Gas tumble dryers are one of four different types of tumble dryer you can buy.
The others are condenser, heat pump and vented.
The gas models we've tested from White Knight cost around £500.
Gas tumble dryers cost far less to run than most electric dryers.
On average, a standard electric vented tumble dryer will add around £66 to your annual energy bills.
A gas dryer uses almost no electricity and we estimate you’ll pay around £40 a year for gas, making it significantly cheaper to run.
However, if energy-efficiency is important for you, you may want to consider a heat pump dryer. They are the most efficient dryer type of all, with yearly energy costs as little as £25.
Even though gas tumble dryer running costs are low, bear in mind that you will need to pay a Gas Safe engineer to install one.
The installation charge will vary according to how much work it requires to safely run gas to where you want the dryer, but the cheapest quotes we found at the time of writing were between £100 and £150.