الإطارمكتب هندسي
Sustainability

Designing for Jordan's Climate

بقلم Eng. Rania Haddad18 نوفمبر 20247 دقائق قراءة

A building in Amman and one on the Gulf coast face very different suns. Orientation, mass and shading do more for comfort — and running cost — than any mechanical system bolted on afterwards.

The most effective climate strategy is the one drawn before any equipment is specified. By the time a project reaches the mechanical schedule, the building's thermal behaviour is already largely fixed by its form, its orientation and the materials of its envelope. A well-oriented, well-shaded building in Jordan can carry itself through most of the year on passive measures alone; a poorly oriented one will fight its climate with an oversized chiller for the next forty summers.

Jordan is not one climate. The highlands around Amman and Irbid swing from cold, wet winters to hot, dry summers with large day-to-night temperature differences. The Jordan Valley and Aqaba are hot year-round with intense solar gain. A design that performs beautifully on one site can fail a hundred kilometres away, which is why we start every brief with the specific exposure of the plot rather than a national rule of thumb.

Orientation before equipment

The single cheapest intervention is turning the building to face the sun deliberately. In the northern hemisphere, long elevations facing roughly north and south are far easier to control than east and west ones, because high midday sun is simple to shade with a modest horizontal projection, while low morning and evening sun on east and west faces rakes straight through glass no matter how deep the overhang.

Where the plot or the street grid fixes the orientation, we shift the strategy to the plan: service spaces, stairs and stores are pushed to the hot western edge to buffer the occupied rooms behind them, and the main glazing is concentrated where it can be controlled.

Mass, shade and the night

The large day-to-night temperature swing of the highlands is an asset if the building can store it. Exposed concrete and stone soak up the day's heat slowly and release it after dark, flattening the indoor peaks. Paired with secure night ventilation, that thermal mass can reset the building each night so it starts the next day cool.

Shading is specific, not decorative. A horizontal fin sized to the latitude will block the summer sun while still letting the lower winter sun reach in to warm the floor. The same logic drives deep reveals, perforated screens and planted courtyards — all of which also soften glare, which occupants feel long before they feel temperature.

What this means for your budget

Passive decisions are nearly free at design stage and nearly impossible to retrofit later. Getting orientation, shading and mass right typically lets us downsize mechanical plant, which claws back the cost of better glazing and insulation and then keeps paying it back every month in energy. We model this trade-off explicitly rather than defaulting to the largest safe machine, so the client sees the running cost of each option, not just its capital cost.

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