The Lights Go Out and the Furnace Goes With Them
Every winter, Pacific windstorms and arctic outflow events knock out power to hundreds of thousands of BC Hydro customers at once, and every time it happens, phones across Metro Vancouver start ringing with the same surprised question: the power is out and my furnace is not working, is it broken? It almost never is. A modern gas furnace needs electricity for the blower that moves air, the draft inducer that vents combustion gases, the igniter that lights the flame, and the thermostat that orchestrates all of it. Cut the 120 volts and the whole chain stops, no matter how much gas is in the line.
What separates a stressful night from a costly disaster is preparation, and the window to prepare is right now, in November, before the first big outage of the season. This guide covers what actually keeps producing heat when the grid is down in BC, what each backup option costs in 2026, the mistakes that send people to hospital with carbon monoxide poisoning every storm season, and the pipe-freezing math that decides how fast an unheated house in Vancouver, North Vancouver, Surrey, Langley or Abbotsford becomes an insurance claim.
A few numbers frame the stakes. A typical Metro Vancouver house with decent insulation cools by roughly one to two degrees per hour in an outflow wind, from 21 down toward outdoor temperatures over a day. Plumbing risk climbs once indoor temperatures approach freezing, usually eight to twelve hours into a cold-weather outage. And the cheapest meaningful preparation, a working carbon monoxide alarm and a flashlight plan, costs under $100. The expensive options, standby generators and battery walls, start in the thousands. Everything in between is covered below with real prices.
Why Your Gas Furnace Needs Electricity to Run at All
Homeowners often assume a gas appliance should run on gas, and for old standing-pilot equipment that was nearly true. A 1970s furnace with a millivolt thermostat and a gravity chimney could limp through an outage. Everything installed in the last thirty years cannot, and for good safety reasons. The draft inducer pre-clears the heat exchanger before the gas valve opens, so combustion gases cannot spill into the house. The hot-surface igniter glows like a lightbulb filament to light the burners, replacing a standing pilot that wasted gas year-round. The blower motor moves heated air through the ducts, and the 24-volt transformer that runs the control logic needs line voltage. Kill the power and the furnace fails safe, which is exactly what you want it to do.
The same logic applies to nearly everything else that heats BC homes. Boilers stop because the circulator pumps and aquastat controls need power, even though the burner itself is gas. Modern direct-vent gas fireplaces with blowers and electronic ignition stop too, though most will still produce some radiant heat on battery backup or manual mode at reduced output; check your manual, because a handful of millivolt models with standing pilots genuinely do keep working. Electric baseboards, electric furnaces and heat pumps obviously stop dead, and a heat pump outdoor unit should have its breaker turned off during an outage anyway, because the moment power returns mid-cycle is hard on the compressor.
One more Metro Vancouver wrinkle: if your home is on a well, the pump needs electricity too, so acreage properties in Langley and across the Fraser Valley lose water along with heat, which matters when the standard frozen-pipe advice is to run a trickle of water. If you are on a well, keep several jugs of drinking water on hand and know where your pressure tank shutoff is. Our furnace not working troubleshooting guide covers the full diagnostic path for when the power is back and the furnace still will not start.
The most common storm call we answer is not a broken furnace. It is a furnace that did exactly what it was designed to do during an outage, waiting patiently for power to come back. The second most common is a furnace that locked out when power flickered back on, which a breaker reset or power cycle usually clears.
Your First Hour: A Safe Response Checklist
Before you think about backup heat, spend fifteen minutes on the sequence that matters. Every step below is free, and the order is deliberate: confirm the outage, protect the house, then decide whether you are staying warm in place or relocating for the night.
Report and confirm the outage
Report to BC Hydro at 1-800-224-9376, online or through their app to see the outage map and estimated restoration. If only your house is dark, check the main breaker before assuming the grid is fine.
Protect the furnace and heat pump
Leave the furnace breaker on but switch the thermostat to off or the system to off so equipment does not slam on mid-flicker. Turn the heat pump outdoor unit off at its disconnect until power is stable.
Start the pipe protection clock
Once the house is cooling, open cabinet doors under sinks on exterior walls, let vulnerable taps drip if you still have water pressure, and know where the main shutoff is before you need it in a hurry.
Pick a warm room and defend it
Choose one room, ideally small, interior and south-facing, close its door, hang blankets over windows and settle in with layers. One defended room stays surprisingly livable overnight.
If heat loss is urgent, infants or elderly family members are in the house, or outdoor temperatures are well below freezing, do not tough it out: book a hotel or stay with family, and run the taps before you leave. Our emergency line at 604-615-2212 runs 24 hours for genuine no-heat emergencies, with a flat $150 after-hours premium disclosed before we roll, and our emergency services page explains what qualifies and how fast we respond across the region.
Wood Fireplaces and Stoves: BC's Most Reliable Backup Heat
Nothing in a power outage beats dry firewood. A wood insert or freestanding stove produces five to ten kilowatts of heat with zero dependence on the grid, heats a main floor comfortably even in an outflow wind, and keeps working for days. Metro Vancouver is full of them: heritage homes in Vancouver and North Vancouver often retain original masonry fireplaces, and decades of renos have added them across the region. The honest qualification is that an open masonry fireplace is a poor heater, netting almost nothing once you account for the warm house air it pulls up the chimney, while a modern EPA-certified insert or stove converts seventy percent of the fuel's energy into room heat.
Costs in 2026: seasoned and split firewood runs roughly $350 to $550 per cord delivered in Metro Vancouver, and a well-used insert through a cold winter burns two to three cords. An EPA steel insert installed with a proper stainless liner runs $3,500 to $6,000 including chimney work, which is the number to weigh against a generator. Before you rely on any wood appliance, the chimney needs to be clean and sound, and a working carbon monoxide alarm with a battery backup is non-negotiable, because outage nights are when BC families close every window and run untested equipment all night.
Know the burn-ban rules. Metro Vancouver and the Fraser Valley Regional District issue seasonal open-burning bans and, occasionally, fireplace advisories during air-quality episodes; certified wood stoves are generally exempt from residential restrictions, but check current advisories during poor-air events, which sometimes coincide with the stagnant, cold, windless weather that also stresses the grid. Store a storm supply of wood somewhere covered, keep kindling dry, and keep matches where the kids cannot reach them and you actually can.
Portable and Standby Generators: What They Can Really Run
A generator can absolutely run your furnace through an outage, and for many BC families a mid-size portable inverter unit is the single best storm purchase. The trick is sizing honestly and connecting safely. The table below shows what a typical Metro Vancouver home's essentials actually draw, from the spec sheets we work from.
| Load | Running watts | Startup surge | Notes |
|---|---|---|---|
| Gas furnace blower, 1/2 HP | 600 - 800 | 1,200 - 2,400 | The surge is what kills undersized generators |
| Refrigerator | 150 - 250 | 800 - 1,200 | Cycles on and off; a fridge rides out most outages closed anyway |
| Internet router and phones | 30 - 60 | negligible | Keeping connectivity is worth it during storms |
| LED lights, one circuit | 60 - 120 | negligible | Run an extension through a window, not through walls |
| Gas fireplace insert blower | 80 - 150 | 200 | Small load, big comfort payoff |
| Sum of essentials | ~1,000 - 1,400 | peaks ~3,500 | A 3,500W inverter generator covers a family's real needs |
In practice, a 2,000 to 3,500 watt portable inverter generator, $700 to $2,500 in 2026, runs the furnace, the fridge and the router through a long outage. Connection is the part people get wrong. Never backfeed a dryer outlet, which energizes the street line and endangers utility crews, and never run any generator indoors, in a garage or under a soffit: carbon monoxide kills BC residents this way every storm season. The right setup is a transfer switch or a breaker interlock installed by a licensed electrician under a Technical Safety BC permit, $600 to $1,500 installed, which lets you safely select furnace and fridge circuits. Whole-house standby generators on natural gas with automatic transfer run $8,000 to $15,000 installed and start themselves whether you are home or not, which matters for vacation properties and for people who travel.
Generator safety in one sentence: outdoors only, at least five metres from any door or window, with a carbon monoxide alarm inside the house, connected through a proper transfer switch, never a dryer cord.
Battery Backup: Can It Really Run a Heat Pump?
Home batteries like the Tesla Powerwall and its competitors are becoming the quiet storm upgrade of choice in Vancouver and North Vancouver, where natural gas is being phased out of new construction and heat pumps are taking over. The honest capacity math: a common battery stores 13.5 kilowatt-hours, a cold-climate heat pump draws two to five kilowatts while heating, and an outage evening of heat, fridge, internet and lights uses six to ten kilowatt-hours. That means a single battery comfortably carries a home through most of Metro Vancouver's outages, which average under a day, and pairs beautifully with a soft-start kit on the compressor to smooth the startup surge. Where it falls short is multi-day events in freezing weather, which is why battery-plus-generator or battery-plus-wood setups are the belt-and-suspenders standard.
Cost in 2026 runs $12,000 to $20,000 installed for a whole-home battery before any incentives, with BC Hydro and federal programs periodically offsetting a slice for eligible configurations, particularly when installed alongside solar. If that number is beyond the storm budget, a far cheaper partial answer is a battery power station, the suitcase-sized units from $500 to $2,000, which run internet, phones, LED lights and a CPAP machine all night and recharge from a running vehicle or a small generator. They will not run a furnace, but they keep the parts of an outage that actually frighten people, the darkness and the silence, manageable.
If you are planning a heat pump or already have one, our heat pump services page covers the equipment side, and our heat pump defrost and ice guide explains the other thing owners watch anxiously through cold snaps: the outdoor unit frosting up and hissing through defrost cycles. None of it works in an outage, but a homeowner who understands defrost understands restart behaviour too.
Keeping Pipes From Freezing While the Power Is Out
Losing heat is uncomfortable; losing plumbing is expensive. A burst supply line inside a wall releases hundreds of litres per hour, and by the time anyone notices, ceilings are down and flooring is ruined. The risk clock starts when indoor temperatures drop below about 4 degrees and gets serious toward zero, which in a poorly insulated home during an outflow event means the danger zone arrives overnight, exactly when nobody is watching. Attic and crawlspace pipes fail first, then runs along exterior walls, then the hose bib someone forgot to drain in October.
The playbook, in order: keep taps on exterior walls dripping both hot and cold if you have municipal water pressure; open every cabinet door that hides plumbing; stuff towels along the sill of the collected-family-room door and let one warm body per pet share the space; if temperatures in the house are heading below 5 degrees overnight and power is not coming back, shut the main valve and drain what you can, opening the lowest tap in the house. Well owners should shut the power to the pump and drain the pressure tank. If you leave, do not heat with anything unattended, and never with anything meant for outdoors.
For homes that have been through it before, our burst pipe guide: the first sixty minutes is the shutoff-and-mitigate sequence worth bookmarking, and homes with sump pits should remember that a dead sump pump during a winter storm that turns to rain is its own flood risk; a battery backup for the pump, $350 to $700 installed, is covered in detail in our sump pump installation cost guide. Both upgrades are dramatically cheaper after a week of dry weather than during the first night of a storm.
The Outage-Ready Budget: What Preparation Costs in BC (2026)
Storm preparation is not all-or-nothing. The table below is the ladder we walk customers up, from the hundred-dollar basics every home should already have to the whole-house systems that make outages boring. Pick the tier that matches your household's risk: a young couple in a new concrete condo needs almost none of this, while a family in a 1950s wood-frame house in North Vancouver with a heat pump and big trees overhead has a strong argument for the top rungs.
| Upgrade | Cost (2026) | What it buys you |
|---|---|---|
| LED lanterns, headlamps, batteries | $40 - $80 | Light without candles; safer around kids and pets |
| Battery CO and smoke alarms | $30 - $60 | The single most important line item on this table |
| Seasoned firewood, half cord | $200 - $300 | Two or three storm nights of real heat for wood-burning homes |
| Battery power station | $500 - $2,000 | Internet, phones, lights and medical devices overnight |
| Portable inverter generator, 2,000-3,500W | $700 - $2,500 | Furnace, fridge and essentials through multi-day outages |
| Transfer switch or interlock, installed | $600 - $1,500 | Safe, code-compliant connection; permit through Technical Safety BC |
| Sump pump battery backup | $350 - $700 | Flood protection when the pit fills with no power |
| EPA wood insert with liner | $3,500 - $6,000 | Grid-independent heat that also cuts winter heating bills |
| Whole-home battery | $12,000 - $20,000 | Silent overnight coverage for heat pump homes; pairs with solar |
| Standby generator with ATS | $8,000 - $15,000 | Automatic whole-house power whether you are home or not |
Whatever tier you choose, test it before storm season, not during: run the generator for twenty minutes in October, change alarm batteries when the clocks change, and burn one full fire in November so you know the chimney draws. If the furnace misbehaves after an outage, whether it is a lockout that will not clear or something the power flicker damaged, the $89 diagnostic finds it and credits toward the repair, and our heating team covers all of Metro Vancouver with 30 to 45 minute response.
FAQ
Heating During a Power Outage in BC: FAQ
No. Modern gas furnaces need 120 volts for the blower, draft inducer, igniter and thermostat controls, so they shut down when the power does. Only millivolt gas fireplaces with standing pilots keep producing heat. Once power returns, a furnace that will not restart has usually locked out; try the breaker and a power cycle, and if it stays dead our $89 diagnostic, credited toward repair, finds the cause.
Gather everyone in one small interior room and defend it with closed doors and blankets over windows, run a wood fireplace or stove if you have one, use sleeping bags and layers, and run the furnace off a portable generator through a transfer switch if you own one. Barbecues, camp stoves and propane heaters are outdoors only. If the house cannot stay above about 10 degrees overnight, spend the night elsewhere.
Yes, with the right setup: a 2,000 to 3,500 watt inverter generator, a transfer switch or interlock installed by a licensed electrician, and a carbon monoxide alarm in the house. The furnace blower draws 600 to 800 running watts with a startup surge of 2,400 or more. Never backfeed a dryer outlet and never run the generator indoors or in a garage.
A typical Metro Vancouver house cools one to two degrees per hour in an outflow wind, and plumbing risk climbs once indoor temperatures approach 4 degrees, usually eight to twelve hours into a cold-weather outage. Drip taps on exterior walls, open sink cabinets, and if temperatures are heading below 5 degrees overnight with no restoration coming, shut the main and drain the system.
No. Charcoal barbecues, propane camp stoves and patio heaters produce carbon monoxide, and using them indoors or in a garage during storms is how BC residents end up in hospital every winter. Use them outside, at least a few metres from doors and windows, for cooking only. Heat with clothing, blankets, a wood appliance or a properly connected generator instead.
No, heat pumps need electricity for the compressor, fans and controls. During an outage, switch the outdoor unit off at its disconnect so it does not restart mid-surge when power returns. Whole-home batteries, $12,000 to $20,000 installed before incentives, can carry a heat pump through most of Metro Vancouver's outages, which average under a day. Pairing a battery with a wood appliance covers the rare multi-day events.
A whole-house standby generator on natural gas with an automatic transfer switch runs $8,000 to $15,000 installed, including the electrical work permitted through Technical Safety BC. The budget alternative is a 2,000 to 3,500 watt portable inverter generator at $700 to $2,500 plus a $600 to $1,500 transfer switch installation, which is enough to run a furnace, fridge and essentials safely.
Confirm the breaker and the furnace switch are on, set the thermostat to heat and listen for the normal start sequence. Many furnaces lock out after a power flicker and reset themselves after power is cycled at the switch. If it will not start after that, check the 3-amp fuse on the control board if you are comfortable, or call us: the $89 diagnostic is credited toward any repair, and after-hours calls add one flat $150, disclosed upfront.
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BC HOME SERVICE
Power Is Back but the Heat Is Not? We Answer 24/7
Post-outage lockouts, blown board fuses and storm-damaged controls are standard winter work for our vans across Metro Vancouver. The $89 diagnostic is credited toward any repair, after-hours is one flat $150 disclosed before we roll, and response runs 30 to 45 minutes. Call 604-615-2212 any hour.
Call 604-615-2212