A traditional sauna heats the air to 80–100 °C (176–212 °F): you sweat from the hot air and the steam when you throw water on the stones. An infrared sauna warms your skin and body directly while the air stays around 45–65 °C (113–149 °F).
So we never compare their temperatures head to head in the score: each is rated against the heat it is made for (194 °F / 90 °C for traditional, 149 °F / 65 °C for infrared). Most long-term research on sauna and health comes from traditional Finnish saunas.
✓ better figure
Heat
Heat source
Electric stove with stones
Infrared panels, full spectrum (near, mid, far) + red light
Max temperature
230 °F (110 °C)maker’s figure
171 °F (77 °C)highest setting, not reached in use
Heat-up time
Not published
Not published
Heater power
6 kW
Not published
Steam (water on stones)
Yes
No
Materials and health
Wood inside
Cedar
Eucalyptus
Wood outside
Cedar
Eucalyptus
Inside surfaces
Wood, finish not published
Wood, finish not published
EMF at the seat
No infrared panels
under 1 mGmaker’s figure
Wall thickness
0.75 in (19 mm)
Not published
Build and warranty
Warranty
2 years
7 years
Safety listing
Not published
Not published
Size and setup
Seats
5 people
2 people
Where
Outdoors
Indoors
Size (W × D × H)
68 × 71 × 95 in (173 × 180 × 241 cm)
44 × 42 × 78 in (111 × 106 × 199 cm)
Weight
Not published
Not published
Electrical
Dedicated circuit240 V / 30 A (NEMA L14-30 plug)
Not published
Heater included
Yes
Yes
Assembly
2 people, about 3 h
Not published
Price and reviews
Price
$12,990≈ €11,300
$12,999≈ €11,310
Customer reviews
4.8/5 · 33 reviews (plunge.com)
Not published
Score breakdown
Plunge SaunaSunlighten mPulse Believe
Heat · 25 %
88
88
Materials and health · 25 %
84
85
Build and warranty · 20 %
45
78
Comfort and setup · 15 %
87
65
Value for money · 15 %
40
48
Our verdict
The Sunlighten mPulse Believe scores 76/100, the Plunge Sauna 71/100.
Choose the Plunge Sauna if you want a hot, dry Finnish sauna for up to five that plugs into a 240 V outlet, indoors or out.
Choose the Sunlighten mPulse Believe if you want the most complete infrared therapy and the price is not the issue.
Infrared panels, full spectrum (near, mid, far) + red light
171 °F (77 °C)maker’s figure
Not published
0.9 kW
No
Bamboo fabric and PVCMaterial
—
Synthetic
“Low EMF” claimed, no figure
Not published
Not published
Not published
1 person
Anywhere (folds away)
33 × 33 × 46 in (84 × 84 × 117 cm)
24 lb (11 kg)
Standard outlet120 V
Yes
Not published
$1,428≈ €1,240
4.9/5 · 80 reviews (therasage.com)
Questions
Which gets hotter, the Plunge Sauna or the Sunlighten mPulse Believe?
The Plunge Sauna goes up to 230 °F (110 °C), against 171 °F (77 °C) for the Sunlighten mPulse Believe.
Which is cheaper, the Plunge Sauna or the Sunlighten mPulse Believe?
The Plunge Sauna costs about $12,990, against $12,999 for the Sunlighten mPulse Believe.
Which is better, the Plunge Sauna or the Sunlighten mPulse Believe?
The Sunlighten mPulse Believe scores 76/100, the Plunge Sauna 71/100. Choose the Plunge Sauna if you want a hot, dry Finnish sauna for up to five that plugs into a 240 V outlet, indoors or out. Choose the Sunlighten mPulse Believe if you want the most complete infrared therapy and the price is not the issue.
Infrared vs traditional: not the same heat
A traditional sauna heats the air to 80–100 °C (176–212 °F): you sweat from the hot air and the steam when you throw water on the stones. An infrared sauna warms your skin and body directly while the air stays around 45–65 °C (113–149 °F). So we never compare their temperatures head to head in the score: each is rated against the heat it is made for (194 °F / 90 °C for traditional, 149 °F / 65 °C for infrared). Most long-term research on sauna and health comes from traditional Finnish saunas.