Turn the Printed Running Cost Into Dollars a Year

Pick one electricity rate and cite it, then multiply

A wattage is only half of a cost. The other half is a price per kWh, and Ontario's regulator publishes one: its table for prices set from November 1, 2025 lists Tiered electricity at 12.0 cents per kWh for the first 600 kWh a month in summer or 1,000 kWh in winter, then 14.2 cents. Time-of-Use runs from 9.8 cents off-peak to 20.3 on-peak, and the Ultra-Low Overnight plan from 3.9 to 39.1 depending on the hour. The table gives supply prices and no delivery charges, and the OEB resets it every November 1, so these figures are due to change. A reader with a bill in hand should swap in the rate printed there.

Running costs arrive from makers in a few shapes. A kWh-per-year figure is a finished equation waiting for a rate, and neither product here prints one. A wattage is an unfinished equation that needs hours of use the buyer has to supply. A subscription is the simplest, because the maker has done the annualizing. The microwave and the sleep clock fall in the second and third shapes, and the exercise is to notice which term is missing before calling the number small.

The microwave: a wattage needs your minutes, and the filter has no price

IKEA's page for the $199 LAGAN states 1000 W of microwave power; the manual gives the figure a bill needs, 1500 W of required AC input at 13.5 A. No yearly kWh figure is printed, so the calculation starts from an hour: 1.5 kW at 12.0 cents is 18 cents for every hour at full power. A household averaging ten minutes of full-power use a day logs about 91 kWh a year, or $10.95; at three minutes a day it is about $3.29. On Time-of-Use, the same ten minutes costs $8.94 at the off-peak price and $18.52 at the on-peak one. The minutes are the buyer's input, and the fan and light add a draw IKEA has not quantified.

The number of years to multiply by is a document question: the manual's guarantee page says two years for appliances named LAGAN, while the listing carries a six-year limited warranty line. Ten minutes a day costs $21.90 over two years and $65.70 over six, a small slice of $199 either way.

The second running cost is a consumable with an interval but no price. The manual says the charcoal filter used for recirculating installation should be changed every 6 to 12 months depending on use, and directs owners to order it under service part number 12270000008304 by phoning 1-866-866-4532. No cost is printed, so the filter line is one or two orders a year at a figure only that line can supply. A buyer venting the hood outdoors avoids the filter; one recirculating over a stove used daily should phone for the price before treating $199 as the whole cost.

The sleep clock: the plan is priced, the power draw is not

Best Buy Canada sells the Restore 3 at $229.99, and Hatch prints the plan terms: 30 days of Hatch+ included, then $5.99 a month or $59.99 a year, cancelable at any time. Hatch's page shows those amounts without a Canadian-dollar version, so they are written here in US dollars: US$71.88 a year on the monthly plan, US$59.99 on the annual one, nothing for a buyer who opts out. The FAQ says a subscription is not required to use the device. Three years on the annual plan come to US$179.97 and on the monthly plan US$215.64.

What neither Hatch nor Best Buy Canada prints is a wattage. The retailer lists a power adapter in the box and no figure, and Hatch's page offers none. For a device plugged in for eight hours every night, that is a real gap, and it stays open here instead of being filled with an estimate: the electricity line for the Restore 3 is unknown from the published material. The plan is the only running cost the maker has put a number on.

When the multiplication should stop the purchase

Skip the microwave's filter question only if the hood vents outdoors; a recirculating installation with an unpriced filter is a cost to phone for before it can be budgeted. Electricity itself is the minor term here: even ten minutes of full power every day is under $11 at the Tiered rate, and a time-of-use plan moves it by single dollars.

Drop the method for products whose running cost is dominated by a term the maker has not published. A sleep clock with no wattage and a microwave with no hours are both cases where the buyer supplies the missing number, and a supplied number is an assumption, not a finding. Write down which term you assumed, keep the printed terms separate from the assumed ones, and let the one priced line, the plan, carry the budget until the other has a source.