Is a Radiator Better Under a Window

The traditional place to position your radiator is the coldest part of the room. Whether that’s beneath your window or against the wall. This is due to conduction, with incoming cold air causing more effective heat conduction and pushing the hot air from your radiator into the middle of the room.

Is it good to have a radiator under a window?

In old and poorly insulated houses, a radiator under the window is still necessary to combat the penetrating cold. However, that is an energy-intense solution. It is better to insulate the house thoroughly and to install double (or triple) glazing.

Does a radiator under a window cause condensation?

This can cause moisture in the air to condense out onto the window. In cold enough conditions, the window will accumulate frost or even layers of ice on the inside surface. The hot air rising off a radiator will have less tendency to deposit moisture onto the window (the glass surface will be somewhat warmer).