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I hear the question all the time - "What's it cost to own a hot tub?" The real cost of operating a spa includes a lot more than just chemicals.
In this post, we break down all of the costs in owning a hot tub, and add them all up.
What can you do with this information? Well, if you are thinking of buying a spa, or purchasing a home with a spa, you may want to know the cost of this backyard appliance.
If you already own a spa, I've included several cost savings tips, or ways to reduce your hot tub expenses.
The largest energy user is the spa pump. Two-speed pumps are designed to run on low all the time, except for a few hours per day on high during off-peak hours. You can experiment with run times, and short periods of off times, to reduce operation costs, but be sure to filter the water every day for at least 12 hours on low speed, and 30 minutes on high speed. Maintaining good water balance and sanitation levels can reduce your filtration demand.
Your spa heater is also electrical, and depending on it's size, it can draw as much amperage as the spa pump. Reducing the temperature in a spa can save money, but not much unless you keep it below 95°. A good spa cover, floating spa blanket and good levels of insulation around the spa or inside the cabinet are ways to improve heat retention, and lower consumption.
Spa blowers also consume energy, and your spa pack circuitry uses a small amount.
How much electricity will the average spa consume? Depending on a host of variables, most spas use around 2000 kWh of juice every year. The national average for electrical cost is currently 12 cents per kWh, Annual Electricity Costs - $240
Most spas need very few chemicals to maintain water quality. You'll need pH control, and some form of spa shock or oxidizer. If your water is soft, you may need to raise the calcium hardness level, and if your water is very hard or has high mineral content, you can use a stain & scale control chemical. Enzymes are a good chemical for spas that are used almost daily, by many people.
Many spas use an ozonator or mineral sanitizer. These are excellent purifiers and reduce the amount of bromine needed to keep the water sanitary. Mineral sticks last for 6 months, and ozonators usually need a 'recharge' in 18 months.
Bromine tablets are a usual expense, and a bottle of bromide booster to use after draining the spa. This builds a residual of bromide ions, which continuously convert to bromine with the addition of tablets.
Let's say you have a bromine spa, and you test it, balance and shock it twice weekly, and you use either a mineral stick or an ozonator as a secondary purifier. This is what I do, and for me, my Annual Chemical Costs - $150
I'm speaking about spa cleaning tools mainly - skim net, vacuum, hose nozzle or a pre-filter if your fill water is hard or mineral rich. These tend to last for several years, so the amortized expense may be close to Annual Tools Cost - $10
These are items that also last a long time, such as spa steps or spa furniture, which is usually a one time expense. Recurring expenses could include a thermometer or a bromine tablet floater, or waterproof playing cards. Annual Accessories Cost - $10
Spas don't normally need spa repair every year, and then you have a year that requires several hundred dollars in spa parts. At some point in the life of a hot tub, repairs are inevitable, I suppose. You may get lucky, but I would plan on Annual Parts Cost - $40
Spa covers that are well built and well maintained are likely to last 5 years on average. Spa cover prices vary, but let's say you spend $400 every 5 years for a new cover. Averaged out per annum, we have the Annual Spa Cover Cost - $80
The spa cartridge filter won't last forever. Each time they are cleaned they lose a little bit of their filtering ability. Replace your spa cartridge every 12-24 months, or after 12-15 cleanings. The cost of replacement spa filters is low in most cases. At $20 a pop, every 18 months, the Annual Spa Filter Cost - $12
The cost of city water varies dramatically around the country, but if your average monthly water bill is $50, and you drain your spa every 3 months, your spa is only using 1-2% of your total household use. Annual Fill Water Cost - $8
Of course, your mileage may vary, depending on the variables such as the size of your spa, climate, how much it's used, how hot you keep it, how well insulated your spa is ... your total cost of ownership for a spa or hot tub could vary either way by $100 or more.