Domestic Water Heating

Comparing costs of water heaters

Sometimes residential size equipment is used in commercial settings: warehouses, industrial, multifamily complexes, and others.

When comparing equivalent residential equipment, natural gas heats water more quickly than electricity, resulting in significant savings, as indicated in the table below.

Multifamily Building Hot Water Savings by Converting from Electric to Gas

# of Units in Building Natural Gas Costs Electricity Costs Savings  25  $6,138  $13,488  $7,350  50 $12,276  $26,976 $14,700  75 $18,414  $40,464 $22,050 100 $24,552  $53,952 $29,400 125 $30,690  $67,440 $36,750 150 $36,828  $80,928 $44,100 175 $42,966  $94,416 $51,450 200 $49,104 $107,904 $58,800

Assumptions
Commercial buildings with an annual water heater consumption of 1000 m³ and multi-family building with a minimum of 4 units located in the Union Gas service area qualify for this limited time offer.

Based on: Water Heater efficiency of 65%.Typical family size of 3 per unit. Annual Hot Water use of 17,602 USG/year. Gas Price $0.3321 per m³. Electricity Price $0.0968 per kWh. Electric Demand Charges are not included.

Find manufacturer's information on storage water heaters.