The Lay-Z-Spa uses a pump to circulate water and an electric heater to heat the water at a rate of 2-3°F per hour.
It can take up to 24 hours to heat to the maximum temperature of 104°F.
If you want to speed up the process, fill the hot tub with warm water (not boiling!).
The included blower for air bubbles doubles as an inflator to blow up the Lay-Z-Spa.
Check out this video:
Here’s how you blow up a Lay-Z-Spa:
Never blow up your spa with a compressor as it may overpressure the inflatable walls.
The Softtub spa is a durable and lightweight inflatable hot tub made by the Softtub company. Softtub spas are well known for their efficiency and good insulation. Water pump technology called WhisperTM makes it a really quiet spa.
Lay-Z-Spa holds around 254 gal. of water, which translates to around 2100 lbs of weight.
Air Jets don’t have to be on to heat the hot tub. Actually, it’s the opposite. The jets are usually cooling the water much faster than the heater would be able to heat. That’s why some of the inflatable hot tubs can’t heat the water and run the jets at the same time.
Using a cover will greatly reduce heat losses and thus make the heating process more efficient.
The heater will have much less work to do to heat the water to the desired temperature.
The sun can help greatly with heating the water or maintaining the temperature during the day.
If we need to heat the water in Lay-Z-Spa from 68°F to 104°F it will take around 18 hours running at 1200 watts. That’s 21.6 kWh. With a price of 10 cents per kilowatt hour the total cost to heat a hot tub is around 2.2 USD for initial heating.
The ongoing costs for maintaining temperature can be around 50 USD per month greatly depending on insulation, outside temperature, and frequency of use.