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Sizing a sauna heater
Sizing a Sauna Heater
As a general rule of thumb, a sauna heater needs 1 Kw to heat 50 cubic foot of room space. This is a general rule and an outdoor sauna or a sauna built on outside walls may need to have the heater oversized. As an example a 6'x7'x7' sauna room should require a 5 Kw heater. (252 cubic feet divide by 50 = 5.04).
Because a sauna is heating air, you will find most sauna minimize the ceiling height. A 6-7' ceiling is almost always standard. Never build a sauna in an 8 foot room as a good portion of the heat will be up in the ceiling where it is not used.
Electric Sauna heaters turn off once the desired room temperature is met. This means that a larger heater simply works less than a smaller heater so there is virtually no energy savings by purchasing an under sized sauna heater. If in doubt always go up a size.
|
Heater Sizing Chart |
|||||||
|
SIZE (Watts) |
VOLTS |
PHASE |
AMPS |
FUSING |
WIRE |
MIN |
MAX |
|
4000 |
240 |
1 |
16.7 |
30 |
10 |
100 |
150 |
|
5000 |
240 |
1 |
20.8 |
30 |
10 |
150 |
250 |
|
6000 |
240 |
1 |
25 |
40 |
8 |
200 |
300 |
|
6000 |
208 |
3 |
16.6 |
30 |
10 |
200 |
300 |
|
7500 |
240 |
1 |
31.3 |
40 |
8 |
290 |
375 |
|
7500 |
208 |
3 |
20.9 |
30 |
10 |
290 |
375 |
|
9000 |
240 |
1 |
37.5 |
50 |
8 |
360 |
450 |
|
9000 |
208 |
3 |
25 |
40 |
8 |
360 |
450 |
|
12000 |
240 |
1 |
50 |
60 |
6 |
450 |
650 |
|
12000 |
208 |
3 |
33.4 |
50 |
8 |
450 |
650 |
|
15000 |
240 |
1 |
62.5 |
80 |
4 |
600 |
800 |
|
15000 |
208 |
3 |
41.7 |
60 |
6 |
600 |
800 |
|
18000 |
208 |
3 |
50.3 |
60 |
6 |
800 |
1000 |
Standard residential voltage for North America is 240 volts, single (1) phase.