Why Summer Is the Best Time to Replace Your Radiators

It sounds counterintuitive, but the best time to buy radiators isn't when your current ones are struggling through a cold snap, it's during the warmer months, typically late spring through summer. Around 60% of our radiator sales take place between September and November, which is exactly why we encourage customers to plan earlier. Demand is lower, installers have more availability, and you've got time to get sizing and style choices right before you actually need the heat. Many heating engineers experience their busiest period between September and January

Why Everyone Buys Radiators at the Wrong Time

There's a predictable pattern that we see every single year. As soon as temperatures drop, heating becomes urgent rather than optional. Boilers get switched on, cold spots become obvious, and suddenly a radiator that's been quietly underperforming for months is a household emergency.

That timing creates knock-on problems:

• Installers get booked up. Plumbers and heating engineers are busiest in the run-up to winter, so getting someone out quickly becomes harder.

• Decisions get rushed. When a room is genuinely cold, it's tempting to grab whatever's available rather than the radiator that actually suits the space.

None of this is a problem in July. A heatwave, ironically, is one of the calmest possible times to plan.

The Case for Sorting Heating While It's Warm

1. You've got time to measure properly. Radiators are usually sized using BTU (British Thermal Unit) calculations. Room dimensions, window area, insulation levels and external walls all affect the required heat output. In our experience, customers get better results when they're not doing this calculation in a cold, uncomfortable room under time pressure.

2. Installation is far less disruptive. Fitting a new radiator usually means draining part of the system, which briefly leaves that room without heat. In summer, that's a non-issue. In January, it's a genuinely unpleasant few hours.

3. You can plan around your renovation, not around the weather. If you're redecorating, replacing flooring, or doing any wider home improvement work over the summer, it's the natural point to swap out an old radiator too, rather than working around one that's already installed.

Browse our full radiator range.

What to Actually Check Before You Buy

Whether you're replacing a single radiator or planning a whole-house upgrade, a few things are worth thinking through now while there's no pressure:

• Room-by-room heat loss. An older, solid-wall Victorian terrace will need a different approach to a modern, well-insulated new build. According to the Energy Saving Trust, around a third of a home's heat loss happens through the walls, which is why an older solid-wall property will typically need a different radiator approach to a modern, cavity-insulated one. [Source: Energy Saving Trust]

• Style and finish. Column radiators suit period properties well, while flat panel or designer options tend to work better in contemporary spaces. This is a much easier decision to make when you're not just trying to get heat back on quickly.

• Existing pipework and valve positions. If you're replacing a radiator rather than starting from scratch, checking that a new model's valve and pipe connections line up with what's already there can save an installer extra work, and cost, on the day.

A Sensible Summer Checklist

If you're thinking about your heating this summer, it's worth:

• Measuring the rooms you're considering upgrading

• Checking whether your current radiators are underperforming (cold spots, uneven heat, or gurgling noises are all signs worth investigating)

• Getting quotes from installers while their diaries are quieter

• Ordering ahead of any autumn renovation or redecoration plans

You don't need to replace your radiators immediately, but planning ahead now avoids rushed decisions when colder weather arrives.

In Short

A heatwave might be the last thing on your mind when it comes to heating, but it's actually the ideal window to measure up, compare options, and get any installation booked in before the autumn rush begins. By September many installers begin filling their diaries for autumn boiler servicing and heating upgrades. Take advantage of the calm before the cold sets in.

FAQs

Is it actually cheaper to buy radiators in summer?

Prices vary by retailer and product, but demand for heating products tends to be lower in summer, which generally means better availability and less competition for installer time compared to the autumn and winter rush.

Will I need to turn my heating off to fit a new radiator?

Yes, fitting or replacing a radiator usually means briefly draining that part of the central heating system. Doing this in summer avoids any loss of heating comfort, unlike a winter installation.

How long does it take to have a radiator fitted?

A straightforward like-for-like swap can often be done in a few hours, while a full room upgrade involving pipework changes may take longer. Booking in summer gives more flexibility around scheduling.

Should I replace all my radiators at once, or one room at a time?

Either approach works. Many homeowners tackle one or two rooms per year, using quieter periods like summer to plan and install without pressure.

How do I know if my current radiator is underperforming?

Cold spots (especially near the bottom), uneven heat across the radiator, or a radiator that never gets fully hot can all indicate it's undersized, needs bleeding, or the system needs balancing.

Not sure what size radiator you need? Use our BTU calculator or speak to our team before ordering.