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Can a Hot Tub Go in a Garage?

When we think of hot tubs, what comes to mind is usually outdoor hot tubs, right? But sometimes we want to soak when the weather isn’t good. In that case, can a hot tub go in a garage?

A hot tub can easily go in a garage. However, unless the garage door will be left open 24/7, the garage will need a ventilating fan and a dehumidifier. These will help ensure the excess heat and moisture do not create a mold issue inside the garage. 

The above is just the tip of what we’ll explore. Read on to get the lowdown.

In the article, we’ll check out if it’s better to have a hot tub inside or outdoor and how to properly vent the garage and keep the humidity at bay.

We’ll also explore what’s better for a garage hot tub: inflatable vs. plug and play vs. portable? And we’ll wrap up by looking at the best inflatable hot tub for a garage.

Let’s get started!

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Is it better to have a hot tub inside or outside?

Most hot tubs are kept outdoors. However, an indoor hot tub can last longer as it will not be exposed to the elements. Indoor hot tubs do require proper ventilation and humidity control to ensure mold does not become present.

And of course, it goes without saying that if it’s indoors and your hot tub develops a leak, that can also create problems if there is not an easy way to drain the excess water.

But, the truth is an outdoor hot tub is a lot easier to install and maintain.

And, you could put up a structure around it to prevent prying and noisy neighbors from seeing you and your loved ones half-naked.

A key consideration is its weight. When it’s filled with water and people, a hot tub could be up to 5000 pounds! So, it’s not something you want to put on the second or higher floors of your house and a pier and beam foundation unless you’ve had it checked out and certified to be okay by an expert.

And, hot tubs are not exactly inexpensive.

So, when you buy one, you want to minimize the costs that come with the installation. This is one of the reasons why having it outdoors is cheaper.

You don’t want to worry about the ventilation or how you’ll get it through the door, or the smell of chlorine wafting through the house. Most homes have limited space as they’re not designed for hot tubs.

That said, it’s a cinch if what you’re considering is an inflatable hot tub.

After all, it’s only after it’s indoors that you unpack and inflate it. But for hard-sided hot tubs, having an outdoor hot tub is probably better.

What are the best indoor hot tubs? In a recent article, I explored the prices and the pros and cons of the top brands Intex and Essential hot tubs.

I explained if it’s okay to put your hot tub indoors, in a basement, and how to vent a hot tub room.

Just click the link to read it on my site.

Do you need ventilation for a hot tub in a garage? 

Proper ventilation is required for a hot tub in a garage or any enclosed space. Steam is being released into the air and can be detrimental to the garage because, in time, the steam could lead to mold or mildew on surfaces inside the garage if it is poorly ventilated. 

If the garage has several large windows, you may not have much to worry about.

But, let’s face it, most garages aren’t designed to be well-ventilated. They’re conceived as places where you park your car, and some folks use them to keep stuff they’re not using much. In other words, proper ventilation is often the last thing on the builder’s mind.

You’ll need a cool fan (pun intended).

I like this one on Amazon by Genesis as it is highly innovative. It functions as an intake fan and an exhaust fan. It’s got expandable side panels, and it can fit in windows up to 37 inches, just like a window AC unit.

Each side panel can extend an additional 6.5 inches.

In total, it can span 50 inches! It’s an energy-saving device and is ETL-approved. It’s got multiple features: 2 removable stand legs, 3-speed settings, an adjustable thermostat with LED indicator lights, and 2 independent copper motors — so you could use one as an intake fan and the other for exhaust.

It’s got over 5,500 near-perfect ratings on Amazon, and almost all are 5-star. CLICK HERE to check it out on Amazon. 

How do you control humidity in a garage with a hot tub? 

For a hot tub in a garage, a dehumidifier is crucial for controlling the humidity that comes from the hot water. Without proper humidity control, in time, mold or mildew may become present and create a danger to those soaking and living in the house.

A dehumidifier is an antidote as it’s designed to remove water from the air in an enclosed place such as a garage.

A dehumidifier works like a vacuum cleaner. It sucks in air from one end, sucks the moisture out of it into a tank you have to empty now and then, and recycles the air back into the room.

I like this one by hOmelabs on Amazon.

It can remove almost 50 pints of moisture each day quickly and efficiently. It wards off allergens in large rooms and basements up to 4500 sq ft. Simply set the timer, and it works 24/7. It’s got a defrost and auto-shut-off function. Its filter can be easily removed and cleaned regularly.

It’s got almost 30,000 near-perfect ratings on Amazon!

CLICK HERE to check it out on Amazon.

What’s better for a garage hot tub: inflatable vs. plug and play vs. portable

Plug and Play hot tubs are better for a garage because they have more features than inflatable models, and unlike portable hot tubs, they do not require an electrician to connect them. But inflatable hot tubs are better if the hot tub will not be kept in place permanently.

CLICK HERE to see my pick for the best plug-and-play hot tub on Amazon.

The truth is that all 3 models are good for garages, but it depends on your needs, whether you own the home, how much money you have, and whether you’ll want the hot tub to stay in the garage indefinitely.

What are the benefits of a plug-and-play hot tub over a more permanent one?

In a recent article, I explained that inflatables and plug-and-play models could be plugged into a standard outlet, but so-called portable hot tubs, which are a lot more expensive, are not made that way. But there’s 1 crucial advantage hardwired hot tubs have over plug and play.

Just click the link to read it on my site.

If you value comfort, they are the way to go because they have many features you will love. Naturally, they are a bit more expensive than inflatable ones, but it’s better to spend a little more upfront than to have to replace an inflatable after a few years of use.

With that said, inflatable hot tubs could be the best choice if you’re on a budget or you want to test the waters before you upgrade to other models. And since the hot tub will be in a more temperature-controlled environment, it will be less effected by cold temperatures compared to if it was outside.

But if you want to go with an inflatable, are the Intex ones the best?

I devoted a recent article of mine to explore this question. In it, I reviewed the brand and explained that it is well-built and very easy to set up and maintain. It’s the best inflatable hot tub.

Just click the link to read it on my site.

What is the best inflatable hot tub for a garage?

The Intex Pure Spa is the best inflatable hot tub for a garage or any interior space. It has a built-in hard water treatment system, and it is easy and fast to set up. It comes with an easy-to-use control panel, and it has up to 140 jets. 

CLICK HERE to check it out on Amazon.

It can be set up and ready for water in about 20 minutes. So, it’s awesome if you don’t want a tub that’ll permanently take up space.

Or if you move around now and then, and you want to be easily able to take it with you. I have a permanent hot tub, and I read what he said bought one of these just to bring with me in my RV!

Let me share a list of its features. So, you’ll know why it’s Amazon’s choice product with over 1600 ratings, and most are 5-star.

  • Built-in infiltration system
  • Color-changing LED light to create an alluring ambiance
  • 2 headrests
  • Puncture-resistant 3-ply laminated material 
  • Easy-to-use, tilt-adjustable control panel
  • Insulated cover to minimize heat loss
  • Insulated ground cloth 

CLICK HERE to check it out on Amazon.

Do you have to leave the garage doors open if you have a hot tub in the garage?

No. And in fact, leaving the door open all the time can invite unwanted pests and allow excess debris to blow into the garage. Plus from a legality standpoint, it’s probably not legal to leave your garage door open all the time as small children or teens could theoretically have access to the tub when you aren’t looking.

And if someone got injured, your liability could be huge!

You just need a proper ventilation system, proper drainage, and something to control the humidity levels. You can leave the garage door open when you’re using the hot tub.

But keep it closed (and ideally locked) the rest of the time.

Does a garage have enough space for a hot tub?

Generally speaking a portable hot tub, the kind most commonly seen, is 8-foot square or maybe 10 feet square at the most. And can easily fit in half of a two-car garage.

The average garage size is 18 feet wide by 20 feet deep.

So in most cases, you can still place an 8’x8′ hot tub with 2 feet of clearance on all sides and still have an extra 10 feet of space on one side which is more than enough to park 1 car.

And if you’re worried about it, get a smaller portable hot tub or inflatable hot tub. That way you’ve got plenty of extra space for cars or storage.

I would not, however, try and put a swim spa in your garage.

Those are typically the same width as a hot tub, but can range from 12 to 21 feet in length. So unless your garage is extra large, or you don’t ever see a need to put anything else in there, I would not consider a swim spa.

Do I need a ceiling fan in my garage if I put a hot tub in there?

In short, you do need something to inhibit mildew growth and limit mold problems. But that doesn’t have to be with a ceiling fan.

In most cases, if there is already a window in the garage, a ventilation window unit like this one on Amazon by Genesis will work great and installs in minutes, unlike a ceiling fan.

If you don’t have a window, a ceiling fan could be the next best option, although being able to vent the moist air outside and prevent moisture buildup will be better.

Then just get a dehumidifier to also limit and help control excess moisture.

Pros and cons of a hot tub in a garage

Outdoor spas have a lot of advantages over putting one in the garage. Such as:

  • No need for moisture or humidity control
  • Get to enjoy the hot tub in nature
  • You can see the stars at night

That being said, there are also some advantages to putting one in your garage. These include:

  • Being able to get into the hot tub directly from the house
  • Being able to use it during thunderstorms
  • The hot tub will get less wear and tear from sun, wind, and rain
  • The concrete slab in your garage is typically perfect for a hot tub
  • Electrical connections and the main circuit breaker panel are often nearby and easily connected to
  • Better privacy (as it’s easy to open or close the garage door)
  • Easy indoor installation (since garage doors are much wider than hot tubs)

Putting a hot tub in an indoor space will always create some challenges that outdoor hot tubs won’t have.

But as long as you’ve got enough room, the garage can be a wise choice. And the garage floor is already designed to take the weight of a fully loaded hot tub. And in terms of delivery and installation, the garage door gives you easy access to putting your hot tub in place quickly and easily.

But depending on your goals, it might not be the best place.

And if your house is the same level as the hot tub leaks could be problematic compared to garage floors where the floor is stepped down from the house. And installing a floor drain will be expensive!

So, you might also consider an inflatable hot tub since that is easily moved in and out of the garage depending on the season.

How do you drain and fill out a hot tub in a garage?

This is probably the biggest challenge for those looking to make use of the hot tub in their garage.

That’s because many garages don’t have floor drains or faucets/garden hose spigots. So you do at least need a water source. Now maybe you’re lucky and the washer dryer connections are in your garage.

Or perhaps there is a hose spigot just on the outside of the garage and you can get a 50′ or 100′ hose to make filling it up easy.

In that case, for draining, I would just get a submersible pump with a long hose and then plan to drain it well away from the entrance to the garage. And if it can run all the way to the sewer drain, even better!


In this article, we checked out if it’s better to have a hot tub inside or outdoors.

And we also looked at whether you need ventilation for a hot tub in a garage and how to control humidity in a garage with a hot tub. But we also compared inflatables vs. portables vs. plug-and-play to figure out which one might be best for your situation.

And, we wrapped up by looking at the best inflatable hot tub for a garage. Luckily garage floors are perfect for hot tubs, and will not need to have much done to get them ready.

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Jeff Campbell