What size generator do I need for a typical Houston home?

For a home between 1,800 and 3,500 square feet, a 22kW or 24kW Generac air cooled unit handles the load. The big consumer is air conditioning, which on a Houston August afternoon is doing real work. Those sizes also handle the fridge, lights, well or pool pump, and a microwave starting at the same time. Past 4,000 square feet, multiple HVAC zones, an elevator, or a pool with electric heater, you’re looking at 26kW or larger. Cummins becomes a real option in that size class. A free estimate includes a proper load calculation so the unit fits your house, not someone else’s.