XL External ThermaTub is suitable for up to 8-to-10 people. So, it is a spacious tub for your ultimate convenience. What is the difference between integrated and external heater options? The external wood-fired heater creates extra space in the fiberglass hot tub. Besides that, it hasseveral functionalities: 
 
Luxury and spacious. The biggest Thermatub product.
Optimal water consumption.
The maximum number of people.
Easy to clean.

Extras available for this hot tub:
 
Standard Package (6.500 kr):
Insulated lid.
Box stair.
Heater pipe protection.
2 Drink holders on outside wall (stainless steel).
Insulation with polyurethane foam.
Painting of wooden parts.
 
Premium Package (11.000 kr):
Underwater LED light.
Hydromassage and air bubble system with 8 jets.
Insulated lid.
Box stair.
Heater pipe protection.
2 Drink holders on outside wall (stainless steel).
Insulation with polyurethane foam.
Painting of wooden parts.
 
Deluxe Package (17.000 kr):
Underwater LED light.
Exterior LED light stripe.
Hydromassage and air bubble system with 8 jets.
Air bubble system with 12 jets.
Insulated lid.
Box stair. 
Heater pipe protection.
2 Drink holders on outside wall (stainless steel).
Insulation with polyurethane foam.
Painting of wooden parts.
 
Upgrade to Thermowood (walls and stair) +2500 kr
Upgrade to PVC (plastic walls and stair) +2500 kr
 
Other accessories available:
2 stainless steel bands 1100 kr.
Heater in AISI 316 stainless steel 1800 kr.
Sandfiltersystem with connections 4600 kr.
XL external heater 1000 kr.