Lay‑Z‑Spa energy‑efficiency

All Lay‑Z‑Spa hot tubs come with a range of highly beneficial energy‑efficient features, meticulously crafted materials, and insulating accessories as standard and at no extra cost. Independent testing by SGS shows standard Lay‑Z‑Spa hot tubs to be the most energy‑efficient inflatable hot tubs on the UK market*.

We're continuously developing our technology, construction and materials to expand our range of ultra-energy-efficient hot tubs, such as EnergySense™ and foam wall ThermaCore™, for you to have even more affordable luxury.

Industry-leading energy efficiency

The UK's most energy efficient inflatable hot tubs

Testing & results

The most energy‑efficient inflatable hot tubs

An independent study of 4 comparable products by 4 comparable brands (by SGS Laboratories) found that standard Lay‑Z‑Spa hot tubs heat faster, use less energy maintaing temperature, and are better at keeping the heat in and are therefore the most energy‑efficient inflatable hot tubs.

Laboratory tests & results* showed that:

Lay‑Z‑Spa hot tubs use less energy and are faster to heat the water to 39°C.
Lay‑Z‑Spa hot tubs use less energy to heat the water when the massage system is on.
Lay‑Z‑Spa hot tubs use less energy to maintain temperature (tested over 8 hours).
Lay‑Z‑Spa hot tubs offer significantly better insulation. When not heating, the water temperature drops faster in competitor hot tubs.
Lay‑Z‑Spa hot tubs overall use less energy and will in the long‑run cost less to run.

Detailed results can be found at the bottom of this page.

Lay-Z-Spa inflatable hot tub with thermal insulation

Up to 58.8% more energy efficient

EnergySense® inflatable hot tubs

EnergySense® hot tubs look and feel like a regular inflatable hot tub but feature a pioneering, award-winning integrated multi-layer thermal design for maximum heat retention.

Tests conducted in Germany by TÜV Rheinland found that, over a period of 73.4 hours, with an average high temperature of 39°C and an average low temperature of 15°C, the Lay-Z-Spa with EnergySense® had 58.8% less power usage Vs the same older Lay-Z-Spa without EnergySense® insulation.

More about EnergySense®

Lay-Z-Spa energy efficient foam hot tubs

Up to 63.6% more energy efficient

ThermaCore™ foam hot tubs

ThermaCore™ hot tubs are designed with thermally insulating rigid foam and include an insulating inflatable lid and top cover made of our award-winning EnergySense® insulation.

Tests conducted in Germany by TÜV Rheinland found that, over a period of 78 hours, with an average high temperature of 39°C and an average low temperature of 15°C, the Lay-Z-Spa Toronto (1,250 L) with ThermaCore™ had 63.6% less power usage than the standard Lay-Z-Spa St Moritz (1,190 L), which has no additional insulating construction material.

More about ThermaCore™

Energy-efficient features

What makes every Lay-Z-Spa energy efficient?

Out of the box, without any additional purchases, every Lay-Z-Spa has a range of energy-efficient features as follows:

Insulating Lid & Top Cover

Lay‑Z‑Spa hot tubs are more energy‑efficient than other inflatable hot tubs because they include an insulating lid with a clip‑on top cover as standard. This helps reduce the heat loss from the water's surface where most others would be exposed to the elements.

Thermostatic Heating System

Lay‑Z‑Spa’s advanced heating system, like a home central heating system, will actually stop heating when it reaches its set temperature. Only once the temperature drops a few degrees will it then turn on again. This means it is only heating when it needs to, making it a beneficial energy‑efficient feature that helps cut down those energy costs

Materials & Construction

The Beam and Drop Stitch construction of our hot tubs is complemented by the thick Lay‑Z‑Spa TriTech® material. Our premium reinforced material is used on all our hot tubs and offers superior strength and better insulation.

Power Saving Timer

The Power Saving Timer helps reduce any unnecessary energy consumption such as heating your water when you don’t need to. You can program the pump to start and stop heating when you want and set your desired temperature too.

Freeze Shield® Technology

This pioneering hot tub technology means that a Lay‑Z‑Spa hot tub can be safely kept outside all year round without the need to have a constant heat source in the water. The energy‑efficient feature automatically detects when the temperature drops below 6°C and then switches on to heat your water up to 10°C.

Energy-efficiency testing results

Lay‑Z‑Spa Vs other brands' inflatable hot tubs

Lay-Z-Spa

Heating time (20°C-39°C)
8.5 Hours

Energy Used
17.25 KWh

Cooling Speed (39°C-30°C)
0.28°C / hour

Other brand 1

Heating time (20°C-39°C)
9.25 Hours

Energy Used
17.45 KWh

Cooling Speed (39°C-30°C)
0.33°C / hour

Other brand 2

Heating time (20°C-39°C)
8.75 Hours

Energy Used
17.30 KWh

Cooling Speed (39°C-30°C)
0.39°C / hour

Other brand 3

Heating time (20°C-39°C)
13.5 Hours

Energy Used
18.7 KWh

Cooling Speed (39°C-30°C)
0.38°C / hour

Other brand 4

Heating time (20°C-39°C)
8 Hours

Energy Used
17.71 KWh

Cooling Speed (39°C-30°C)
0.31°C / hour

Heating time (20°C-39°C)
8.5 Hours

Energy Used
17.25 KWh

Cooling Speed (39°C-30°C)
0.28°C / hour

*Tests & results have been performed and produced by SGS laboratory. Above is only part of the results highlighting the most relevant information. All inflatable hot tubs were tested in a room under the same conditions with the same volume of water. Top covers and lids were used for those that provided either or both. On average, Lay‑Z‑Spa hot tubs heat 17% faster and cool down 25% slower. Lay-Z-Spa hot tubs also use less energy to heat the water and maintain temperature.

**Tests conducted in Germany by TÜV Rheinland found that, over a period of 73.4 hours, with an average high temperature of 39°C and an average low temperature of 15°C, the Lay-Z-Spa Hawaii with EnergySense® had 58.8% less power usage Vs the same older Lay-Z-Spa without EnergySense® insulation. Then, over a period of 78 hours, with an average high temperature of 39°C and an average low temperature of 15°C, the Lay-Z-Spa Toronto (1,250 L) with ThermaCore™ had 63.6% less power usage than a 2024 St Moritz (1,190 L), which is the most size-comparable inflatable Lay-Z-Spa with no additional insulating construction material.

Please note: Laboratory testing provides a controlled comparison between products. Actual household energy consumption and running costs will vary depending on factors including ambient temperature, water temperature, frequency of use, hot tub size, use of covers and accessories, electricity tariff and individual usage.

Lay-Z-Spa energy efficiency FAQs

Are all Lay-Z-Spa hot tubs energy-efficient?

All Lay-Z-Spa hot tubs, as standard, are more energy-efficient than other inflatable hot tubs on the market.

We also have a range of inflatable hot tubs with integrated thermal insulation, called EnergySense®, making them up to 58.8% more energy efficient than a regular inflatable hot tub.

You can also explore our range of non-inflatable rigid foam ThermaCore™ hot tubs that are up to 63.6% more energy-efficient than an inflatable.

How can I make my Lay-Z-Spa more energy-efficient?

There are a few simple tips and tricks to making your Lay-Z-Spa more energy-efficient.

From using one of our award-winning thermal covers to regulating when you use your heater depending on the frequency of use, you can find all the advice in this article.

Why don't you provide a Thermal Cover with all hot tubs?

Because this would significantly increase the price of every Lay-Z-Spa hot tub, and not everyone wants a thermal cover.

Do Lay-Z-Spa hot tubs cost less to run?

Our inflatable hot tubs have been tested against other leading-brand hot tubs and found to be more energy-efficient, we're positive a Lay-Z-Spa is cheaper to run than other inflatable hot tubs.

You can view sample Lay-Z-Spa running costs here. Worth noting that no other inflatable or portable hot tub brand publicly displays running costs on their websites.