How to reduce water heater energy use
Water heating is typically one of the largest energy uses in a home, so trimming it pays off month after month. The good news is that many of the most effective steps are low-cost or free, and several you can do yourself.
For Metro Vancouver and Fraser Valley homeowners, a mix of simple adjustments and smart maintenance can meaningfully lower hot-water costs without sacrificing comfort. Below are the highest-impact changes, from quick wins to bigger upgrades. HeatLand, licensed and serving the Lower Mainland since 1999, offers efficiency-focused tune-ups and can advise whether an upgrade makes sense for your household.
Quick, low-cost wins
Start with the settings and habits that cost little or nothing. Set the tank to 120 F (49 C) – a common factory setting is higher, and each degree lower reduces standby heat loss. Fix dripping hot taps promptly, since a steady drip of hot water wastes both water and the energy used to heat it. Install low-flow showerheads and faucet aerators to cut hot-water volume without a noticeable difference in a shower.
Small behaviour changes help too: run dishwashers and laundry with full loads, wash clothes in cold or warm rather than hot where suitable, and take slightly shorter showers. If your heater has a vacation or lower setting, use it when you’re away for several days. None of these require special equipment, and together they can noticeably reduce the energy your water heater uses over a year.
Insulation and sediment maintenance
Two maintenance steps deliver real efficiency gains. First, insulate exposed hot-water pipes with foam sleeves so heat isn’t lost as water travels to your taps – this also means hot water arrives faster. On older tanks that feel warm to the touch, an approved insulating blanket can reduce standby losses; on gas units, keep the top, burner area, and vents clear and follow the manufacturer’s guidance, as improper wrapping can be unsafe.
Second, flush the tank roughly once a year to remove sediment. Sediment settles at the bottom and forms an insulating layer between the burner or element and the water, forcing the heater to work harder and longer to heat the same water. Clearing it restores efficiency, reduces rumbling noise, and can extend tank life. If you’re not comfortable flushing the tank or the drain valve is stuck, a technician can do it as part of routine maintenance.
Bigger upgrades and when to call a pro
If your equipment is aging or your bills are high, consider the larger moves. A tankless water heater heats water on demand and eliminates standby losses from keeping a tank hot, often improving efficiency for the right household. Heat-pump (hybrid) water heaters are dramatically more efficient than standard electric tanks by moving heat rather than generating it. Both are bigger investments, and rebates may be available – though exact program details and amounts should be confirmed through current official sources rather than assumed.
Some steps involve gas or electrical work – adjusting gas controls, wiring, or installing new equipment – which should be handled by a licensed professional. If you smell gas, see scorching, or find water pooling around the unit, stop and call for service. HeatLand’s TSBC-certified team can flush your tank, verify settings, identify efficiency losses, and help you compare an efficiency tune-up against an upgrade, with financing available.
Quick Checklist
- Set the tank to 120 F (49 C)
- Fix dripping hot taps right away
- Install low-flow showerheads and aerators
- Insulate exposed hot-water pipes
- Flush the tank yearly to clear sediment
- Run full dishwasher/laundry loads and wash cold when possible
| Action | Effort | Impact |
|---|---|---|
| Lower temp to 120 F | Low | Moderate |
| Insulate pipes | Low | Small-moderate |
| Flush sediment yearly | Medium | Moderate |
| Low-flow fixtures | Low | Moderate |
| Upgrade to tankless/heat pump | High | Large |
Frequently Asked Questions
What’s the single best way to cut water heating costs?
There’s no one magic step, but lowering the temperature to 120 F and reducing hot-water demand with low-flow fixtures give the biggest low-cost gains. For larger savings, upgrading an old tank to a heat-pump or tankless unit can significantly reduce energy use, especially if your current heater is inefficient or aging.
Does insulating my water heater really help?
Yes, especially on older tanks that feel warm to the touch and on exposed hot-water pipes. Insulation reduces standby heat loss, so the heater cycles less. On gas units, follow manufacturer guidance and keep the burner area, top, and vents clear, since improper wrapping can be unsafe.
How often should I flush my water heater?
About once a year for most homes. Sediment builds up at the bottom of the tank and acts as an insulating layer, forcing the heater to work harder and use more energy. Annual flushing restores efficiency, reduces noise, and can extend tank life. A technician can do it during maintenance.
Is a tankless water heater more energy efficient?
Often yes, because it heats water on demand and avoids the standby losses of keeping a full tank hot around the clock. The benefit depends on your usage patterns and setup. A HeatLand technician can assess whether a tankless or heat-pump upgrade would pay off for your household.
Reviewed by the HeatLand Heating & Cooling team — licensed HVAC contractor serving Metro Vancouver & the Fraser Valley since 1999. This article is for general guidance only. If you smell gas, suspect a carbon monoxide leak, or are unsure about any electrical or gas component, stop troubleshooting immediately and call a licensed technician or 911.