حوض‌خانه

What it is

حوض‌خانه (hozkhane), literally pond house, is a covered interior room built around a shallow pool of water (حوض, hoz). In traditional Persian desert architecture it functioned as the summer living room. Air entering through windcatchers (بادگیر, badgir) passed over the water surface, cooled by evaporation, and circulated through the room. Families ate, napped, and received guests there during the hottest months.

How it works

The cooling logic is passive and elegant. Dry desert air absorbs water vapor as it crosses the pond, dropping in temperature by ten to fifteen degrees Celsius. The dense, cool air settles into the room, and the rising warm air is vented through high openings. No fans, no electricity. A well-designed hozkhane in Yazd in August can sit at twenty-two degrees while the courtyard outside hits forty-five.

The pond is usually rectangular, lined with stone or tile, and only ankle-deep. Fountains or jets break the surface to maximize evaporation. The ceiling above is often vaulted or domed and decorated with muqarnas plasterwork that disperses the cooled air.

Where they survive

The richest surviving examples sit in Yazd and Kashan, the two cities where traditional desert houses were preserved as cultural heritage rather than demolished. The Aghazadeh Mansion in Abarkuh, the Lariha House in Yazd, and the Borujerdi and Tabatabaei houses in Kashan all have intact hozkhane rooms open to visitors. Several have been adapted into boutique hotels where you can spend the night.

How to use the word

tabestan-ha dar hozkhane minashastim.

In summers we used to sit in the pond room.

تابستان‌ها در حوض‌خانه می‌نشستیم.

References

• Dehkhoda, حوض‌خانه
• Vajehyab, حوض‌خانه