Build a fairer before-and-after heat pump energy record using billing days, consumption, weather and changes in household use.
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Updated 2026-09-18 · CANRO Heating & Cooling
To compare energy use before and after a heat pump installation, keep consumption records as well as bill totals. A price increase, a longer billing period or colder weather can change the bill without showing that the equipment is performing worse.
The purpose of a household baseline is to identify patterns and useful questions. It is not a laboratory efficiency test or a guarantee of savings attributable to one appliance.
If the heat pump replaces gas or another fuel, retain those records alongside electricity use. An increase in electricity can accompany a reduction in another heating fuel. Looking at only one account can miss that change.
Record whether other appliances still use the old fuel. A remaining gas bill may include water heating or cooking, so it should not automatically be assigned entirely to space heating.
BC Hydro's MyHydro tools support reviewing and comparing electricity use. Use the information available for your account rather than estimating consumption from the amount of an equal-payment withdrawal.
For electricity, divide the period's kWh by its number of days to obtain an average daily figure. As an illustrative arithmetic example, 900 kWh over 30 days is 30 kWh per day; 960 kWh over 32 days is also 30 kWh per day.
That adjustment handles billing length only. It does not correct for weather, occupancy, hot-water use or changes in the home's comfort level. Do not treat equal daily consumption as proof of equal heating efficiency.
Note if you began cooling rooms that previously had no air conditioning, heated more of the home or maintained a different temperature. Those are changes in service as well as energy use. Compare similar seasons and discuss weather differences when interpreting a result.
If backup heat or control behaviour is a concern, provide the record to the installer and ask what operational assessment would help. Do not disable backup heat or change technical settings just to lower a graph.
Instead of “the bill is too high,” ask: “Daily electricity use increased during this period, with these settings and no known occupancy change; can you check the intended control operation?” Attach relevant dates and the equipment details.
Keep personal account access private. Share the necessary consumption figures or redacted records rather than your utility password. Continue using the baseline as a household planning record, with conclusions limited to what the data actually supports.
Technical references checked 2026-09-18. The planning examples are illustrative; equipment instructions and project requirements must be checked for your home.
For help with a residential HVAC project in Greater Vancouver, contact CANRO with your equipment details and the question you need answered.
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