Estimated Standby Generator Capacity

Approximate number of major household systems and appliances that can be powered simultaneously by common residential generator sizes. for kW14 kW18 kW22 kW24 kW26 kW28 kW

Estimated Generator Sizing Guide

Generator Size	Typical HVAC Capacity	Estimated Appliances & Circuits Supported
10 kW	2-3 ton A/C or heat pump	Refrigerator, freezer, lights, TV, internet, microwave, garage door, well pump, small HVAC system
14 kW	3-4 ton A/C or heat pump	Everything in 10 kW plus dishwasher, disposal, additional lighting circuits, multiple TVs and electronics
18 kW	4-5 ton A/C or heat pump	Most average homes including refrigerator, freezer, HVAC, water heater (gas), kitchen circuits, laundry, lighting, internet, security systems
22 kW	5 ton A/C plus additional loads	Common whole house generator size capable of supporting most homes up to 3,500 sq ft with managed loads
24 kW	5 ton A/C plus electric appliances	Most household circuits, multiple refrigerators, larger homes, pool equipment, workshop circuits
26 kW	Large 5 ton system or dual HVAC zones	Nearly entire home operation including larger electrical demands and multiple comfort systems
28 kW	Dual HVAC systems or large custom home	Whole home coverage for many larger residences, including pools, electric water heaters, home offices, and extensive appliance usage

Common Appliance Wattage Estimates

Appliance	Running Watts
Refrigerator	600-800 W
Freezer	500-700 W
Microwave	1,000-1,500 W
Dishwasher	1,200-1,800 W
Electric Water Heater	4,000-5,500 W
Electric Range	8,000-12,000 W
Clothes Dryer	4,000-6,000 W
Well Pump	1,000-2,000 W
2 Ton HVAC	2,500-3,500 W
3 Ton HVAC	3,500-5,000 W
4 Ton HVAC	4,500-6,000 W
5 Ton HVAC	5,500-8,000 W

Typical Home Recommendations

10-14 kW

• Small homes (1,200-2,000 sq ft)
• Essential circuits coverage
• Single HVAC system
• Budget-conscious backup power

18-22 kW

• Medium homes (2,000-3,500 sq ft)
• Most popular whole home generator sizes
• Single larger HVAC system
• Near whole-home coverage

24-28 kW

• Large homes (3,500+ sq ft)
• Multiple HVAC zones
• Pools, workshops, and high electrical demand
• True whole-home backup capability

For a GenWorkX website, a good conversion-focused message would be that generator size should always be determined by a professional load calculation, since square footage alone is not an accurate sizing method. This helps establish expertise while encouraging consultation requests.