Hot Tubs and Swim Spas

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Hot Tubs and Swim Spas

Running costs, siting and the base, water hygiene and using one safely

A hot tub is an appliance that runs continuously, which makes the ongoing cost and the siting more important than the purchase price.

Running costs

A tub heats and filters all year, and the bill depends on insulation, the cover, the ambient temperature and how often it is used. Ask for the insulation specification and the heater rating rather than a single headline figure.

A well-fitting, undamaged cover is the single biggest factor in running cost. A waterlogged cover costs money every day.

Siting and the base

A filled tub with people in it weighs several tonnes, so the base must be engineered for it — a reinforced concrete pad or a properly specified deck. Decking not built for the load is a genuine collapse risk.

Allow access for servicing on all sides, consider drainage, and think about noise and overlooking before choosing a spot.

Electrical supply

Most need a dedicated circuit with an RCD installed by a qualified electrician, and the work is notifiable. Never run one from an extension lead.

Water hygiene

Warm water grows bacteria quickly, including legionella, which is why sanitiser levels, filtration and regular water changes matter. Test frequently, rinse before getting in, and change the water every few months.

Using one safely

Limit sessions to fifteen or twenty minutes at around 38 degrees, never after drinking alcohol, and never alone if you have a health concern.

Anyone pregnant, with heart disease or with unstable blood pressure should speak to a doctor first. Children overheat far faster than adults and need supervision and shorter, cooler sessions.

Buying one

Check the insulation specification, the pump and heater ratings, the warranty on the shell and the plumbing, and what servicing costs. Ask to see one running rather than empty in a showroom.

Delivery access matters — a tub is craned or wheeled in and frequently will not pass through a house or a narrow gate.

Covers and lifters

A cover lifter makes daily use realistic rather than a two-person job, and a cover left half on costs heat continuously.

Neighbours

Pumps and blowers are audible, and so are people. Check where the equipment side faces and keep evening use reasonable.

Water changes and draining

Plan where several hundred litres will go when the tub is emptied, since it cannot go onto a lawn full of chemicals or into a soakaway. Let the level of sanitiser fall before draining.

Clean the shell and the filter housing while it is empty.

Covers and children

A locking cover is a drowning safeguard rather than an accessory.

WHERE TO BUY

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