How much does a North Wave hot tub use per year?

Under the conditions selected above, from €318 to €456 per year for hot tubs, or €27 to €38 per month, and €776 to €1,059 for swim spas. The difference comes from the water surface to keep warm, and very little from the number of jets.

What costs the most in a hot tub?

Keeping the water at temperature, by a long way. Massage barely registers, because it only runs during bathing. That is why insulation matters more than equipment: a well-equipped, well-insulated hot tub uses less energy than a bare, poorly insulated one.

Does the cover really make a difference?

Yes, it is the biggest saving. Most of the heat is lost through the water's surface. A sagging, waterlogged or badly fitted cover roughly doubles surface losses, which the calculation reproduces when you choose 'Absent or worn'.

Should you lower the temperature in winter or switch the hot tub off?

Lowering the setpoint by 2 °C cuts the bill by about 8%, as the calculation shows. Switching it off completely is a false economy: you must drain it to prevent freezing, and reheating a full pool costs a good part of a month's running.

Electricity consumption

How much does a North Wave hot tub use?

The full calculation, model by model, with its assumptions shown. Change your region, your tariff and your habits: the result follows.

Hot tub

Stølen Rødberg Tønsberg Bjørgan Drøbak Tørrvika Røgaland Sørrana Øppland Sølveijg Hølen Søvik

Swim spa

Bødø 380 Førde 410 Hørten 450 Øxførd 480 Nørdland 550 Vardø 580 Øslø 600 Risør 600 Sløvika 600

Where do you live?

North and East West and Brittany Centre and Île-de-France Mountain South-West Mediterranean

Price per kilowatt-hour

€0.1696 (off-peak)€0.2016 (standard tariff)€0.2516 (high market offer)

Water temperature

33 °C 35 °C 37 °C 38 °C

Baths per week

1 3 5 7

Insulated cover

Fitted between baths Absent or tired

Sløvika 600 hot tub 6+ seats

1,059 € per year

that is €88 per month, for 5,252 kWh used. Water at 37 °C, air at an average of 12 °C, covered hot tub.

Maintaining temperature
1,1 W/°C/m² × 13,8 m² × 25 °C difference × 8,760 h
3,324 kWh
€67063 %
Circulation and filtration
250 W × 3,650 h (pump run ten hours a day)
913 kWh
€18417 %
Massage
4 kW × 20 min × 5 baths per week
347 kWh
€707 %
Two reheats
11,500 L from 12 °C to 37 °C, twice a year
669 kWh
€13513 %

The Sløvika 600 data sheet Ask for the price of the Sløvika 600

What the calculation assumes

Air at an annual average of 12 °C (Centre and Île-de-France, Météo-France normals 1991-2020).
Water maintained at 37 °C all year round.
Electricity at €0,2016 incl. VAT per kWh.
Hot tub covered between uses, cover in good condition.
A hot tub left idle in winter, drained, uses nothing but deteriorates: the calculation assumes use all year round.

The heat loss used is 1.1 W per degree of difference and per square metre of water surface, which is that of a well-insulated shell under a cover in good condition. North Wave hot tubs get triple Scandinavian insulation, rated R18 by the brand, and a 12 cm cover: we do not credit them with more than that, for lack of a measurement that says how much more. We prefer to publish these figures and have them challenged, rather than announce an amount without the reasoning behind it. See the insulation in detail.

Hot tubs, from least to most energy-hungry

Under the conditions chosen. The difference comes down to the water surface, not the number of jets.

ModelPer yearPer month
Stølen2 seats, 1,579 kWh€318€27
Tønsberg3 seats, 1,640 kWh€331€28
Rødberg3 seats, 1,705 kWh€344€29
Sørrana5 seats, 1,792 kWh€361€30
Bjørgan4 seats, 1,908 kWh€385€32
Øppland5 seats, 1,908 kWh€385€32
Drøbak4 seats, 1,927 kWh€388€32
Tørrvika4 seats, 2,127 kWh€429€36
Sølveijg5 seats, 2,130 kWh€429€36
Søvik6 seats, 2,127 kWh€429€36
Røgaland4 seats, 2,219 kWh€447€37
Hølen5 seats, 2,261 kWh€456€38

Swim spas

Under the conditions chosen. The difference comes down to the water surface, not the number of jets.

ModelPer yearPer month
Bødø 3806 seats and up, 3,847 kWh€776€65
Førde 4106 seats and up, 4,083 kWh€823€69
Hørten 4506 seats and up, 4,325 kWh€872€73
Øxførd 4806 seats and up, 4,489 kWh€905€75
Nørdland 5506 seats and up, 4,911 kWh€990€83
Vardø 5806 seats and up, 5,083 kWh€1,025€85
Risør 6006 seats and up, 5,235 kWh€1,055€88
Øslø 6006 seats and up, 5,241 kWh€1,057€88
Sløvika 6006 seats and up, 5,252 kWh€1,059€88

Frequently asked questions

How much does a North Wave hot tub use per year?: Under the conditions selected above, from €318 to €456 per year for hot tubs, or €27 to €38 per month, and €776 to €1,059 for swim spas. The difference comes from the water surface to keep warm, and very little from the number of jets.
What costs the most in a hot tub?: Keeping the water at temperature, by a long way. Massage barely registers, because it only runs during bathing. That is why insulation matters more than equipment: a well-equipped, well-insulated hot tub uses less energy than a bare, poorly insulated one.
Does the cover really make a difference?: Yes, it is the biggest saving. Most of the heat is lost through the water's surface. A sagging, waterlogged or badly fitted cover roughly doubles surface losses, which the calculation reproduces when you choose 'Absent or worn'.
Should you lower the temperature in winter or switch the hot tub off?: Lowering the setpoint by 2 °C cuts the bill by about 8%, as the calculation shows. Switching it off completely is a false economy: you must drain it to prevent freezing, and reheating a full pool costs a good part of a month's running.

Your bill, for your installation

A calculation is still a calculation: your shelter, your exposure to wind and your habits matter too. At the Richwiller showroom, we go through the figures with you, electricity contract in hand.

Write to us +33 6 83 38 22 22