Energy saving home tips to cut your bills today

The fastest route to lower energy bills costs nothing at all. Switch appliances off standby, boil only the water you need, shorten your shower, and turn your thermostat down by 1°C. Add a few low-cost fixes — draught-proofing, LED bulbs, full washing machine loads — and the Energy Saving Trust estimates these ten quick actions could save a substantial amount per year for a typical household in Great Britain.

Here are the eight actions to start with today:

Switch off standby. Televisions, games consoles, and phone chargers left on standby draw power around the clock.
Boil only what you need. Overfilling the kettle is one of the most common and easily fixed energy habits in the kitchen.
Shorten your shower. Cutting a daily shower from eight minutes to four saves both water-heating energy and water itself.
Run full loads only. A half-empty dishwasher or washing machine uses almost as much energy as a full one.
Line-dry laundry. The tumble dryer is one of the most energy-hungry appliances in the home; avoiding its use regularly can save a noticeable amount on energy bills.
Fit LED bulbs. Replacing every remaining halogen or incandescent bulb with an LED is a one-time, low-cost change that pays back quickly.
Draught-proof gaps. Self-adhesive foam strips around doors and windows cost a few pounds and make an immediate difference to comfort.
Lower the thermostat by 1°C. A single degree reduction is barely perceptible in comfort terms but delivers a meaningful reduction in heating costs.

Together, these habits and small purchases form the foundation of any effective home energy efficiency plan. The sections below show you how to go further, room by room, and where to find grant support for bigger upgrades.

Key takeaways

The most effective approach to reducing household energy bills is to exhaust zero-cost behavioural changes first, then progress through low-cost DIY fixes, targeted upgrades, and professional retrofit in that order.

Point	Details
Start with zero-cost habits	Thermostat –1°C, standby off, shorter showers, and full loads can save up to £313 a year combined.
Low-cost DIY delivers fast payback	Draught-proofing, LED bulbs, a cylinder jacket, and chimney excluders typically cost under £150 total.
Heating controls matter most	Scheduling, TRVs, and combi flow-temperature adjustment reduce heating costs with little or no spend.
Insulation is the long-term priority	Loft top-up and cavity wall insulation deliver the largest sustained savings; always get a Retrofit Assessor first.
Grants can cover major upgrades	ECO, the Great British Insulation Scheme, and the Boiler Upgrade Scheme reduce or eliminate upfront costs for eligible households.

What are the best no-cost energy saving home tips?
Room-by-room energy efficiency tips for every part of your home
How do heating controls and hot water settings cut your bills?
Does insulation really make the biggest difference to heat loss?
How do appliances and lighting affect your energy bills?
Can window coverings genuinely reduce heat loss?
How should you prioritise energy-saving measures?
Where can you get grants and financial help for energy upgrades?
How much could you realistically save? Three example scenarios
Energy-saving myths that could be costing you money
An installer’s perspective on what actually works
Thinking about shutters that work harder for your home?
Sources
FAQ

What are the best no-cost energy saving home tips?

The most powerful energy conservation strategies require no tools, no tradespeople, and no upfront spend. They are habits, and habits compound.

Standby and idle devices. Plug-in smart sockets or a simple power strip with a switch make it easy to cut power to a cluster of devices at once. The saving is modest per device but adds up across a household.
Kettle discipline. Fill to the cup line, not the maximum. Over a year, this single habit saves a meaningful amount of electricity for a household that brews frequently.
Four-minute showers. A shower timer (often free from water companies) keeps this habit consistent. Pair it with a low-flow aerator showerhead — a fitting that costs under £20 and reduces hot-water use without noticeably affecting pressure.
Washing machine temperature. Dropping from 40°C to 30°C uses roughly a third less electricity per cycle, and modern detergents are formulated to work effectively at the lower temperature.
Dishwasher eco mode. The eco cycle on most modern dishwashers uses less energy than a quick wash, despite taking longer. Run it only when full.
Air-dry clothes. When the tumble dryer is unavoidable, clean the filter before every use — a blocked filter forces the machine to work harder and longer.
LED lighting. A single LED bulb uses around 75–80% less energy than the halogen it replaces and lasts far longer. Replacing all remaining halogens in a typical home can save around £40 a year on lighting costs alone.
Draught-stopping. Keyhole covers, letterbox brushes, and chimney draught excluders are inexpensive and tackle some of the most overlooked gaps in a home’s thermal envelope.

Pro Tip: The biggest single return from quick wins comes from combining shorter showers with a low-flow aerator showerhead. The aerator reduces the volume of hot water used per minute, so even a five-minute shower with an aerator uses less energy than a four-minute shower without one.

Reducing the thermostat by 1°C is consistently highlighted by the Energy Saving Trust as a high-impact, low-discomfort action — one that costs nothing to implement and delivers savings every day the heating runs.

Room-by-room energy efficiency tips for every part of your home

Generic advice only goes so far. Applying specific actions in each room gives you a clearer picture of where your energy actually goes and where the best returns are.

Kitchen

The kitchen is typically the most energy-dense room in the house, with multiple appliances running simultaneously.

Use the microwave or air fryer for small meals rather than heating a full oven. An oven uses roughly three to four times more energy than a microwave for the same reheating task.
Keep fridge and freezer coils dust-free and ensure door seals are airtight. A fridge working harder than it needs to runs continuously rather than cycling off.
Defrost the freezer regularly. A thick layer of ice forces the compressor to work harder.
Switch off the oven five to ten minutes before the end of cooking time; residual heat finishes the job.
Unplug phone chargers, toasters, and coffee machines when not in use. These draw a small but continuous standby current.

Bathroom

Hot water is the second-largest energy cost in most homes after space heating.

A four-minute shower uses significantly less hot water than a bath. If you prefer baths, fill to a shallower depth.
Fit a low-flow aerator showerhead to reduce hot-water consumption without sacrificing pressure.
If your home has a hot-water storage cylinder (common in older properties), check it has a British Standard insulating jacket fitted. An uninsulated cylinder loses heat continuously, even when no hot water is being drawn.
Set the cylinder thermostat to 60°C — hot enough to prevent Legionella growth, but no hotter than necessary.

Living areas

Move furniture away from radiators. A sofa pushed against a radiator absorbs heat that should be circulating into the room.
Use heavy curtains or well-fitted interior shutters to retain warmth after dark. Closing them at dusk traps the day’s heat and reduces cold convection from the glazing surface.
Replace any remaining incandescent or halogen bulbs with LEDs. Use task lighting (a desk lamp or reading light) rather than overhead lighting when only one area of the room is in use.
Check that plug sockets on external walls have draught-proof covers fitted — cold air can enter through the back of a socket box.

Laundry

Wash at 30°C wherever the garment label permits. This uses around a third less electricity than a 40°C cycle.
Always run a full load. A half-load uses nearly as much energy and water as a full one.
Line-dry or use an airer whenever possible. If you must use a tumble dryer, spin clothes at the highest spin speed the fabric allows before loading — drier clothes need less drying time.
Heat-pump tumble dryers use roughly half the energy of conventional vented or condenser models and are worth considering when replacing an ageing machine.

How do heating controls and hot water settings cut your bills?

Heating accounts for the largest share of a typical household’s energy bill, and the controls governing it are where the most impactful changes can be made at little or no cost.

The core principle is straightforward: heat only the spaces you are using, only when you are using them, and only to the temperature you actually need. Small adjustments to how you programme and set your heating system can deliver savings that dwarf most other behavioural changes.

Thermostat setting. Set the room thermostat to the lowest comfortable temperature — typically 18–21°C for living areas. Each degree reduction saves a meaningful amount on annual heating costs, as the Energy Saving Trust’s guidance on heating controls confirms.
Heating schedule. Programme the boiler to come on 30 minutes before you need warmth and switch off 30 minutes before you leave or go to bed. The thermal mass of the building holds heat for longer than most people expect.
Thermostatic radiator valves (TRVs). Fitting TRVs to individual radiators lets you zone heating by room — keeping bedrooms cooler than living areas, for instance. TRVs are a low-cost DIY upgrade for most standard radiators.
Bleed radiators. Trapped air in a radiator creates a cold patch at the top and forces the boiler to run longer to reach the set temperature. Bleeding is best done in summer when the system is cool, using a simple radiator key that costs under £2.
Combi boiler flow temperature. Many combination boilers are factory-set with a flow temperature of 80°C or higher. Reducing this to around 55–60°C (where the system is designed to allow it) can improve efficiency noticeably, particularly in homes with modern radiators sized for lower-temperature operation. Check your boiler manual or consult a Gas Safe registered engineer before adjusting this setting.
Hot-water cylinder thermostat. If your home has a stored hot-water cylinder, set its thermostat to 60°C. Higher settings waste energy; lower settings risk bacterial growth.

Safety note: Any work on gas boilers, flues, or gas pipework must be carried out by a Gas Safe registered engineer. Adjusting flow temperature settings on the boiler itself is generally safe for a competent homeowner to do via the boiler’s controls, but if you are unsure, ask your annual service engineer to set it correctly.

Clearing furniture from in front of radiators and ensuring curtains do not hang over them also makes a measurable difference — heat directed into soft furnishings or out through cold glass is heat you have paid for but not benefited from.

Does insulation really make the biggest difference to heat loss?

Yes — and the fastest-payback insulation measures are often the cheapest. Heat escapes through the roof, walls, floors, and gaps around windows and doors, but not equally. Roughly a quarter of heat loss in an uninsulated home escapes through the roof, making loft insulation the single highest-return measure for most properties.

Quick, high-return DIY insulation actions

Loft insulation top-up. The recommended depth is 270mm of mineral wool. Many older homes have 100mm or less. Topping up to the recommended depth is a straightforward DIY task and one of the most cost-effective upgrades available, as Which? highlights in its insulation guidance.
Hot-water cylinder jacket. An uninsulated cylinder loses heat continuously. A British Standard 80mm insulating jacket costs around £15–£25 and pays back within weeks.
Pipe insulation. Foam lagging on hot-water pipes in unheated spaces (loft, garage, under floors) is inexpensive and prevents heat loss between the boiler and the tap.
Chimney draught excluders. An unused fireplace with an open flue acts like a permanent open window. Inexpensive inflatable or balloon-style chimney draught excluders block the flue when the fireplace is not in use and are a high-value DIY measure for homes with unused fireplaces.
Draught-proofing gaps. Self-adhesive foam strips, silicone sealant around window frames, and brush strips on letterboxes and keyholes are all low-cost and effective.

When to consider professional insulation

Cavity wall insulation and solid-wall insulation require professional installation and a retrofit assessment to confirm suitability. Cavity wall insulation is typically appropriate for homes built between the 1930s and 1990s with an unfilled cavity; solid-wall insulation (internal or external) suits older stone or brick properties. Both measures deliver long-term savings but involve higher upfront costs and should be assessed by a qualified Retrofit Assessor before committing.

Independent guidance from the government recommends using accredited installers and seeking impartial advice before proceeding with larger capital upgrades — getting multiple quotes and a proper assessment protects you from unsuitable or overpriced solutions.

Measure	Typical DIY/install cost	Estimated annual saving	Notes
Loft insulation top-up (to 270mm)	£500 installed	£150	DIY possible; grant funding often available
Hot-water cylinder jacket	£15–£25	£30–£50	DIY; quick payback
Pipe insulation (loft/garage)	£10–£30	£10–£20	DIY
Chimney draught excluder	£15–£30	£50	DIY; high return for unused fireplaces
Draught-proofing (doors/windows)	£50	£45	DIY or professional
Cavity wall insulation	£500	£150	Professional only; grant funding may apply

Figures are indicative estimates based on typical UK properties and energy prices; actual savings vary by property size, construction, and energy tariff.

How do appliances and lighting affect your energy bills?

Appliances and lighting together account for a significant share of household electricity use, and the gap between an efficient and an inefficient approach to both is larger than most homeowners realise.

Appliance habits that reduce consumption

Run dishwashers and washing machines only when full, and use the eco or 30°C cycle.
Descale the kettle regularly. Limescale acts as an insulator on the heating element, forcing it to work harder and longer to boil the same volume of water.
Keep fridge and freezer seals clean and intact. A damaged seal lets cold air escape, causing the compressor to run almost continuously.
Avoid leaving devices on standby. A television on standby for 20 hours a day still draws power; multiplied across a household of devices, the cumulative draw is worth addressing.
When replacing appliances, prioritise energy labels. An A-rated washing machine or fridge-freezer costs less to run annually than a D or E-rated equivalent, and the running-cost difference over a ten-year lifespan often exceeds the price premium.

Lighting: the LED switch

Switching from halogen to LED is one of the highest-return, lowest-effort changes available. A typical LED bulb uses around 75–80% less energy than the halogen it replaces and lasts up to 25 times longer. For a home with 20 halogen downlighters, replacing them all with LEDs can save around £40 a year on electricity costs alone.

Motion sensors in hallways, utility rooms, and external areas prevent lights being left on in unoccupied spaces. Dimmer switches compatible with LED bulbs allow further reductions in living areas where full brightness is rarely needed.

Understanding energy labels: The EU-derived energy label used in the UK rates appliances from A (most efficient) to G. When comparing two models, check the estimated annual energy consumption figure (in kWh) on the label rather than relying on the letter grade alone — a large A-rated appliance may use more energy than a small B-rated one.

Can window coverings genuinely reduce heat loss?

Well-fitted interior window coverings reduce heat loss through glazing more effectively than most homeowners expect, and the mechanism is straightforward. Glass is a poor insulator. On a cold night, the surface of a single-glazed pane can drop close to the outside temperature, creating a convection current that draws warm room air downward and across the floor. A close-fitting shutter or heavy thermal curtain interrupts that convection by trapping a layer of still air between the covering and the glass.

The thermal benefit depends on fit. A curtain that hangs loosely away from the wall allows warm air to circulate behind it and escape at the top, largely negating the insulating effect. A well-fitted interior shutter, by contrast, sits within or close to the window reveal and creates a more effective air-gap seal around the frame.

Well-fitted interior shutters create a trapped air gap between the shutter panel and the glazing surface, reducing convection-driven heat loss and allowing homeowners to maintain comfort at a slightly lower thermostat setting. For homes with older single glazing or large window areas, this effect is most pronounced — and the combination of thermal benefit with light control and privacy makes shutters a practical, long-term investment rather than a purely decorative one.

For homes with large glazed areas, bay windows, or older single glazing, the thermal contribution of quality window coverings is particularly meaningful. Closing shutters or heavy curtains at dusk consistently reduces the rate at which a room cools overnight.

Shutter World’s energy-efficient window coverings guide explains the practical differences between covering types in detail, and their interior shutters and energy savings resource sets out realistic expectations for different property types.

Questions to ask before commissioning window coverings for thermal performance

What is the fitting tolerance between the shutter panel and the window reveal? A tighter fit delivers better thermal performance.
Does the product carry any independent thermal or U-value data?
What guarantees cover the product and the installation workmanship?
Has the installer considered ventilation? Tightly fitted coverings in rooms with poor natural ventilation can contribute to condensation if not specified correctly.
For unusual window shapes (arched, angled, bay), how is the bespoke element engineered to maintain the air-gap seal at the edges?

Shutter World has over 25 years of experience fitting bespoke shutters across a wide range of window types, including arched, bay, and skylight configurations where precision fitting is critical to both thermal performance and appearance. Their plantation shutters range covers the full spectrum from entry-level to premium hardwood, with every shutter made to measure for the specific window.

How should you prioritise energy-saving measures?

The most cost-effective approach is staged: exhaust zero-cost and low-cost actions first, then progress to DIY improvements, and only then consider professional retrofit. Rushing to a heat pump or external wall insulation before addressing draught-proofing and heating controls is a common and expensive mistake.

The Low Carbon Hub’s guidance on home energy efficiency frames this well: treat efficiency as a journey, starting with behaviour and simple fixes, then moving to whole-house thinking when the quick wins are exhausted.

Weeks 1–2: Zero-cost behavioural changes. Thermostat reduction, heating schedule, standby habits, shower time, full loads, kettle discipline. Cost: £0. Potential saving: up to £313/year combined.
Weeks 2–4: Low-cost DIY fixes. Draught-proofing strips and brushes, chimney draught excluder, LED bulb replacement, hot-water cylinder jacket, pipe insulation, radiator bleeding. Cost: typically £50–£150 total.
Months 1–3: Low-cost upgrades. TRV installation, smart thermostat or programmable timer, low-flow showerhead, window covering improvements (thermal curtains or shutters). Cost: £100–£500 depending on scope.
Months 3–12: Assess for professional measures. Book a Retrofit Assessor to evaluate loft insulation top-up, cavity wall insulation, and heating system performance. Use the gov.uk energy-saving service to get personalised recommendations and estimated costs before committing.
When grants are available: Major upgrades. Boiler replacement, heat pump installation, solid-wall insulation, solar panels. These require professional installation, grant support where available, and a whole-house retrofit plan.

The key discipline is not skipping stages. A homeowner who installs a heat pump in a draughty, poorly insulated house will spend more on running it than they save compared with a well-controlled gas boiler in a properly sealed home.

Where can you get grants and financial help for energy upgrades?

Several government-backed schemes reduce or eliminate the upfront cost of major energy-saving measures, and understanding historical schemes like the Green Homes Grant can help homeowners navigate current grant-type programmes. Eligibility varies by scheme, property type, income, and location, so checking each one individually is worth the time.

The Gov is the single best starting point: it lists all current schemes, explains delivery models, and links to eligibility checkers.

Energy Company Obligation (ECO). A supplier-funded scheme that helps eligible households access insulation and low-carbon heating. Ofgem administers ECO and eligibility is typically determined by a retrofit assessment. Contact your energy supplier or a local authority to start the process.
Great British Insulation Scheme. Targets homes with an Energy Performance Certificate (EPC) rating of D or below. Delivers insulation measures (loft, cavity wall, solid wall) through approved installers. Check eligibility via the gov.uk service or your energy supplier.
Boiler Upgrade Scheme. Provides a grant towards the cost of replacing a gas or oil boiler with a heat pump or biomass boiler. The scheme is delivered through MCS-certified installers; the installer applies on your behalf.
Warm Homes: Local Grant and Warm Homes: Social Housing Fund. Part of the government’s Warm Homes Plan, these target low-income households and social housing with a range of energy-efficiency measures. Delivered through local authorities and social landlords.
Home Energy Scotland. For Scottish residents, Home Energy Scotland offers free advice, cashback grants, and interest-free loans for energy-efficiency improvements. Contact them via their helpline or website for region-specific guidance.
MoneySavingExpert. Martin Lewis’s MoneySavingExpert site maintains an up-to-date guide to energy grants and tariff switching that is worth checking alongside official sources, particularly for tariff and billing advice.
Octopus Energy. Octopus Energy offers its own energy-efficiency products and smart tariffs (including Agile Octopus, which prices electricity by the half-hour) that can reduce bills for households with flexible usage patterns or electric vehicles.

Practical steps to access support:

Check your EPC rating (available free at the gov.uk EPC register).
Use the Gov to see which improvements are recommended for your property and their estimated costs and savings.
Contact your energy supplier to ask about ECO eligibility.
For larger measures, book a qualified Retrofit Assessor before committing to any installer.

How much could you realistically save? Three example scenarios

Savings depend on property size, construction type, current energy tariff, and how many measures you implement. The three scenarios below use the types of measures described in this guide and are illustrative of the ranges a typical UK household might expect.

How the figures are derived: The quick-wins figure comes directly from the Energy Saving Trust’s published estimate. The DIY and retrofit ranges add indicative savings from individual measures (cylinder jacket, pipe insulation, insulation upgrades) based on typical UK property performance. Actual results vary by property age, size, and energy tariff — a larger detached house will see proportionally higher savings than a small flat.

The simple formula: identify your current annual energy spend, apply the percentage reduction each measure typically delivers, and sum the results. The gov.uk personalised tool does this calculation for your specific property and is the most reliable way to get a tailored estimate.

Energy-saving myths that could be costing you money

A handful of persistent misconceptions lead homeowners to waste money or, in some cases, create problems that are more expensive to fix than the original inefficiency.

Myth: Leaving the heating on low all day is cheaper than heating to temperature when needed.
Fact: A well-insulated home holds heat reasonably well, but most UK homes lose heat faster than a continuously running low-level system replaces it. Heating to your desired temperature on a schedule and letting the house cool between periods is almost always more efficient. The one exception is a very well-insulated, airtight home where the thermal mass is high — but even then, a smart thermostat manages this better than a flat low-level setting.

Myth: Turning the thermostat up high heats the room faster.
Fact: A boiler operates at full output regardless of the thermostat setting. Setting it to 25°C instead of 20°C does not heat the room faster; it simply means the boiler runs for longer before switching off.

Myth: Making the home airtight is always better.
Fact: Airtightness and ventilation must be balanced. Sealing every gap without providing controlled ventilation can lead to condensation, damp, and poor indoor air quality. Retrofit thinking, as the Low Carbon Hub explains, considers indoor air quality and controlled ventilation alongside airtightness — not just one in isolation.

Myth: New boilers always pay for themselves quickly.
Fact: A new boiler in a draughty, poorly insulated home will perform better than an old one, but the payback period is long. Insulation and draught-proofing first, then boiler replacement, is the correct sequence for most properties.

Common practical mistakes to avoid:

Over-sealing a room without fitting trickle vents or an extractor fan, leading to condensation on cold surfaces.
Setting combi boiler flow temperature too low without checking whether the radiators are sized for lower-temperature operation — undersized radiators at 55°C flow temperature will not heat the room adequately.
Choosing an installer based on price alone. For insulation and heating measures, always use a TrustMark-registered or MCS-certified installer and ask for references.

Pro Tip: Before hiring any contractor for insulation or heating work, check the TrustMark register and ask for a written specification of the work, the materials to be used, and the expected performance outcome. A reputable installer will provide all three without hesitation.

An installer’s perspective on what actually works

The homeowners who see the biggest, most lasting reductions in their energy bills share one habit: they start with the basics before spending on technology. Every year, we see households invest in smart thermostats and heat pumps while their loft hatch is uninsulated, their radiators are bleeding heat into the back of a sofa, and their boiler flow temperature is set at 80°C from the factory. The technology works — but it works far better in a home that has already addressed the fundamentals.

The single most practical tip we give every homeowner is this: measure before you buy. Whether you are fitting draught-proofing strips, ordering a hot-water cylinder jacket, or commissioning bespoke window shutters, accurate measurements are the difference between a fitting that performs as intended and one that leaves gaps. For window coverings in particular, a professional in-home survey removes the guesswork entirely and ensures the thermal and aesthetic benefits are fully realised.

At Shutter World, our free in-home survey is the starting point for every project. It is not a sales visit — it is a precision exercise that ensures every shutter we fit delivers on its promise, whether that promise is thermal performance, light control, or the kind of craftsmanship that stands the test of time.

Thinking about shutters that work harder for your home?

Interior shutters are one of the few home improvements that deliver thermal performance, privacy, light control, and lasting visual appeal in a single, made-to-measure fitting. For homes with large glazed areas, bay windows, or older single glazing, the difference a well-fitted shutter makes to comfort and heating costs is tangible from the first cold night.

Shutter World has spent over 25 years crafting bespoke interior shutters for homes across the UK, from straightforward sash windows to the most architecturally complex shapes. Every shutter is made to measure, fitted by experienced professionals, and backed by product and workmanship guarantees.

Whether you are exploring plantation shutters for a classic finish or need a solution for a challenging bay or arched window, our team is ready to help. Explore our energy-efficient shutters guide to understand the thermal benefits in detail, or take the first step and book your free in-home survey today.

Book your free survey at Shutterworld

Sources

Official and authoritative resources to verify details and get personalised guidance:

This article is general information, not a substitute for advice from a qualified financial advisor. Consult a qualified financial professional about your own circumstances before acting on anything here.

FAQ

What are the quickest ways to save energy at home for free?

Switch appliances off standby, reduce your thermostat by 1°C, shorten showers, and run full loads in the washing machine and dishwasher. The Energy Saving Trust estimates these and similar no-cost actions can save up to £313 a year in Great Britain.

What is the 4pm rule on heating?

The “4pm rule” is an informal guideline suggesting you avoid turning the heating on before 4pm during milder weather, relying on daytime solar gain and the building’s thermal mass to maintain comfort. It is not an official standard, but it reflects the broader principle of heating on a schedule rather than continuously.

What wastes the most electricity in a typical house?

Space heating and hot water account for the largest share of energy costs overall, but among electrical appliances, tumble dryers, electric showers, and electric ovens are the heaviest consumers. Leaving multiple devices on standby adds up across a household, though the per-device draw is small.

What are Martin Lewis’s top energy-saving tips?

MoneySavingExpert’s guidance (associated with Martin Lewis) consistently emphasises checking tariff deals, using the gov.uk energy-saving tool for personalised recommendations, and applying for ECO or Great British Insulation Scheme support if eligible. The underlying advice aligns with the Energy Saving Trust’s quick-wins approach: behaviour first, then low-cost fixes, then grants for bigger measures.

Do interior shutters actually help reduce heating bills?

Well-fitted interior shutters create an insulating air gap between the shutter panel and the glazing, reducing convection-driven heat loss — particularly noticeable in homes with single glazing or large window areas. Closing them at dusk helps retain the day’s warmth and can allow a slightly lower thermostat setting without a reduction in comfort.