by scheduling | |
| Freeze protection | None; drain, or keep the fire going, or a stock tank heater if left filled | Freeze protection mode circulates the water with the pump at about 44°F (7°C) for as long as there is power; it circulates rather than heats, and gives no protection in an outage, so drain the tub before a possible outage | |
| Cools the water | No system chills water; fill cold and leave the heat off for a cool soak | ||
| Tested heating in ambient conditions to | Minus 44°C (minus 47°F) | ||
Insulation
- 3.5" of rigid insulation beneath the base (two layers, 1.5" and 2"), required on concrete, pressure treated wood and gravel
- Full insulation wrap between the aluminum structure and the cedar cladding, 360 degrees
- Floating insulation on the water surface, under the lid
- Fabric lid 4" thick at the center tapering to 3" at the edges; cedar lid available
Power
| Wood Fired | Wood Fired with filtration | Electric and Hybrid | |
|---|---|---|---|
| Supply | None | Dedicated 15 amp grounded 120V outdoor outlet within 13 ft of the cedar equipment steps; the pump draws 2.2 amps and runs continuously at 200 W; no extension cords | Dedicated 240V, 30 amp, 4 kW circuit, 18 amp draw, typically #10-3 wire, hardwired with GFCI protection (spa box disconnect) by a certified electrician, connected at setup |
| Cold-climate heater | Optional 5.5 kW element, only for tubs heated by electricity alone, with no wood fire, in places that stay well below freezing; the standard 4 kW suits most tubs. It draws about 23 amps at 240V on its own, so it needs a larger GFCI-protected circuit than the standard 30 amp; your electrician sizes the breaker and wire from the heater specification | ||
| Conversion | Compatibility ports optional at build for adding heating or filtration later | 120V filtration converts to 240V heating with the same equipment: a replacement fuse and a hardwired GFCI connection in place of the plug-in cord | |
| Outside North America | 230V 50Hz markets use a Balboa BP200 control board and an LX WE14 50Hz pump; confirm before ordering | ||
Heating and filtration equipment, Electric and Hybrid
| Component | Dimensions |
|---|---|
| Cedar equipment steps (current design, houses the system) | 34" wide, 24" deep, 24" high, in two 12" steps |
| Custom enclosure space, if you build your own | 30" x 30" x 20", or 24" x 24" x 22" minimum with the filter canister reachable from above |
| Filter canister | 8" L x 8" W x 22" H; 50 sq ft cartridge (Cryspool 04075 or equivalent), rinsed every two weeks, soaked in The Filter Cleanser only when it no longer rinses clean or after heavy use, replaced every 3 to 4 months |
| Pump | 13" L x 7" W x 9" H; drives the single 30 gpm jet |
| Heating coil | 20" L x 3" W x 4" H; titanium coil specified at order for ocean water |
| Control box | 15" W x 8.5" H x 4" D, wall mounted within 36" of the equipment; TP200 touchpad, Balboa control |
| Touchpad | 4" x 1.25" x 1.5", on a 5 ft cord; can be mounted in a deck surface |
| Plumbing ports | Two 1.5" ports, one 8" from the base and one 10" from the rim, 20" minimum apart, anywhere except directly behind the firebox on a Hybrid; can be offset for deck framing |
| Water lines and conduit | 1.5" lines; 1.5" conduit or Teck cable |
| Remote placement | Up to 10 ft from the tub with no elevation change, in a weatherproof customer-built enclosure; PVC fittings for a permanent run |
| Bromine dispenser | In-line dispenser in the filter lid (Waterway Brominator 500-1098), two 1" tablets, three on a Large, on the lowest setting; floating dispenser on a Wood Fired without filtration |
| Anodes | Three magnesium anodes (Martyr CMR01M, 1-7/8"), fitted to the metal seat-support brackets, replaced every 3 to 4 months or at 30% remaining, on all systems with filtration |
| How long a fill lasts | 3 to 4 months with filtration; a week or two held without it; drained after each use on a fresh-fill routine; ocean fills changed every 5 to 7 days |
Firebox and chimney, Wood Fired and Hybrid
- Stainless chimney with spark-arresting cap: 58" above the tub, 96" from the ground on a 38" build
- Clearance: at least 10 ft of vertical clearance from the top of the chimney cap to anything overhanging; nothing flammable near the chimney; never during a fire ban; electrical devices at least 5 ft from the tub
- Fill line: fill to the line marked on the tub, or at least 4" above the chimney collar, before lighting, and keep the water there while the firebox is hot; on an Electric, at least 2" above the plumbing
- Cedar fence around the firebox and chimney; thermometer and ash scoop supplied
Accessories
- Drain: a drain valve is standard on every tub. The Drain Kit adds a garden hose connection stubbed out through the side, with a 1" hose and a mechanical clamp, to lead the water away
- Accessory steps: 24" wide, 20" deep, 20" high in two 10" risers
- Cedar lid, electric cedar lid, fabric lid, firebox plate, storage cover, drink tray, bottom band, Wi-Fi enablement
- All accessories ship free inside the tub when ordered with it
Water care ranges
| Reading | Range |
|---|---|
| Total alkalinity | 80 to 120 ppm, corrected first |
| pH | 7.4 to 7.8 |
| Calcium hardness | 150 to 250 ppm |
| Bromine | 2 to 3 ppm, never above 3; never chlorine, salt systems, copper or silver products; no sanitizer until cedar tannins clear, about five fills |
Materials and build
- Structure: riveted 5052 marine-grade aluminum sheet, pressure-tested with water before shipping; a marine grade protective barrier at the aluminum surface on every tub built since 2026
- Cladding: Canadian Western Red Cedar, milled on the Sunshine Coast, held by three stainless bands (top 4" from the rim, bottom 4" from the base, middle at 19")
- Firebox: welded, submerged, 5052 marine-grade aluminum like the tub
- Heating components: stainless; titanium heating coil available for ocean water
- Delivery: pre-assembled, crated on a pallet, to the nearest freight depot by default, curbside available for a fee on Small and Standard; setup in about an hour on a prepared site, plus the electrical tie-in on Electric and Hybrid
- Warranty: 25 year structural warranty on the aluminum structure
- Built on the Sunshine Coast, British Columbia, since 2001; over 10,000 tubs in service
Sizes, options and lead times are on the product pages: Wood Fired, Electric, Hybrid. The durability thinking behind these figures is in the Evermore Standard. Dimensioned site prep drawings are available from hi@alumitubs.com.