On: Europe drastically cut its energy consumption this...

[adrianN]

You might want to look into installing heat-exchanging ventilation.

[inglor_cz → adrianN]

In the future, possibly. As of now, my finances are rather tight, furnishing a new house from scratch is expensive.

[adrianN → inglor_cz]

There are inexpensive units that require little more than a hole in the wall.