What size heat pump do I need for 2000 sq ft home?

What size heat pump do I need for 2000 sq ft home?

around 60,000 BTU

How many tons is a 80000 BTU furnace?

4-ton

How many BTU heat pump do I need?

For every sq ft of living space, you need about 30 BTU of heating output. That means, for example, that for a 1,000 sq ft home, you would require a 30,000 BTU heat pump (that's a 2.5-ton heat pump).