The best ways to heat a conservatory

More and more of us are adding conservatories to our homes as they provide a fantastic way of bridging that gap between house and garden.

Traditionally, conservatories were used mainly during the summer months. However, thanks to improvements in heating efficiency, insulation and radiator technology, they can now be comfortable, usable spaces all year round.

The challenge is that a conservatory behaves very differently to a standard room. With large areas of glazing and comparatively little solid wall, heat escapes more quickly. That means choosing the right heating solution isn’t just about style, it’s also about output, control and efficiency.

In this article, we’ll look at the best ways to heat your conservatory properly, whether you’re extending your central heating system or opting for a modern electric radiator.

Table of Contents

1. The thermal challenge of glass
2. Types of conservatory heating
• Central heating
• Electric heating
• Freestanding electric radiators
3. Choosing the right radiator for your conservatory
4. Underfloor heating
5. Comparison of conservatory heating options
6. General conservatory heating tips
7. Conservatory radiators at TradeRadiators.com

The thermal challenge of glass

A conservatory is effectively a glass-heavy structure attached to your home. Glass loses heat far more quickly than brick, which means a conservatory typically requires a higher heat output than a standard room of the same size.

This is where heat loss calculations become important. Choosing a radiator based purely on appearance or approximate room size can easily result in underheating the space.

Using our BTU heating calculator is strongly recommended when selecting a radiator for a conservatory. Because of the higher glass-to-wall ratio, you may find you need significantly more output than expected. Getting this right ensures the room feels warm and comfortable, rather than constantly “just a bit chilly”.

Types of conservatory heating

There are three main heating approaches to consider when improving conservatory warmth. The right one depends on your property, budget and how often the space is used.

1. Central heating

Central heating remains one of the most effective and economical long-term solutions, provided installation is practical.

If you’re building a new conservatory and already have central heating, extending the pipework during construction is often the most straightforward option. Incorporating copper pipes and installing a suitable radiator at this stage keeps disruption to a minimum.

If you’re retrofitting central heating into an existing conservatory, it’s important to speak to a professional heating engineer. Pipework may need to be run under floors or through walls, and costs can vary depending on layout and access.

In the UK,  to avoid being classified as an extension, conservatories connected to a home’s central heating system generally need to be able to be isolated from the rest of the house. This is usually achieved by ensuring the conservatory is seperated from the house with doors or walls that are adequately insulated. Having radiators or heaters with a thermostatic radiator valve (TRV) or an on/off switch is also necessary. Installing a TRV allows you to control the conservatory temperature independently. This prevents overheating in summer and avoids upsetting the balance of your home’s overall heating system.

Adding central heating is an excellent choice if logistics and budget allow, particularly if the conservatory is used daily as a living or dining space.

• Further reading: How to tell if your heating system is gas or electric

2. Electric heating

Electric radiators are no longer simply a fallback option as in many cases, they are the preferred solution for conservatories.

Modern electric radiators are highly efficient, straightforward to install and offer independent control. They don’t require pipework, which makes them far less disruptive to fit into an existing conservatory.

Because conservatories are often used intermittently such as in the evenings or at weekends, electric heating offers real precision. You can heat the room only when needed rather than running your full central heating system.

Most modern electric radiators are Lot 20 compliant, meaning they incorporate energy-saving features such as:

• 24/7 programmable timers
• Adaptive start
• Open window detection

Open window detection is particularly useful in conservatories. If doors are opened or a sudden drop in temperature is detected, the radiator will temporarily reduce output to avoid wasting energy.

Electric radiators must be installed by a qualified electrician, but once fitted, they provide excellent flexibility and control, especially in glass-heavy spaces that warm and cool quickly.

• Further reading: The best electric radiators

3. Freestanding electric radiators

Many conservatories have extensive glazing, leaving very little solid wall space available for a wall-mounted radiator, but this needn’t be a barrier to effective heating.

Freestanding electric radiators are an excellent solution when wall space is at a premium. They can be positioned in front of windows without permanent installation, making them perfect for conservatories with full-height glazing.

Because they’re portable, they can also be repositioned as furniture layouts change. For homeowners who don’t want to alter walls or run pipework, a freestanding electric radiator offers flexibility without compromise.

• Further reading: How efficient are electric radiators?

Choosing the right radiator for your conservatory

The style and dimensions of your radiator are just as important as the heating method itself.

Low-level radiators for short walls

Most conservatories feature a short brick 'dwarf' wall at the base of the glazing. Standard-height radiators may block glass panels or sit awkwardly.

Low-level radiators, usually around 200mm or 300mm high, are specifically designed for these spaces. They sit neatly along dwarf walls without obstructing your view of the garden.

Despite their reduced height, they can still deliver strong heat output when sized correctly. This makes them one of the most practical conservatory heating solutions available.

Horizontal radiators

If your conservatory allows for it, horizontal radiators remain a very popular choice.

A wide horizontal radiator can sit below the eyeline, preserving your outward view while delivering sufficient output. They tend to suit the proportions of conservatories particularly well and can be selected in various widths to match the available wall space.

When correctly sized using a BTU calculation, a horizontal radiator can comfortably heat the room without overwhelming it visually.

Space saving radiators

Small space saving  radiators are a strong aesthetic choice for conservatories.

Their slim projection means they don’t protrude far into the room which is helpful in narrower spaces where furniture placement is limited. They blend easily with the clean lines and glass-heavy design typical of conservatories.

Quiet, efficient and understated, space saving radiators are a practical option that won’t dominate the space.

Classic column radiators

If you’re looking to elevate the style of your conservatory, a classic column radiator can add character and elegance.

Column radiators are capable of delivering high heat output, making them suitable for rooms with greater heat loss. Their timeless appearance pairs particularly well with wicker furniture, soft furnishings and traditional décor schemes often found in conservatories.

They combine performance with presence.

Underfloor heating

Underfloor heating is another option worth considering, particularly in new builds or full refurbishments.

It provides an even, comfortable warmth and leaves walls completely free. However, it can be more expensive to install and is slower to respond than radiators. In a conservatory that heats up quickly in sunlight but cools rapidly at night, responsiveness can be important.

Underfloor heating works especially well beneath tiled floors and in conservatories used as primary living spaces.

Comparison of conservatory heating options

General conservatory heating tips

In addition to installing the right heating system, there are several practical steps that can significantly improve warmth and efficiency.

Improve insulation where possible

Even the best radiator will struggle against poor insulation. If your conservatory has a thin polycarbonate roof, upgrading to a solid or insulated roof system can dramatically reduce heat loss. Thermal blinds are also effective, particularly during winter evenings.

Use reflective foil behind radiators

If your radiator is mounted on a dwarf wall, adding reflective foil insulation behind it helps prevent heat escaping through the brickwork and directs warmth back into the room.

Make use of winter sunlight

Keep curtains and blinds open during sunny winter days to benefit from natural solar gain. Then close them at dusk to trap the warmth inside.

Seal draughts

Check doors and windows fit properly. Even small gaps can allow cold air to enter and warm air to escape. Draught excluders and proper seals make a noticeable difference.

Add soft furnishings

Thick rugs, carpets and lined curtains all help reduce heat loss and make the room feel warmer and more comfortable.

• Further reading: Are designer radiators efficient?

Conservatory radiators at TradeRadiators.com

Heating a conservatory effectively isn’t just about choosing a radiator that looks good, it’s about understanding the higher levels of heat loss that come with large areas of glazing and selecting a heating solution with enough output to compensate.

Whether you opt for central heating, a modern electric radiator or a flexible freestanding solution, the key is accurate sizing and the ability to control the temperature independently from the rest of your home. Using a BTU calculator is always a sensible starting point when selecting a radiator for a conservatory, as it helps ensure you choose a model powerful enough to keep the room comfortable during colder months.

At TradeRadiators.com, you’ll find a wide range of radiators suitable for conservatories, including horizontal radiators, low-level models designed for low walls, stylish column radiators and modern electric options. With the right radiator in place, your conservatory can become a warm and welcoming space to enjoy throughout the year, not just during the summer.