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Gas boilers are an integral part of many households, providing hot water and heat to a variety of spaces. When it comes to choosing a gas boiler, it is important to select one from a reliable and trusted brand. This article will provide an overview of the best gas boiler brands of 2021, based on customer reviews, performance ratings, and manufacturer warranties.When selecting a gas boiler, it is important to consider the size of the unit, the efficiency rating, and the warranty. Gas boilers come in a variety of sizes, from small units designed for single-room heating to larger units capable of heating an entire home. The efficiency rating of a gas boiler is an important factor to consider, as it determines how much energy is used to heat a space. Most gas boilers have an Annual Fuel Utilization Efficiency (AFUE) rating of 80% or higher, indicating that 80% of the energy used is converted into heat. Finally, it is important to check the manufacturer's warranty, as this will provide peace of mind in the event of a defect or malfunction.The following are some of the best gas boiler brands of 2021:

• Bosch: Bosch is one of the most popular gas boiler brands in the world, offering a wide range of models with AFUE ratings up to 95%. Bosch boilers come with a 10-year warranty, and their customer service is highly rated.
• Viessmann: Viessmann is another leading gas boiler brand, offering a variety of models with AFUE ratings up to 96%. Viessmann boilers come with a 10-year warranty, and their customer service is highly rated.
• Vaillant: Vaillant is a well-known gas boiler brand, offering a wide range of models with AFUE ratings up to 95%. Vaillant boilers come with a 10-year warranty, and their customer service is highly rated.
• Worcester Bosch: Worcester Bosch is a popular gas boiler brand, offering a variety of models with AFUE ratings up to 95%. Worcester Bosch boilers come with a 10-year warranty, and their customer service is highly rated.
• Ideal: Ideal is a well-known gas boiler brand, offering a variety of models with AFUE ratings up to 95%. Ideal boilers come with a 10-year warranty, and their customer service is highly rated.
• Potterton: Potterton is a reliable gas boiler brand, offering a variety of models with AFUE ratings up to 95%. Potterton boilers come with a 10-year warranty, and their customer service is highly rated.
• Glow-worm: Glow-worm is a popular gas boiler brand, offering a variety of models with AFUE ratings up to 95%. Glow-worm boilers come with a 10-year warranty, and their customer service is highly rated.
• Ariston: Ariston is a reliable gas boiler brand, offering a variety of models with AFUE ratings up to 95%. Ariston boilers come with a 10-year warranty, and their customer service is highly rated.

When selecting a gas boiler, it is important to consider the size of the unit, the efficiency rating, and the warranty. It is also important to read customer reviews and compare prices to ensure that you are getting the best value for your money. The brands listed above are some of the best gas boiler brands of 2021, and each one offers a variety of models that are sure to meet your needs.