Isolation

Isolation is a block that you unlock after Solar cells.

At its base upgrade, it increases nearby cell's heat output by 5%, and for a cost of $50,000 you can increase this increment by an additional 5%.

Every upgrade costs 10x more than the last, so $50k, $500k, $5m.

Despite the upgrade being listed as a 100% increase, it actually increases the effect based on the base Isolation effectiveness and does not double it every upgrade.