How to Choose Rentals with Bathroom Dryers, Underfloor Heating, and Mist Saunas—Understanding the Real Value and Utility Costs of Added Amenities

Added amenities in rental properties refer to installed fixtures and systems included in your lease. Beyond basic equipment like air conditioning, water heaters, and cooktops, they include comfort-enhancing amenities such as bathroom dryers, underfloor heating, mist saunas, dishwashers, and bidet toilet seats.

While these amenities improve your quality of life, they also come with increased electricity and gas costs, potential repair expenses, and ongoing maintenance requirements. Before moving in, it's important to determine whether you'll actually use each amenity and understand the real operating costs involved.

Bathroom Dryers

Functions and Uses

A bathroom dryer is an installed fixture with four functions: ventilation, heating, drying, and cooling circulation. Its most practical use is indoor laundry drying, making it especially valuable during rainy and allergy seasons and in high-rise apartments where outdoor drying is difficult.

Estimated Electricity Costs

Bathroom dryers consume 1,200–1,600 watts of power, costing approximately ¥35–50 per hour in electricity. Completely drying laundry typically takes 2–3 hours, resulting in costs of around ¥70–150 per use. This is cheaper than coin laundries (¥200–300 per use) but more expensive than outdoor drying.

When Repairs Are Needed

When a bathroom dryer in a rental property breaks, maintenance responsibility typically falls on the landlord or property management company, so repair costs are usually not borne by the tenant. However, damage caused by tenant negligence or misuse—such as failing to clean the filter—is your responsibility. Be sure to check that it operates properly when you move in.

Maintenance

The bathroom dryer filter requires regular cleaning (about once every 1–2 months). A clogged filter reduces efficiency and increases electricity costs.

Underfloor Heating

Types and Features

There are two main types of underfloor heating.

• •Electric underfloor heating — A system with electric heating cables installed beneath the floor. Installation costs are low, but operating costs (electricity) tend to be high. Power consumption is 30–60 watts per tatami mat.
• •Hydronic (hot water) underfloor heating — A system where a gas water heater circulates hot water through pipes beneath the floor. Installation costs are higher but the system is more efficient. Power consumption is low at 15–30 watts per tatami mat.

Estimated Electricity and Gas Costs

Electric underfloor heating (8 tatami mat room used 8 hours): approximately ¥200–400 per day Hydronic underfloor heating (8 tatami mats for 8 hours): approximately ¥100–200 per day (including gas)

Monthly costs often increase by around ¥5,000–10,000 during winter months.

Differences from Air Conditioning

Underfloor heating warms from the feet up and maintains uniform temperature throughout the room. Air conditioning sends warm air from above, which means feet tend to stay cold. Underfloor heating takes longer to warm up (30 minutes to 1 hour) compared to air conditioning, so you need to plan usage to match your daily routine.

Mist Saunas

Functions and Uses

A mist sauna sprays fine, warm steam into the bathroom, allowing you to enjoy sauna effects at lower temperatures (around 40–45°C). Compared to traditional dry saunas (80–100°C), it puts less strain on the body and is popular with women and seniors. Users can expect benefits such as improved skin, fatigue recovery, and relaxation, creating a spa-like experience at home.

Estimated Gas and Water Costs

One mist sauna session (20–30 minutes) costs approximately ¥50–100 in combined gas and water charges. Used three times per week, this adds approximately ¥600–1,200 to monthly utility costs.

Repair Risks and Maintenance

Mist saunas are prone to mineral deposits and mold on nozzles and pipes. Regular cleaning (about once monthly) is necessary; neglecting this leads to clogged nozzles and mold growth. This amenity is best suited for those who don't mind regular maintenance.

Guide to Choosing Added Amenities

First, Consider Whether You'll Actually Use It

Evaluate amenities based on whether you'll actually use them, not just whether they might be convenient. Bathroom dryers are essential for those who dry laundry indoors, but may be unnecessary for those who prefer outdoor drying or who own a washer-dryer.

Properties with More Amenities Tend to Have Higher Rents

Properties with extensive amenities typically have higher rents, and you may end up paying extra for amenities you don't use. Choosing properties with only the amenities you need helps optimize your costs.

Confirm Repair Responsibility Terms

Before viewing or signing a lease, confirm which repairs are the landlord's responsibility and which are yours. Typically, normal wear and tear falls to the landlord, but some contracts may make you responsible; check carefully.

Summary

Amenities like bathroom dryers, underfloor heating, and mist saunas significantly enhance living comfort, but they also increase utility costs and require ongoing maintenance. To properly evaluate amenities, confirm three things before viewing or signing a lease: "Will I actually use this?" "Can I afford the monthly cost increase?" and "Are repair responsibilities clearly defined?" Don't be swayed by the number of amenities—choose properties whose features match your lifestyle.

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