Every Type of Block Heater, Compared
"Block heater" covers a family of engine pre-heaters, from the classic frost-plug element to magnetic stick-ons. They differ enormously in effectiveness, price, and install effort. Here's the whole family with honest verdicts.
| Type | Price | Wattage | Install | Best for |
|---|---|---|---|---|
| Frost Plug (Cartridge) Block Heater | $40–$120 CAD | 400–1,000 W | Shop recommended | The most effective permanent option for any vehicle driven through a real Canadian winter. |
| Inline Coolant Heater | $60–$180 CAD | 600–1,500 W | DIY-moderate | Vehicles where no frost-plug element exists, or diesels that want more heat than a single cartridge provides. |
| Oil Pan Heater | $30–$100 CAD | 150–500 W | DIY-easy | A second heat source, vehicles with inaccessible frost plugs, or equipment that lives outside. |
| Magnetic Block Heater | $40–$90 CAD | 200–800 W | DIY-easy | Renters, second vehicles, equipment, or anyone who can't (or won't) do a permanent install. |
| Battery Blanket & Battery Warmer | $30–$80 CAD | 60–150 W | DIY-easy | Every cold-climate vehicle — a cold battery is the #1 reason cars don't start at -30°C. |
| Dipstick Heater | $20–$50 CAD | 60–200 W | DIY-easy | Last-resort or emergency use where nothing else fits. |
| Circulating (Pump) Coolant Heater | $120–$400 CAD | 1,000–1,800 W | Shop recommended | Diesel pickups, fleet and heavy equipment, and anyone in the -40°C belt. |
| Transmission & Auxiliary Pan Heaters | $40–$120 CAD | 100–500 W | DIY-easy | Plow trucks, equipment, and vehicles that must work — not just start — immediately in deep cold. |
Frost Plug (Cartridge) Block Heater
$40–$120 CAD · 400–1,000 W · Shop recommended
The classic block heater. A heating element replaces one of the engine's frost plugs and warms the coolant directly inside the block — the gold standard for cold starts.
Inline Coolant Heater
$60–$180 CAD · 600–1,500 W · DIY-moderate
Installed in a coolant hose rather than the block itself. Thermosiphon and pump-style versions circulate warmed coolant through the whole engine.
Oil Pan Heater
$30–$100 CAD · 150–500 W · DIY-easy
A flat heating pad bonded to the bottom of the oil pan. It warms the oil itself — the thing that actually resists a cold crank.
Magnetic Block Heater
$40–$90 CAD · 200–800 W · DIY-easy
A portable heater that clamps to steel with a powerful magnet. Zero installation — but zero installation is also its weakness.
Battery Blanket & Battery Warmer
$30–$80 CAD · 60–150 W · DIY-easy
A heated wrap or pad that keeps your battery warm. A battery at -30°C loses over half its cranking power — this is the cheapest fix in winter driving.
Dipstick Heater
$20–$50 CAD · 60–200 W · DIY-easy
A heating element on a rod that replaces your oil dipstick. Famous, cheap, and honestly the weakest tool in the box.
Circulating (Pump) Coolant Heater
$120–$400 CAD · 1,000–1,800 W · Shop recommended
The heavy artillery: a tank heater with an electric pump that actively pushes hot coolant through the engine and heater core all night.
Transmission & Auxiliary Pan Heaters
$40–$120 CAD · 100–500 W · DIY-easy
The same silicone-pad technology as oil pan heaters, applied to transmissions, hydraulics, and differentials — for machines that have to do work the moment they start.