Electric machines are quiet and easy but limited. Gas machines are strong and fast but loud, and they come with fuel, fumes and upkeep. This guide compares them on power, safety, storage and Ontario winters, then gives clear choose-if rules.
In This Article
The two machines side by side
| Factor | Electric | Gas |
|---|---|---|
| Power and flow | Generally lower, so large areas take longer | Generally higher, so rinsing and big surfaces go faster |
| Noise | Moderate hum | Loud enough that hearing protection makes sense |
| Fumes | None at the machine | Exhaust, including carbon monoxide |
| Setup | An outdoor outlet and a suitable cord | Fuel, oil and a pull-start engine |
| Weight and storage | Lighter and compact | Heavier, with fuel to store safely |
| Upkeep | Little beyond hoses, filters and tips | Engine care: oil, spark plug, fuel treatment |
| Best suited to | Patio furniture, bikes, small patios, light decks | Large driveways, big decks, long fences |
Pressure numbers vary a great deal between models, so read the PSI and GPM on the label rather than assuming from the power source.
Electric: the safety details people miss
Water and electricity share a driveway, so the setup matters. The Electrical Safety Authority says outdoor outlets should have ground fault protection (GFCI), and that cords used outdoors should be rated for outdoor use and never strung together in a chain. If your outlet lacks a GFCI, use a portable adapter.
- Keep plug connections off wet ground.
- Check the manual for the cord length and thickness the machine is designed for. An undersized cord can starve the motor.
- Never spray toward outlets, meters, light fixtures or overhead lines.
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Gas: what to know before you pull the cord
Carbon monoxide. Never run a gas engine in a garage, shed or any enclosed space, even with the door open, and keep it well away from open windows and doors. The gas is odourless and dangerous.
Fuel. Refuel only when the engine is off and cool, store fuel in an approved container away from the house, and treat leftover fuel before winter as the manual says.
Noise and neighbours. Gas engines are loud. Check your municipality's current noise rules and choose your hours with care.
Force. A stronger machine gouges wood and etches concrete faster, so tip choice and distance matter even more.
Surviving an Ontario winter in storage
The pump is the expensive part of any pressure washer, and Southern Ontario winters attack it. Water left inside can freeze and crack the pump or its fittings. Before the first hard freeze, disconnect the hoses, squeeze the trigger to release pressure and drain the water, and follow the manual on pump-protecting antifreeze. Store the machine indoors where it stays above freezing.
Gas engines need one more step: treat the fuel with a stabilizer or run the tank dry, whichever the manual specifies. In spring, check hoses, O-rings and the spark plug before the first job. For electric units, coil the cord loosely and keep it dry so the insulation lasts.
Choose electric, choose gas or choose neither
Choose electric if your jobs are small, such as a patio, steps, furniture and the car, you have a proper outdoor outlet, and you want low noise and low upkeep.
Choose gas if you regularly wash a big driveway, a large deck or long fences, you have somewhere safe to store fuel and the machine, and you accept the noise and maintenance.
Choose neither if the job is a one-time clean, involves siding or a ladder, or you doubt you will use the machine again. Renting vs buying a pressure washer sets out the sums.
What both machines share
Neither engine type makes you safer or gentler by itself. Both need a tap that can supply the flow the machine asks for, since a starved pump can be damaged. Both need drain-down and dry storage before the first freeze. Both can cause injury at close range, which is why DIY pressure washing safety is worth a read before the first spray.
Water quality plays a part too. Hard water in Waterloo Region and Guelph leaves scale in small orifices, so check the tip and the inlet filter after use, and clear them if the spray turns lopsided or the pressure surges.
If you would rather hand the job over, D&D Home Services lists pressure washing from $350 for typical Kitchener-Waterloo homes, and quotes are free and in writing.
Key Takeaways
- Electric machines are quieter, lighter and lower-maintenance but generally slower on big areas; gas machines are stronger but loud, with fuel and fumes.
- Use GFCI-protected outlets and outdoor-rated cords with electric machines, and never chain cords together.
- Run a gas engine only outdoors and well away from windows, doors and garages because of carbon monoxide.
- Match the machine to the jobs: small and occasional suits electric, large and frequent suits gas, and a one-time job may suit neither.
Sources & References
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