Top entry residential electric water heaters. Capacity of 40.5 imperial gallons (184 litres), insulated with 2 in eco-friendly. Input 3 000W, 240V. Dimensions: 22 in diameter x 48 1/8 in height. Plumbing connections of 3/4po NPT. All models meet or exceed RNCan energy efficiency requirements. Giant residential water heaters have a six (6) years limited warranty against inner tank leakage and a one (1) year limited on parts.