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Energy test guide · verified October 2, 2026
Your last twelve months of gas and hydro bills are a measurement instrument you already paid for. Split into baseload versus heating, normalized for weather, and benchmarked against similar homes, they tell you where the money actually goes — and they're the yardstick that later proves whether your upgrades delivered. Our planner does the rough cut in your browser; your advisor's model refines it.
Cost
Free — bring the bills
Splits
Baseload vs heating
Method
Weather-normalized
Role
The savings yardstick
Utility web portals export usage history in a click — kWh by month, m³ of gas by month. Twelve months minimum so both seasons are in the data; twenty-four is better because it averages a mild winter against a hard one.
July gas use is your water heater and stove — that's gas baseload. The overnight-summer floor on hourly hydro data (Ontario smart meters expose it in your utility portal) is your always-on electrical load: fridges, freezers, pumps, standby electronics.
Winter usage minus baseload is what you pay to fight the weather. For most older Ontario homes this is the dominant slice — which is why envelope and heating upgrades headline the plan.
Dividing heating energy by the winter's heating degree-days makes years comparable — so a mild February doesn't masquerade as savings, and a brutal one doesn't hide them. This is the step that separates analysis from anecdote.
Your per-degree-day, per-square-metre numbers land somewhere against similar homes — the planner's rough benchmark or your advisor's database. Whatever you upgrade next, this baseline is how you'll know it worked: same math, next winter.
Do the rough version yourself in the planner (it seeds typical figures for your home's size and era, and your real bills sharpen it). Then bring the actual bills to your EnerGuide assessment — the advisor's model ties them to the blower door number and envelope data, which is where projections stop being brochure numbers.
The analysis points at one of two problems, each with its own moves:
Often $100s/yr found
The 25-year-old basement beer fridge, the chest freezer serving six items, a dehumidifier running 24/7, pool and well pumps, electric water heating on the wrong schedule. A $30 plug meter convicts suspects one at a time.
The planner's job
Air sealing, insulation, then right-sized equipment — the whole retrofit path this site maps, with the rebates that currently apply. The bill analysis is what proves the sequence worked, winter over winter.
Free to try
Ontario's time-of-use and ultra-low-overnight plans reward shiftable loads — EV charging, water heating, laundry. The right plan depends on your pattern, which the hourly data reveals.
At replacement
If summer gas or a big electric baseload traces to hot water, a heat-pump water heater or a better schedule is a real line item — sized and sequenced at your next replacement, not as a panic purchase.
One discipline: change one thing at a time where you can, and re-read the normalized numbers after. The houses that actually get cheaper to run are the ones where somebody kept score.
Maybe — or they're two people to your five, keep it at 19°C, cook less, and sit on a different rate plan. Occupancy and behaviour swamp house differences until you normalize; that's why the analysis compares per-degree-day intensity against similar homes rather than raw bills over the fence.
Deliberately rough: it seeds typical figures for your era and size, and your real bills tighten it into a fair estimate of your split and likely savings ranges. The advisor's model — fed by your blower door number and envelope data — is the version to make purchase decisions on.
Mostly, yes: Ontario utility portals expose hourly smart-meter data — look at 2–5 a.m. on a mild summer night and you're staring at your always-on load. If that floor is high, the hunt (old fridge, pumps, dehumidifier) almost always finds the culprit within an afternoon.
Run the planner with your bills, then let us match you with an advisor whose model turns them into a plan with numbers you can hold it to.
Email us what you’re planning, your postal code and the type of building (a house, a duplex or triplex, or a larger multi-unit building) — we’ll reply with registered service organizations for your area and which rebates apply.
Email dave@clickshift.ca