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Understand Your Heating Bill: How to Save

Learn how to read your heating bill and reduce household costs with practical steps.
By the Westfalia editorial team · Updated on 10.08.2026
Created and reviewed by the Westfalia editorial team.

In brief: Your heating bill is divided into fixed costs (30-50%) and consumption-based costs (50-70%). Check meter readings, heat cost allocators and the billing period. Save immediately by ventilating correctly, bleeding radiators and lowering the temperature at night. In the long term, insulation and modern thermostats can help.

Understand Your Heating Bill: How to Save

Your annual heating bill can raise a lot of questions. We explain how to read each line item, spot errors and reduce your costs over time, with practical tips for both quick savings and long-term improvements.

How do I read my heating bill?

Your bill has two main sections. The first shows the total costs for heating and hot water in the building. The second allocates those costs to individual apartments.

Check the allocation method. Heating costs include 30 to 50 percent fixed costs, allocated according to floor area. The remaining 50 to 70 percent are based on consumption.

Heat cost allocators on your radiators determine your consumption-based costs. Check that the device numbers on your bill match the numbers on your radiators.

“Consumption-based billing is required by law. It creates transparency and offers the greatest potential for saving. Everyone can see directly how their behavior affects costs.”

— German Energy Agency (dena)

Check these items

Compare your meter readings with the figures on your bill. Record the readings from your heat cost allocators yourself once a year.

Check the billing period. Do the start and end dates match the calendar year? Pay attention to the allocation methods for heating and hot water, which may differ.

Important note

You have twelve months to dispute your heating bill. This period begins when you receive the bill. If you spot obvious errors, contact your landlord or property management company in writing.

Why are my heating costs so high?

High costs often have several causes. An outdated boiler runs inefficiently. Uninsulated heating pipes in the basement lose heat. A lack of hydraulic balancing can cause uneven heat distribution throughout the building.

Your own habits also play a major role. Windows left tilted open in winter heat the outdoors. Furniture or long curtains covering radiators prevent heat from spreading properly.

The billing method can also affect your total. In buildings with many long-term tenants or little modernization, overall costs are often higher. Your consumption-based share may increase accordingly.

Identify hidden cost factors

Air in the heating system is a common cause of higher costs. If a radiator gurgles, the hot water is not circulating properly. The radiator may not warm up fully, even when the thermostat is turned all the way up.

Leaky windows and doors let heat escape. Drafts may force you to turn the thermostats up higher. Old, nonprogrammable thermostats cannot regulate the temperature precisely.

The heating system's nighttime setback may not be configured properly. If it runs at too high a flow temperature overnight, it uses unnecessary energy.

How can I save on heating costs right away?

Start by bleeding your radiators. You need a radiator bleed key and a container. Switch off the heating pump. Open the radiator valve until only water comes out.

Our

makes bleeding radiators quick and easy. You can save energy right away because your radiators can work at full capacity again.

Expert tip

Ventilate the right way. Turn radiator thermostats to the frost protection setting (star symbol) while airing out the room. Open the windows fully for five minutes. This replaces the stale air without letting the walls cool down.

Lower the room temperature. Every degree lower can save around six percent on heating costs. 20 to 21 degrees is enough for living rooms. 16 to 18 degrees is usually comfortable for bedrooms.

Use the nighttime setback. Modern thermostats can manage this automatically. Lower the temperature consistently at night and when you are away.

Practical steps for everyday life

Pull back long curtains. Keep large pieces of furniture away from radiators. Heat needs to circulate freely around the room.

Seal leaky window frames. Weatherstripping tape from a hardware store can help block drafts. Close shutters and curtains at night to add another layer of insulation.

Dust your radiators regularly. A thick layer of dust acts as insulation and reduces heat output. In the Garden + Outdoor section, you will find useful accessories for home maintenance.

“Up to 15 percent of heating energy is lost through uninsulated heating and hot-water pipes. Insulating pipes in the basement often pays for itself within one heating season.”

— Federation of German Consumer Organisations

Which long-term investments are worthwhile?

Programmable thermostats are a worthwhile investment. They control the temperature on a schedule and automatically turn the heat down while you sleep or are away from home.

Reflective foil behind radiators directs heat into the room and helps prevent it from escaping through exterior walls. Installation is simple, and you can notice the difference right away.

Hydraulic balancing by a heating professional optimizes the entire system. Each radiator gets exactly the amount of water it needs. This saves energy used by the pump and reduces temperature differences.

Additional advice

Suitable tubing and insulation materials are ideal for insulating pipes in basements or unheated rooms. Our

, a stainless steel braided hose, is suitable for drinking water and built for a wide range of applications.

Insulation and modern technology

Insulating the attic floor or basement ceiling is a major project, but it can be worthwhile. It significantly reduces heat loss. Government incentives may help cover the cost of improvements like these.

Modern condensing boilers capture heat from flue gases. They are significantly more efficient than older standard boilers. Replacing your boiler is one of the most effective ways to reduce heating costs.

For heating and garden projects, find accessories such as hoses and connectors in our Hoses category.

How do I protect my heating system outdoors?

Heating and water pipes in unheated garden sheds or garages must be protected from freezing. Insulation sleeves help prevent pipes from freezing. Drain unused pipes before winter.

Frost-protection heaters for utility rooms switch on automatically and keep the temperature just above freezing. This protects the system without using much energy.

Heavy-duty tarps are suitable for covering outdoor units or storage areas. Our transparent cover tarps

, and are tear-resistant, UV-resistant, and waterproof. They reliably protect equipment in the garden.

Get your heating system ready for winter

Have your heating system serviced regularly. A professional cleans the burner, checks the flue, and optimizes the settings. This helps maintain efficiency and prevent costly repairs.

Check the pressure in your heating system. The pressure gauge should be in the green zone. If the pressure is too low, you need to top up the heating water.

Don’t turn your radiators off completely in summer. Leave them on the frost-protection setting to help prevent corrosion inside the system.

Save on heating costs with a smart home

Smart heating control starts with wireless thermostats. They let you control each radiator individually from anywhere using an app. The system learns your habits and adjusts heating schedules automatically.

Window sensors are a useful addition. When you open a window, a sensor automatically turns off the heating in that room, preventing energy waste.

You can also integrate your heating system with weather services. It responds to falling outdoor temperatures before the room gets cold, helping maintain comfort and avoid peak energy demand.

Monitor your energy use

Modern systems display your energy use in real time, so you can see right away which measures are working. The data can help you fine-tune your energy habits.

Alerts can warn you when a window is open while the heating is on and flag unusually high energy use. This helps you spot appliances that use a lot of energy.

You can combine the system with other devices. Lower the living room temperature when you start a home theater session, and the lights dim automatically. The result is a seamless, energy-efficient setup.

For all your home and garden projects, find the right products and more inspiration in our extensive shop.

Frequently Asked Questions

How are heating costs calculated on a bill?
Heating costs consist of fixed costs (30-50%) and usage-based costs (50-70%). Fixed costs cover expenses such as maintenance and are often allocated according to floor area. Usage-based costs are calculated from your radiator readings. Using less energy directly reduces this part of your bill.
What can I do if my heating bill is too high?
First, check the meter readings and billing period for errors. Make sure all radiators have been properly bled. A professional can balance your heating system to improve heat distribution. Lowering the room temperature by 1 degree saves around 6 percent of energy.
How can I save on heating without getting cold?
Lower the temperature to 16-18 degrees at night. Air out rooms briefly for 5 minutes several times a day with the thermostats turned down. Bleed radiators that make gurgling noises. Use programmable thermostats and seal drafty windows. These steps reduce energy use without sacrificing comfort.
Should I check my heating bill?
Yes, it’s essential to check your bill. Compare your own meter readings, the numbers on the heat cost allocators, and the total charges. Errors in transferring or allocating data can happen. If anything is unclear, ask your landlord or property manager for an itemized breakdown based on your usage.
Which products can help me save on heating costs?
A radiator key removes air from the heating system. Programmable thermostats control the temperature as needed. Weatherstripping prevents drafts. Reflective foil behind radiators directs heat into the room. You can find these products in our shop.
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