What Size Generator for a 2,000 Sq Ft House?

What a 2,000 Sq Ft Home Needs During an Outage

A 2,000 sq ft home typically has 3-4 bedrooms, central HVAC, a well pump or municipal water, and the usual array of appliances. During a power outage, you don't need to power everything at once — but you do need to prioritize.

The essential circuits — refrigerator, furnace fan, well pump, lights, and a few outlets — typically draw about 3,500-5,000 running watts. Adding a window AC unit or microwave brings you to 5,000-6,000W. For the whole house including central AC (3.5 ton), you're looking at 10,000-14,000W running, requiring a 14kW+ standby generator.

A 7,500W portable generator is the sweet spot for most 2,000 sq ft homes — enough for all essentials plus space for a window AC, but affordable at around $800-1,000.

Top picks for this size

7,500W vs 14,000W: Which to Choose?

• Choose 7,500W portable if: you only need essentials (fridge, furnace, well pump, lights), you're willing to manually connect via transfer switch, budget under $1,000
• Choose 14,000W standby if: you want automatic backup, need to run central AC, have medical equipment, want whole-house coverage
• Choose 22,000W standby if: you have electric heat, electric water heater, large central AC, or a home business

Frequently asked questions