Whether it's the midday sun on a Caribbean beach or a quiet evening in a Jacuzzi, we have always associated warmth with relaxation. But have you ever wondered why?
Some research papers indicate that it seems like the science involves these TRP ion channels, especially TRPv3 and TRPv4. Temperatures from 27 degrees C up to 42 degrees C, which is pretty much what you get in a hot tub, turn on serotonergic neurons in the brainstem. Those are the same ones that make you feel good, like in other wellness stuff.
Reference:That warm fuzzy feeling: brain serotonergic neurons and the regulation of emotion
A hot tub is not only for luxury. It kind of regulates how your body and mind work. That part stands out, because we associate it with relaxation, but theres this deeper effect on brain circuits. Some treatments target those exact circuits. It feels like warmth does a lot more than we thought at first.

How It Works?
The most important features of a high-quality hot tub are: Heat, Buoyancy, and Massage.
Temperature regulation: It makes you feel warm. As mentioned in the literature, a stable temperature, such as 37°C - 40°C, will activate your TRP channels and promote the production of serotonin, which helps alleviate anxiety and stress-related disorders.
Buoyancy: It makes you feel weightless. When you are immersed in water, your weight will decrease by approximately 90%. This will relieve the joints and spine of a gentle massage, reducing the stress on your musculoskeletal system.
Therapeutic massage: The massage jets will give you a massage: Modern bathtubs use powerful pumps to mix air with water and spray it through specially designed nozzles. The arrangement of the nozzles has been meticulously designed by designers to precisely target sensitive points such as your neck, back, and feet.
What is a Hot Tub Made Of?
The Shell (Acrylic): Most premium hot tubs use high-grade Lucite Acrylic. It is durable, easy to clean, and reinforced with fiberglass for strength. It's non-porous, meaning it won't harbor bacteria.
The Cabinet (Synthetic Wood): To withstand rain, snow, and sun, the exterior is usually made of UV-resistant synthetic polymers. They look like real wood but won't rot or fade.
Insulation (The Key to Efficiency): High-density spray foam (Full Foam) or multi-layer reflective insulation is used to trap heat inside the cabinet, significantly lowering your electricity bill.
Find Your Perfect Match: For Every Family Size.
A Hot Tub seems like a big thing a lot of people might want to get for their home. Its exciting to think about buying one, but right away you wonder, how big does it need to be exactly. Getting the size right means you wont end up wasting space or energy on something too large.
Here is a simple guide based on your family size.
2–3 Person Hot Tub

For smaller setups, like if its just you or you and a partner, the 2-3 person hot tub make sense. They feel cozy, kind of private. These fit on a little patio or even a balcony without taking up too much room. They heat up quick, and they dont use as much water or power, which is nice. Its good for a quiet night in, maybe romantic, or just soaking alone after a tough day. That part stands out, how simple they are.
4–6 Person Hot Tub
Then there are the 4-6 person hot tub ones, which seem popular for families. Like parents and a few kids, or if you have friends over sometimes for a chat. You get different seats, with jets that hit your back or legs in various ways. Everyone has space for legs, no bumping around. It feels comfortable, I think, for regular use.

7–9 Person Hot Tub

Bigger families or people who host parties might go for 7-9 person hot tub. They are huge, really the center of attention at gatherings. Powerful pumps and lots of jets for massages. Not just sitting in water, more like a spot for fun. Plenty of room to stretch, everyone has their own space sort of.
Thinking about lifestyle helps pick the right one, like your daily routine and how many use it together usually. Some see smaller as better for privacy, others want room for more. It gets a bit messy figuring that out sometimes.
If your backyard layout is tricky, or youre not sure on a model, reaching out for advice could help.

Bella Tian
sales03@spasrelax.com 8613692239199
Related Articles
The information about the HOT TUB that you might be interested in.
01
When immersed in the warm water, you can disconnect, decompress and emerge renewed. For a few precious moments, you can feel like all is right in the world.

02
Why Should You Buy Spa from Sparelax but Not Other Chinese Manufacturers?
As a professional who has been engaged in the production and sales of hot tubs for more than 17 years, I will use a few articles to reveal to you some information that even spa dealers may not know.


Become our Hot Tub Dealer !
Our factory takes up 20,000 square meters, which is a lot of space for everything. There are several workshops inside, and they have these advanced production lines set up for making spas that are supposed to be high quality.
The production team gets led by experienced engineers and some experts, and those people make sure things stay professional when it comes to designing the products, checking quality, and doing research and development. Our spas have to meet international standards for electrical safety, I think that is important.
We follow the 5S concepts along with the ISO9001 standard to build their quality management system. All the spas get approved under things like CE, CB, KC, SAA, and also IEC and ISO9001. That covers a bunch.
Up to now, exports have gone to places like France and Germany, the Netherlands, Belgium, Sweden, and Australia, among others.
