Energy efficiency is an important factor to consider when buying a hot tub. A significant proportion of your total cost of ownership is the running costs that keep the water at the right temperature.
There has been a sudden rise in demand for hot tubs in the UK over the last few years, and sadly with it came a rise of cheap, poorly made hot tubs by companies trying to take advantage of the trend. These companies cut corners with manufacturing and unsurprisingly, their hot tubs come with little to no insulation whatsoever. Not only does this mean their spas are more expensive to run, but they are also at risk of freezing in the winter and tend to need more repairs and maintenance in the long run.

Which hot tub brand is the most energy-efficient?
The Thermal Lock R18+ system employed by the Oasis R18 range takes energy efficiency to the next level. These hot tubs bring the best of energy-saving insulation solutions to the more affordable ranges, without compromising on quality or features.
At the Scunthorpe Hot Tub Megastore, we are passionate about hot tubs that are built to last and inexpensive to run. The Oasis brand brings not only the quality and durability consumers are looking for but also peace of mind and a lower financial and environmental burden throughout the lifetime of the spa.
What makes the Oasis Range the most energy-efficient?
The entire Oasis range comes with their innovative Thermo Lock R18+ system. This is a multi-part system designed to insulate each and every part of the hot tub body:
The Shell
It starts with the shell itself – Oasis Spas use the thickest shell available on the market: American Lucite Acrylic. Under this acrylic, we find multiple layers of resin and fibreglass composite for strength, and a layer of closed-cell foam to give an 8-10mm shell thickness. This on its own would make it better insulated than some of the higher-priced spas available in the UK!
The Base
Next is the base. The solid, no-gap base is given a 3mm layer of foam insulation, with reflective aluminium foil on each side. The cabinet walls are lined with a 15mm layer of dense PE foam complete with the same dual-sided foil on top. This acts not just to prevent the loss of heat, but to actively reflect it back into the spa cabinet and most importantly, back into the water.
The Cabinet
The entire cabinet is filled with a soft, open-cell PE foam. This provides a market-leading level of heat retention in the void of the spa cabinet. This, combined with the features mentioned above, creates a system that cleverly utilises multiple-density layers to bring the ultimate level of insulation to the spa body.
The full foam approach has the added advantage of keeping all the pipework perfectly static during transit, and adds a significant amount of structural support to the pipework infrastructure, reducing the possibility of leaks throughout the life of the spa.
The Cover
To complete the Thermal Lock R18+ system, the cover itself is improved over the standard model found on most spas with a greater density of insulating material and forms a superb seal around the top of the spa, keeping in as much of that precious heat as possible.
Temperature controlled tests showed as much as a 5% difference in heat loss between the standard and the Oasis cover. This might not seem like much, but that’s the equivalent of running the 3kW heater in your spa for an extra 15 minutes, every single day, based on a 1350L hot tub in constant ambient temperature
Ready to make your selection? Scunthorpe Hot Tubs have been leading the industry for over 8 years and have over 80 hot tubs to choose from. Why not browse our full range of hot tubs now and see if the perfect hot tub might be just a click or two away.
Prefer to speak to someone? Give us a call on 0800 808 5396 or visit our showroom and we can help you choose the best spa for you.
Showroom Address: Unit 5, Scunthorpe Eastgate Park, Queensway Industrial Estate, Scunthorpe DN16 1AE
Opening Times
Mon-Sat: 10am – 4.45pm
Sun: 10am – 4pm


