Why are there discounts for furnace replacement in the fall?

Are there any promotions for furnace replacement in the fall? are there furnace deals in autumn? Are there good savings for replacing my furnace in the fall? Do suppliers lower prices for furnace replacements in the fall? How can I save money on my furnace replacement this fall? is it true I can save money replacing my furnace in autumn? what discounts can I expect for a furnace in fall? What discounts can I expect if I replace my furnace in autumn? What kind of deals are there for furnace replacement in fall? what's the deal with fall furnace sales? why do I get discounts on furnaces in the fall? Why do I see furnace replacement discounts in autumn? why do suppliers lower prices on furnaces in the fall? Why is fall a good time for furnace deals? why's it cheaper to replace my furnace in fall?