Heating Smartly
- Household hot water use is primarily for heating, accounting for about 90% of consumption. To use it wisely, it’s crucial that the heating system is in good condition and properly adjusted.
Radiators with thermostatic valves are ideal. These have a small sensor (often hidden) that measures room temperature and adjusts the radiator accordingly. In cold weather, such radiators should automatically regulate the heat without needing manual adjustments. Typically, setting radiators to the middle setting (2-3 on most dials) is sufficient. If they fail to respond to temperature changes, it might be time to call a plumber.
The higher the radiator setting, the more water flows through it. As a rule of thumb, if the bottom of a radiator is hotter than your body temperature, it’s either set too high or undersized for the room.
In very cold weather, water in the system is hotter, and radiators set at maximum can become dangerously hot.
Special radiator controls (backflow-controlled radiators) are sometimes used in spaces with frequent drafts, like entryways or near balcony doors. These regulate based on water temperature rather than air temperature, ensuring efficient heating even when doors are opened. Such radiators should typically be set no higher than 2.
Simple Home Adjustments
Keep radiators clear: Furniture or curtains placed directly in front of radiators trap heat, causing thermostats to measure the wrong temperature. Move obstructions to allow heat to flow freely.
Close windows above radiators: Heat rises, so an open window above a radiator lets the warmth escape. Ventilate briefly but avoid leaving windows open for long periods.
Fix non-responsive radiators: If a radiator doesn’t heat up when adjusted, its thermostat pin may be stuck. Removing the thermostat head and gently loosening the pin can often solve the issue. If not, contact a plumber.
Check Your Radiators
- Noisy radiators: If radiators hum or whistle, they may need professional adjustment as they are wasting water.
- Hand towel warmers: While convenient, they can overheat and waste water, unnecessarily increasing your bill.
Air in radiators: Knocking sounds often indicate trapped air. Use a radiator key to bleed the air out, placing a container under the valve to catch any drips.
Comfort and Efficiency
Hot tubs: While enjoyable, they lose heat rapidly in cold weather. During peak cold periods, it’s better to skip using them to conserve resources. If you do use one, ensure it’s well-insulated with a tight lid. Minimize constant water flow to reduce waste.
Snow melting systems: These systems consume significant hot water. Regularly monitor them to avoid excessive use, which can drive up costs unnoticed until the bill arrives.
Bath or shower?
Filling a bathtub uses about 30 liters more hot water than a shower. However, the overall impact on household consumption is small, so the choice is yours.
For more detailed guidance on household hot water usage, you can find additional information and benchmarks here.
