Heating Glossary Terms

What Does BTU Mean for Heaters?

BTU (British Thermal Unit) measures a heater's heat output — roughly, how much energy it can deliver per hour. A higher BTU rating generally suits a larger room or outdoor area, while an undersized BTU rating for the space will struggle to warm it effectively, so checking BTU against room size is a more useful comparison than wattage alone.

What Is a TRV (Thermostatic Radiator Valve)?

A TRV is a valve fitted to a radiator that automatically regulates flow based on the room's temperature, letting each radiator in a home be set to a different comfort level independently of the main boiler thermostat. Turning a TRV down in unused rooms is a common way UK households reduce heating costs without adjusting the whole system.

What is WiFi?

WiFi, when listed for home & garden products, refers to the ability of that product to connect to your home's internet network wirelessly. It allows you to control and monitor the device remotely using a smartphone app or voice assistant – typically via an existing WiFi router in your property. When considering a product with WiFi connectivity, think about the strength of your WiFi signal where it will be used; a weak signal could lead to intermittent operation. Also, ensure that your home's internet network is compatible with the device’s requirements.

What is 2kW?

2kW refers to the power rating of an electrical appliance – kilowatt being a unit of energy consumption. Specifically, 2kW means the device can deliver 2,000 watts of power when operating at its rated voltage (typically 230V in the UK). This is a measure of how quickly the device converts electricity into heat or light. Higher kW figures generally indicate a stronger heating effect but also mean greater energy consumption and potentially higher running costs. Consider this alongside other specifications, such as the size of the appliance and its intended use, to determine if it’s suitable for your needs.

What is Gas?

In the context of home & garden products like BBQs and patio heaters, "Gas" refers to the fuel source used for operation – specifically, liquefied petroleum gas (LPG) or propane. It indicates that the appliance is designed to burn this gaseous fuel instead of solid fuels such as charcoal or electricity. UK buyers should understand that gas appliances require a supply of refillable cylinders, and ongoing maintenance involves checking cylinder levels and ensuring proper ventilation when in use. Gas appliances are generally lighter than their electric counterparts but can be more susceptible to weather conditions affecting performance.