At Turnbull & Scott, we are committed to maintaining the highest standards of quality and safety in all our engineering and manufacturing processes. Typically, we operate under the British Standard BS EN 13445 and the Pressure Equipment and Safety Regulations (PESR) for UK supply and Pressurised Equipment Directive (PED) for EU/EEA territories, UKCA / CE marking products where appropriate.  Atypically, however, we also consider a wide range of worldwide standards.

BS EN 13445: Unfired Pressure Vessels
This European Standard provides a comprehensive guideline that ensures the integrity and safety of unfired pressure vessels. BS EN 13445 is specific to the design, fabrication, and inspection requirements necessary to manage the risks associated with high-pressure products. By following this standard, we ensure our products are robust, reliable, and fit for purpose, meeting all necessary European regulations.

BS EN 12952: Water-tube boilers and auxiliary installations

This standard encompasses design of boilers in general, but also fired process heaters such as economisers and is used where the exchangers may be exposed to close coupled heat sources.

PD 5500: Specification for unfired pressure vessels

PD 5500 is a Published Document (PD) that specifies essential safety requirements for the design and fabrication of pressure equipment and assemblies in the UK.  It specifies requirements for the design, manufacture, inspection and testing of unfired pressure vessels made from a variety of steels. It also includes information for the requirements of vessels made from aluminium, copper, nickel, and titanium. PD5500 is also regarded well worldwide, particularly in Commonwealth territories, and a number of other countries.

Turnbull & Scott also has experience designing exchangers with ASME and the French nuclear sector RCC-M codes and are happy to look at enquires outside of the above.

By adhering to these standards, Turnbull & Scott not only aligns with rigorous European safety regulations but also commits to delivering high-quality, safe, and reliable products to our customers globally.

We get it from you, the customer! We have a Heating Requirements Form (aka Heat Loss Form) that we can send you to complete in your own time and return to us. Once we have this info, we can enter the information into the Heat Loss Calculator.

This stands for Low Pressure Hot Water. LPHW is produced by a Low Temperature Hot-Water Heating System (LTHW system) such as the boiler system you have in your house. LTHW systems are largely used for space heating in our homes, residential buildings, offices etc.

The nominal bore refers to the hollow section of a pipe. It is an approximate measurement across the inside diameter of the pipe i.e. across the ‘hole’ or bore. When we measure pipe, we always work on the inside size of the pipe.

Regardless of the type, heaters are designed and rated to deliver a particular amount or ‘output’ of heat, this is measured and expressed in kW, which stands for kilowatt. A 1.5kW heater would be expected to deliver 1.5kW of heat output into a space. A heater with a higher kW value will be able to deliver a greater amount of heat.

The bar is a widely used metric unit of measurement for pressure and 1 bar equals precisely 100,000 pascals. In a space heating context, water and steam need an amount of pressure applied to move them through pipework. So, you may see a description for a low temperature water heating system supply noted as ‘2 bar’ for example, which is a relatively low pressure.

Convection is one of the three natural methods of heat transfer. This relates to heat transfer in gases and liquids, the others being radiation and conduction.

Convection is the circular motion that happens when warmer air (or liquid)— which has faster moving molecules, making it less dense — rises, while the cooler air (or liquid) drops down.

We offer two types of Over-Door Heater, the wall or ceiling mounted Electric Over Door Heater (ODH) and Electric Recessed Over Door Heater (RDH). Each type has several models that differ in heat output.

Check out our range of models here.

Turnbull & Scott offer six heaters in this category which are:

1. Electric Architectural Wall Heater – CHDA
2. Electric Wall Heater – CQAC
3. Electric High-Level Heater – HLH
4. Electric Recessed Ceiling Heater – RCH
5. Electric Recessed Wall Heater – CWD
6. Electric Plinth Heater – CCB

View our range here.

Turnbull & Scott offer various types of trench heating product. Some of these main product types use piped water (low pressure hot water) as the heat source and others use electricity.

Find these types here.

At Turnbull & Scott, we offer three Infrared Heaters:

• UFO-S29
• UFO-S23
• UFO-T23

Look at our range here.

IP (Ingress Protection) ratings are used to measure the levels of sealing effectiveness of a mechanical or electrical item. These ratings then give customers an idea of the item’s resistance to unwanted or foreign bodies such as dust and dirt.

As mentioned above, IP ratings measure unwanted intrusion. This can include:

• Resistance to ingress by the user
• Resistance to ingress from dust, dirt etc.
• Resistance to moisture ingress

Destratification solutions optimise heating by capturing the heat at the higher ceiling levels and forcing it downwards. This is important for reducing heat loss through the roof and reducing the cooling effect of air ventilation. The process typically lowers energy costs.