Warmth without waste: how to keep your Spanish home comfortable

At the bakery this morning, I overheard someone say that the air conditioner works just fine as a heater. I thought it was a joke. Regular readers already know how complicated my relationship with that device is — let’s just say we tolerate each other as long as the thermostat stays out of it. But then, how do you heat a home in Spain?

The misconception of comfort

As soon as the temperature drops below twenty degrees, you hear it everywhere: air conditioners humming, doors left open, windows shut “to keep out the draft.” Meanwhile, the electricity bill climbs as if it owns shares in your power company.

Around Málaga, heating may seem unnecessary at first glance — but that’s an illusion. In November and December, nighttime temperatures often drop to around ten degrees, and inside it can feel even colder than outdoors — thanks to thin walls, tiled floors, and the persistent lack of insulation. As a result, the air indoors feels damper than it really is. And so, we collectively reach for the air conditioner instead of a sweater.

But heating a house in Spain really doesn’t have to be complicated. The sun is your best ally — if you know how to use it. During the day, open the shutters on the sunny side and close them on the shaded side; in the evening, do the opposite. That way, you capture free warmth without noticing it on your energy bill. True comfort isn’t in devices — it’s in using what you already have, wisely.

Ventilate and retain

Smart ventilation is just as important. A short morning breeze prevents moisture problems and keeps your home fresher than running the air conditioner on “dry mode” all day. And if you want to retain warmth, use thick curtains, a wool throw, and natural, breathable materials. That’s how a Spanish home instantly feels more comfortable — even without air conditioning.

The trick isn’t to create warmth, but to keep it. That starts with habits, not technology. A cup of tea instead of an extra degree, a sweater instead of the air conditioner. Or as my British father used to say: “There’s no such thing as bad weather, only bad planning.”

Two smart, sustainable tips

• Place insulation foil behind radiators or electric panels to help reflect and retain heat more efficiently.

• Lay down bamboo or cork rugs — natural insulation that also looks great.

So yes, heating your home in Spain is allowed. Just do it with a little sense, a little sun — and preferably without picking a fight with your air conditioner.