Sizing a wooden hot tub

When purchasing a wooden hot tub, size should be one of your first considerations. Too often people allow the space they have available or their current budget to dictate the size of their hot tub vessel. This can often result in the purchase of a hot tub that is much larger than needed. Keep in mind that a hot tub requires constant, daily heat, and it costs the same energy to heat it whether it’s one, two or ten bathers that regularly use it.

When it comes to wooden hot tubs, 8′ diameter tubs account for less than five percent of our sales, even though many people contact us thinking this might be the size they want. The most common size for a wooden tub is either a 5×4 or 6×4 and well over ninety percent of all wooden hot tubs sold are either 5′ or 6′ in diameter, 4’ high.

One of the reasons that people prefer wooden tubs over their acrylic counterparts is because of the much greater depth, and 4′ high tubs are on average already a foot deeper than the plastic spas. It’s the depth we sell most often.
Not accounting for diameter, 5′ high wooden hot tubs amount to less than five percent of our sales, again with good reason. While it’s true that the actual inside depth is only about 4.5′ in a 5′ tub, you spend most of your time in the tub being seated, and for people of short stature and especially children, this depth can be too much.

The exception would be if you plan to do some sort of aqua-exercise in the tub, in which case we could understand the choice of a 5′ high tub. Aside from a full-blown swimming pool, there’s no better vessel for exercise than a nice deep wooden hot tub.

Just keep in mind that with an inside depth of 54″, if it’s filled all the way to the top, such a tub might have water that’s over the head of most youngsters. If children are involved, that’s one good reason to think about buying a tub no deeper than a 4’ model.

If you’re unsure about what size tub you want, you can always call, e-mail, or chat with us. It would be our privilege to help you decide what size tub would best suit your needs.

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6 Responses to “Sizing a wooden hot tub”

  1. Hot Tubs says:

    Also remember that the hot tub has to get in through the back gate. You don’t want your hot tub to not fit and then be stuck with it!

  2. admin says:

    Correct! That’s why wooden hot tubs are such a great alternative to acrylic (plastic) spas. Wooden hot tubs come in a knocked down nature, which means moving them to their final location, even if it’s through a back gate, narrow hallway or around a tight turn, poses none of the problems it would for their acrylic counterparts!

  3. Wood is the tradition fuel of choice for hot tubs. It requires between one and two wheelbarrows full of wood (one to two smashed up pallets) to bring the average hot tub up to temperature. It seems to take between four and five hours to heat up the average tub depending on size and climate. Less fuel would be required during warm summer months that in the winter when both the air temperate and the temperature of the water are lower. If the hot tub is used on consecutive days using the same water, it will still be warm so heat up again more quickly and use less wood.

  4. admin says:

    We have to take issue with your first comment that “Wood is the tradition fuel of choice for hot tubs.” We see you’re from Europe, and we know that many parts of especially Old Europe are woefully under-wired. Perhaps this is at the root of your observation.

    Here in the U.S., we have single homes that might have as much available power as an entire city block in Old Europe, so we are not prevented from using electric to heat our hot tubs. Any hot tubs here in the U.S. that aren’t heated with electric are likely heated with gas.

    While it is true that you might find that rare person here in the U.S. still using wood as a source of heat for their hot tub, this is usually someone that’s living off the electrical grid and has no power or only self-generated power.

    Keep in mind that a hot tub needs a constant supply of heat, especially in the winter months, and that using a wood fired heater for a hot tub essentially means keeping a fire burning almost all the time for it. In addition, wood heat is dirty when you consider the soot and ash that the heater produces.

    If you get a good rate on your electric or gas you probably won’t even save any money if you also have to buy the firewood, and even if you cut the wood yourself, it’s your labor rather than your money that you’ll be spending, over and over again, forever and ever, to keep that fire burning.

  5. Typically chlorine or bromine are used as sanitizers, but salt water chlorination is starting to become more common. Hot tubs should also be periodically shocked, which means oxidizing or breaking down organic material left behind from the sanitizer, as well as non-filterable material such as soap films and perspiration.

  6. admin says:

    Hi Alexander,
    While it’s true that salt water chlorination has been gaining ground, it is still chlorine. An ionizer would be a much better mode to chlorinate a tub or pool. Our ionizers can be found at the following link:

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