calentaríamos
-we would heat
The word calentaríamos is the conditional form of calentar in the first person plural.
See the full calentar conjugation

calentar

¿Cómo nos calentaríamos, nos alimentaríamos y tendríamos luz, si decidiésemos cerrar todas nuestras centrales mañana?
How would we heat, feed and provide light for ourselves if we decided to close all our power stations tomorrow?
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