Have you considered re-jigging all your floors with heating systems? Apparently, there is less heat loss through walls and ceilings with them. Plus, I've heard it heats more efficiently than if you heated the air directly as do traditional systems.
One example:
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Knowing that death is certain and that the time of death is uncertain, what's the most important thing?
—Bhikkhuni Pema Chödrön
Humankind cannot bear very much reality.
—From "Burnt Norton," Four Quartets (1936), T. S. Eliot
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