BeeWarm system guide · Lower Mainland
Electric hot water tanks
Understand electric resistance tanks, capacity, recovery and the electrical questions to ask before replacement.
2 min read · Heating & Hot Water editorial team · Updated October 4, 2026
In this guide
A straightforward category, with important differences
An electric storage tank uses resistance elements to heat stored water. It does not use a combustion vent, but it still needs suitable electrical capacity, plumbing, drainage and service access. It is different from a heat-pump water heater, even though both use electricity.
Before asking for a like-for-like replacement, write down what works and what does not: how many consecutive showers the current tank supports, when hot water runs short, and whether the household has changed since it was installed.
Compare capacity and recovery together
Tank volume describes stored water; recovery describes how quickly the equipment replaces heat after use. Ask for a recommendation based on your busiest period rather than just the number of bedrooms. Confirm the units on the specification sheet—litres and gallons should not be compared as if they were the same.
The proposed model’s voltage and input must be checked against the available circuit. Have an electrician or appropriately qualified installer identify any necessary work. An existing connection is not proof that a different model is suitable.
Compare standard electric with heat pump
If you are replacing an electric tank, ask for a separate assessment of a heat-pump option. Consider installation space, noise, condensate drainage and household usage as well as efficiency. A low purchase price and a low lifetime cost are different questions.
For a standard electric tank, NRCan’s EnerGuide information uses standby loss to help compare similar products. Ask for equipment, installation and maintenance costs to be shown separately, using current local electricity rates rather than a generic savings promise.
Common questions
Is an electric tank the same as a heat-pump tank?
No. A conventional electric tank uses resistance heat. A heat-pump tank moves heat from its surroundings and may also use backup elements.
Can I increase the element size to get more hot water?
Do not alter the equipment. Ask a qualified professional to assess demand, the appliance and the circuit.
Sources & further reading
Check the selected manufacturer’s current instructions. Program eligibility and installation requirements can change.
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