Type 21 vs. Type 22 Radiators: Which One Is Best for Your Space?

Understanding the difference between various types of radiators is crucial when choosing the one for your home. Types 21 and type 22 bathroom radiators are amongst the most popular choices in the UK. These radiator types are known for their efficiency in heating up the space.

In this blog, we will discuss the key differences, benefits, and considerations to help you to make an informed decision. 

1. Understanding The Convector Radiators:

Convector radiators are designed with a series of metal fins located either behind the front panel or between and behind the back panel. These fins are heated by the radiator panels, transferring heat to the surrounding air. The primary difference between traditional radiators and modern convection radiators lies in their method of heat transfer. Traditional radiators emit heat through the hot water passing inside them, whereas convector radiators heat the air that rises from the radiator. This process operates in a continuous cycle, where cooled air is drawn back into the radiator, reheated, and recirculated into the environment.

2. What Are Type 21 and Type 22 Radiators?

Both Type 21 and Type 22 radiators belong to the double convector panel radiator family known for their efficient heating capabilities and a sleek modern appearance. The number of the fins in the radiators sets them apart. 

• Type 21 Radiator: A single set of fins between the two panels. 
• Type 22 Radiator: Two sets of fins giving a sleeker appearance. 

The extra convector inside the Type 22 radiators gives it a distinct advantage that we will discuss below.

3. Heat Output:

Heating efficiency or heating output makes these both different. Type 22 radiators have two convector fins. This allows them to emit more heat compared to the Type 21 radiator with one convector fin. That’s why Type 22 radiators are considered to be an ideal for larger rooms or spaces that require higher heat levels.

4. Size and Depth:

Both radiator and heated towel rails are almost the same size. But Type 21 has a slimmer profile making it a better choice for small bathroom or narrow spaces. Therefore, if space saving is your concern, you may consider type 21. In comparison, type 22 radiators are slightly thicker in volume. It’s due to an additional convector fin that increases their heat efficiency. 

5. Key Differences Table:

6. Weight:

When it comes to the weight, the additional convector fin makes Type 22 radiators heavier than Type 21 models. The heavier weight might be a small concern for the installation. The wall mounted Type 22 may require a studier wall support for the installation. 

7. Cost:

Because of their simpler design and manufacturing with a single fin, Type 21 radiators tend to cost less than Type 22 radiators. However, the higher heat output and efficiency of Type 22 radiators can offset the initial cost difference in the long run. It especially true for the large bathroom where greater heating power is needed.

8. Suitability:

• Type 21 Radiators: Perfect for smaller spaces, such as bathrooms, studies, or guest bedrooms or bathrooms, where moderate heating is sufficient.
• Type 22 Radiators: Best suited for larger spaces, including living rooms and open-plan areas, where higher heat output is necessary to maintain comfort.

9. A Snapshot of Advantages of Each Radiator Type

Here, we have discussed various advantages associated with each type of radiator.  

9.1 Type 21 Radiators:

• Slim and compact design.
• Lower cost, making them budget-friendly.
• Ideal for small rooms or less frequently used spaces.

9.2 Type 22 Radiators:

• Higher heat output ensures better room coverage.
• Greater efficiency for larger areas.
• Cost-effective in the long term for homes with high heating demands.

10. Choice Between Type 21 and Type 22 Radiators

Room Size and Heating Requirements: Larger bathrooms require radiators with higher heat output. Therefore, the Type 22 may be a better choice. Type 21 can be suitable for narrow spaces due to its slim profile. 

• Wall Space: Prefer Type 21 radiators are ideal for cloakrooms and small bathrooms. 
• Budget: While Type 21 radiator may cost less, you should consider the upfront cost versus the long-term heating efficiency.
• Aesthetic Preferences: Both types are available in various designs and finishes to match your bedroom and bathroom decor. So, creating aesthetics according to your requirements is not an issue.
  
• BTU Rating: Always check the BTU capacity of the radiator. The British Thermal Unit (BTU) rating indicates the amount of heat a radiator and heated towel rail can produce. It's crucial to choose a radiator with a BTU rating that aligns with the heating requirements of your bathroom size. 
  
• Installation Constraints: Heavier radiators like Type 22 may require sturdier wall mounts. Therefore, you should ensure the wall can accommodate the slightly heavier radiator especially if you are ordering the wall mounted radiator. 

Final Thoughts:

Both Type 21 and Type 22 radiators are an excellent choice, depending on your specific requirements and needs. In case you are looking for a heating solution to heat up the small space then the Type 21 radiator might be enough in terms of heat output. However, for higher and superior performance in larger bathrooms, Type 22 might offer a better solution. To make the right choice, you must carefully assess your heating requirements, bathroom size and dimensions, and budget.