Commercial heating and hot water knowledge articles
Here you can explore our articles about some of the key topics in commercial heating, hot water, legislation and energy efficiency.
You can use the filter below to find out more about a specific topic.
Changing boilers from atmospheric to condensing
Refurbishing a commercial heating system can bring many challenges. In this article, we're looking at older heating systems and what needs to be considered when preparing them for a change from atmospheric boilers to condensing boilers.
Boiler heat exchanger for commercial heating
A wide variety of metal alloys are used in commercial boiler heat exchangers. Not every metal is suited for every application, that’s why we’re taking a look at the benefits of each material and for which kind of projects they are a popular choice.
Comparing direct and indirect fired water heaters
What is the difference between direct and indirect fired hot water systems? What does it depend on whether I should choose one over the other? We shed light on this topic in this article.
Cast iron boilers
Cast iron is a material that has been used for a long time in commercial boilers. Learn how it has developed over time and why it is still a material of choice in the heat exchanger of our boilers.
Commissioning commercial boilers
Commissioning is an essential procedure to ensure your commercial boilers and/or water heaters have been correctly installed and setup. What does it involve and what other benefits does it offer?
Changing heating system design with wide temperature differentials
Wider temperature differentials are increasingly used to design commercial heating systems. We investigate how this affects heating system performance and what you need to understand when designing these systems.
What are district heating networks
One of the Government's carbon-saving initiatives is the use of heat networks. What do they consist of and what benefits do they have?
Life cycle costs of a heating system
When purchasing new equipment, there is always the question concerning upfront costs and running costs. In this article, we compare both of them and explain the advantages of looking at the long-term costs of heating equipment.
Low loss headers explained
Why should you use a low loss header in your heating system? We explain how it works and what benefits it can have for your heating system.
Modular boilers for heat networks
Modular boilers are a compact and flexible solution. In heat networks, they can provide an excellent back up and top up solution to support other equipment such as CHP. Learn more about why modular boilers are being used in district heating schemes.
Modular boilers load matching in heat networks
How do you design a heat network to efficiently match peak and low heat loads? Find out how to create a high boiler turndown ratio for your modular boiler system
Open vented heating systems compared with sealed systems
Open vented boiler systems have been traditionally used. In modern times, sealed heating systems are the favourite choice. We look at differences between both and how to deal with them when refurbishing your heating system.
ErP-compliant cast iron boiler
Think the Energy-related Products Directive saw the end of cast iron boilers? Our cast iron boilers changed this, they can not only condense but are also ErP compliant. Find out how we've achieved this.
Commercial boiler flue systems
How much do you know about different flue types? We have compiled this page for you to find out more about available flues and what they look like.
Minimising heating plant size
Plant room space in the city is limited and expensive. What if you could minimise the size of your heating plant? We look at how modular boilers can achieve this.
Energy Technology List
You can benefit from tax deductions if you decide to invest in energy saving heating equipment. The Energy Technology List tells you which products are eligible. Learn more about it and which products are eligible for Enhanced Capital Allowances.
Load matching in multiple boiler installations
The use of several small boilers compared to one big boiler can make your heating system a lot more efficient. How it works - learn more about the benefits of large turndown ratios and improved system efficiencies.
Over the last few years, the government has introduced legislation to achieve carbon savings targets. Do you know which legislation exists? Have a look at this page to learn about it and what's behind the acronyms.
Minimum Energy Efficiency Standards
Non-domestic private rented properties are required to meet a minimum threshold when it comes to energy efficiency. This is regulated in the Minimum Energy Efficiency Standards which were enforced in the Energy Act in 2011. We have put together some information on this for you.
Condition Improvement Fund
Looking to fund your school boiler refurbishment? The Condition Improvement Fund could be right for you. Learn more about how it works, who is eligible and what projects can be funded.
Sizing hot water systems for sports facilities
Sizing hot water systems is a science in itself. Getting it right means you have a sufficient hot water supply without the risk of paying more for hot water you don't need. Find out more in our article.
What is a calorifier?
Ever wondered what exactly a calorifier is? We explain how a calorifier works and what it's used for in heating and hot water systems.
Corrosion protection for water tanks water heaters
Protecting your water heater is essential to ensure a continous hot water supply without breakdown. What are the available means to protect water heaters from corrosion? We've compiled information for you in this article.
The Energy-related Products Directive was one of the major legislations which has almost eradicated atmospheric boilers from the market. Learn more about the directive and its requirements here.
ErP Directive for water heaters
The ErP Directive does not only affect boilers but also water heaters. The requirements are not limited to energy efficiency and noise levels. Read our article to find out more.
ErP Energy Labelling
Energy labels indicating energy efficiency were introduced in 2015 to be applied to consumer products. A part of our product range is also affected.
Driving condensing boiler efficiency
In 2015, we saw the introduction of the Energy-related Products Directive. What is the aim of this legislation and what impact does it have on the commercial heating and hot water market?
Cleaner Heat Cashback
The Government has introduced a commercial boiler scrappage scheme for London to cut carbon and NOx emissions in the capital to improve air quality and energy efficiency in non-domestic buildings. We take a look at the criteria for a replacement, how the application works and how you can become a Hamworthy-approved installer.
Efficient heating system design with built-in boiler controls
An often overlooked aspect of energy efficiency is correct monitoring of external factors which influence the temperature in a building, understanding the usage of premises and how to set up boiler controls correctly. We look how these can assist to set up an efficient heating system.
NOx emissions from commercial boilers
NOx emissions are the 'hot topic' of the industry. In this article, we investigate why they are a reason for concern, how they are generated and what we can do to reduce them.
Medium Combustion Plant Directive in commercial heating
The Medium Combustion Plant Directive came into force in 2018 and regulates sulphur oxide and nitrogen oxide emissisions as well as dust into the air from combustion plants. In this article, we look at the MCPD specifically in reference to commercial boiler plants.
Hydraulic separation in heating systems
When it comes to refurbishments, it is important to protect new equipment. This can be done by hydraulically separating the primary and secondary circuit. We look at different methods to achieve this.
Energy efficiency incentives, improvements and legislation
Are you looking into funding your energy efficient heating plant? There is not only legislation in place but also help available to assist you in achieving this. We take a look at legislation and available incentives.