Best Patio Heaters — 13.5kW (2026)
1 patio heaters matching power “13.5kW”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Patio Heater UK (2026) guide.
These powerful 13.5kW patio heaters are designed to deliver significant heat for outdoor spaces. Featuring a high-wattage output, they’re ideal for rapidly warming up patios and gardens during cooler evenings. Constructed with durable materials, these heaters offer robust performance and longevity, perfect for extending your usable outdoor area.
This specific model boasts a powerful 13.5kW heating capacity, capable of quickly generating substantial warmth. It's suitable for larger patio areas or those requiring rapid heat deployment. The heater includes safety features like overheat protection to ensure responsible use and prevent damage.
Remember to always follow the manufacturer’s instructions for safe operation and consider appropriate spacing when using this high-output heater. Always prioritise safety when operating any outdoor heating appliance.
#1 Pick
REALGLOW Spiral Flame Gas Patio Heater 13.5kW (Black with Black Cover)- 13.5kW
£249.99
Pros
- Patented spiral real-flame effect gives a striking visual centrepiece
- Wheels make it easy to reposition around the patio
- Includes hose and 27mm clip-on propane regulator
Cons
- Gas cylinder not included
- Heavy once assembled — best kept in one spot
FAQ
What kind of fuel does this 13.5kW patio heater use?+
These heaters typically operate on propane or natural gas, requiring a suitable connection and regulator. Check the manufacturer’s specifications for compatibility before purchasing.
How long will it take to heat up a patio?+
Due to the 13.5kW power output, these heaters can rapidly warm an area – typically within 10-20 minutes depending on ambient temperature and wind conditions.
Are there any safety features built into this heater?+
Most models include overheat protection and a cool-touch housing to minimize the risk of burns. Always operate with caution and keep children and pets away.
What size patio area is suitable for this heater?+
The 13.5kW capacity is best suited for medium to large patios, approximately 20m² or more, though this will vary depending on the enclosure and external conditions.
Can I use this heater in a covered area?+
While possible, it’s generally not recommended due to increased condensation risk. Ensure adequate ventilation if using in a partially enclosed space.
How do I clean the patio heater?+
Regularly wipe down the exterior with a damp cloth and mild detergent. Avoid spraying directly onto electrical components – unplug before cleaning.
What is the warranty on this 13.5kW patio heater?+
Warranty terms are determined by the manufacturer and retailer; please refer to the product packaging or Amazon's standard returns policy for details.
Does this heater require professional installation?+
Installation depends on your gas supply setup – some users may be able to install it themselves, while others might need a qualified gas engineer.
What are the operating temperatures of this heater?+
These heaters can operate effectively down to approximately -10°C, though performance will decrease in colder conditions. Always check manufacturer specifications.
How does the heater handle wind conditions?+
Wind can affect heating efficiency; position the heater strategically away from prevailing winds for optimal performance and safety – consider using a windbreak.