What Size Generator for a 2,000 Sq Ft House?
Generator sizing for 2,000 sq ft homes: the 18 to 22kW answer, what changes it, and the surge math behind it.
The direct answer: most 2,000 sq ft homes land at 18 to 22kW for whole-home coverage including one central A/C, or 12 to 14kW for essentials only. Square footage starts the conversation; your actual equipment finishes it. Here's the math so you can see where your home lands.
Why 18 to 22kW
A typical 2,000 sq ft home runs 4 to 6kW of base load (fridge, lights, electronics, furnace fan) and its 3-ton A/C surges to roughly 9,800W at compressor start. Base load plus the surge plus 25% headroom lands you right at the 18 to 22kW class, which is why it's the most-quoted size in America for this footprint.
What moves the number
Up: a second HVAC system, electric heat or water heating, a well pump, an EV charger, or a pool. Down: gas appliances throughout, a variable-speed or soft-start A/C, or choosing essentials-only coverage with load management. Elevation matters too: at 5,000+ ft, add a size class.
Confirm it in five minutes
Text a photo of your electrical panel and your A/C's data plate to 816-785-1268 and we'll run the actual numbers free, or use the interactive sizing chart on this site. Guessing costs money in both directions: undersized trips under load, oversized wastes purchase price and fuel.
Quick Answers
Can a 14kW run a 2,000 sq ft house?
For essentials plus careful load management, often yes; for whole-home-with-A/C comfort, it's usually one class short. The A/C surge decides it.
What does 22kW cost installed?
Typically $11,000 to $15,000 all-in at nonprofit factory-direct pricing; see our cost guides by state for local detail.
Gas or electric appliances, does it matter?
Enormously: gas heat, water, and cooking can drop a home a full size class. It's the first question we ask.