Future Proof Your Hot Water System With an Unvented Cylinder
Filed under: Renewable Energy Cylinders, Unvented Cylinder, hot water cylinder

Many architects, installers and end clients are turning to unvented cylinders as a means of future proofing their project, due to the systems’ ability to work with renewable energy sources such as solar and heat pump installations.
An unvented cylinder can be either heated directly by electricity or indirectly from an auxiliary boiler, typically gas or oil fired, and can be linked to a solar thermal or heat pump installation. When installed with a new generation condensing boiler, as required under the current Building Regulations, and connected to a renewable energy source, CO2 emissions and energy consumption are reduced.
With the growing unpredictability of energy prices together with the growing movement towards a renewable energy culture, many are seeing unvented systems as a means of keeping their options open with regards to powering their hot water system.
McDonald Engineers, Sales Directors, Jamie Stewart, explained ” Both solar thermal and heat pump systems require hot water storage, such as an unvented cylinder and the perfect partner for these renewable technologies is a copper unvented cylinder with specifically developed solar or heat pump coils. Copper gives unrivalled heat transfer and maximises the benefits of solar and heat pumps”
McDonald Engineers’ POWERflow 2000 range is one of the UK’s leading unvented copper cylinder systems and the company’s experience and expertise in producing one-off systems, to meet the exact requirements of a multi-fuel solution, is highly respected in the heating sector.
Jamie continued, “We have been at the forefront of the industry when it comes to designing hot water cylinders that are compatible with solar energy and heat pump solutions. However it’s our unique ability to manufacture for large contracts and for one-offs, to our uncompromising quality standards and unrivalled lead times, that has enabled us to establish our enviable reputation in the UK market place.”
To find out more about McDonald Engineers extensive range of “Renewable Ready’ solutions visit www.mcdonald-engineers.com or call 01592 611123.
Mitsubishi Ecodan Insist on Copper Hot Water Cylinders for their Heat Pumps
Filed under: Calorifier, Copper Cylinder, Electric Wet Central Heating System, heat pump cylinder, hot water cylinder
Mitsubishi, one of the UK’s leading manufacturers of heat pumps, has reinforced copper’s superior performance in renewable energy systems, by insisting that only copper hot water cylinders, such as McDonald Engineers POWERflow 2000 unvented cylinders, are used in conjunction with their new advanced Ecodan heat pump systems.
The news adds further weight to McDonald Engineers’ campaign to promote copper’s green credential when it comes to heat transfer and recyclability - as well as its bacteria killing properties.
McDonald Engineers’ copper cylinders are used widely with Mitsubishi’s Ecodan products and also a wide range of other Geothermal and Air Source Heat Pumps, due to the company’s unrivalled reputation in the Renewable. With over 65 years experience in developing its product range to maximise the heat transfer process, McDonald Engineers has the skills, knowledge and expertise, to develop bespoke solutions to suit renewable energy applications.
McDonald Engineers’ now offer solar and heat pump compatibility with its POWERflow 2000 Unvented Cylinder, THERMflow Thermal Store, ELECTRAflow Electric Wet System, SOLARsave Pre-Plumbed Solar System and TIMEsaver Plumbing Unit, as well as its full range of Calorifiers.
However with the company’s unique ability to manufacture bespoke hot water cylinders to a client’s exact requirements, McDonald Engineers is fast becoming the copper cylinder manufacturer of choice when it comes to heat pumps and renewable energy solutions.
For details on McDonald Engineers’ heat pump cylinders click here or contact us for more information
How to Achieve Constant Hot Water from Your Calorifier- No Matter How High the Demand
Many people err on the side of caution when designing hot water systems for commercial environments, such as hotels, hospitals and offices. However thanks to McDonald Engineers combination of its calorifier and plate heat exchanger systems, you can achieve the right level of hot water when you need it most.
At a time when every client is looking to achieve a cost effective and energy efficient system, whilst ensuring that it is never caught out, many specifiers tend to play it safe, when it comes to determining the size of storage cylinder for the hot water system.
The problem with over specifying the hot water buffer capacity for a commercial environment, is that you will continuously require additional energy to heat water that is rarely used. However the flip side of the coin, is that an under specification can lead to running out of hot water which can seriously damage customer satisfaction levels.
McDonald’s PLATEflow system compromises a Plate Heat Exchanger, which is pre-piped and mounted on to a calorifier, to supply continuous hot water, with the re-assurance that the buffer capacity is available during peak periods.
The system also ensures that any excess hot water generated by the Plate Heat Exchanger is never wasted and instead is diverted to recharge the buffer vessel.
The solution effectively decreases the amount of stored hot water required, whilst preventing the system from ever running out.
McDonald Engineers’ Sales Director, Jamie Stewart explained “As well as delivering the most energy efficient solution, the fact that we can supply the system pre-assembled to your specification can significantly reduce installation and commissioning time, which is critical in commercial environments.”
To find out how you could save energy on your next project call 01592 611123 or view our calorifiers and plateFLOW pages now
McDonald Engineers Introduce the Renewable Ready Range of Hot Water Systems
Filed under: Copper Cylinder, Electric Wet Central Heating System, Multifuel Hot Water System, Vented Mains Pressure System, hot water cylinder

McDonald Engineers is enabling architects and consultants to reach their energy targets with the launch of their dedicated range of hot water systems that are designed to be used in conjunction with renewable energy sources such as solar energy and heat pump technology.
The Renewable Range features its POWERflow2000 system, the THERMflow range, the ELECTRAflow electric wet central heating system, the TIMEsaver plumbing unit, its full range of Calorifiers and of course its original Solar Save system which was the first in the range to be designed with high specification coils and probe pockets to maximise the benefit of solar energy.
The company, which has been at the forefront of hot water systems since 1945, has been developing cylinders designed for solar energy since the early 70s and has established itself as one of the most respected manufacturers in the industry.
Managing Director, Bill Stewart, said, “It is vital that we all play our part in reducing the energy we are using and we are delighted to launch this exciting range of products that we hope will enable designers, specifiers and contractors to achieve their energy saving obligations.”
A key element in the design of the range is the recognition that, in many instances, solar energy is unable to act as the single source and provide the level of power required to heat every application.
McDonald Engineers have therefore developed a multi-fuel system, such as in their THERMflow range, which can work with a number of energy sources and in doing so, reduce the ongoing running costs.
Bill continued, “By designing a system that can work with a multiple of fuels we can attempt to draw the energy from every available source thereby delivering the most cost effective hot water solution.”
The company is also available to incorporate a number of high efficiency coils into its POWERflow 2000 range to improve the effectiveness of solar, heat pumps and boilers in delivering the required levels of energy.
For more information on the range of renewable energy hot water systems and the full range of hot water systems available from McDonald Engineers visit www.mcdonald-engineers.com or call 01592 611123
THERMflow Hailed As UK’s Most Flexible Hot Water Cylinder
Filed under: Copper Cylinder, Multifuel Hot Water System, Vented Mains Pressure System, hot water cylinder
McDonald Engineers’ THERMflow vented mains pressure system has been hailed as the UK’s most flexible hot water cylinder on the market today due to its unrivalled ability to integrate with multi fuel installations including electric, gas, oil, solar and solid fuels.
The rising cost of gas and electricity together with the global movement towards more sustainable energy sources is seeing a growing demand for flexible hot water systems, such as THERMflow, that can enable the core energy sources to be supplemented with more sustainable fuels, such as solar and wind, as well as solid fuel sources.
Manufactured using McDonald Engineers advanced copper manufacturing system, the THERMflow system delivers all the bacteria killing properties and reduced running costs associated with copper and is available in a wide range of sizes.
And demonstrating McDonald Engineers’ position as one of the UK’s leading manufacturers of copper cylinders, the THERMflow product can be custom designed to almost any height, a wide range of diameters and with any number or bespoke positioning of connections to facilitate those unusual or awkward areas.
McDonald Engineers’ Managing Director, Bill Stewart, explained “We are receiving a growing number of enquiries from architects, consultants and end-clients across the UK who are now looking at integrating alternative fuel sources to supplement gas and electric which is offered as standard on our THERMflow system.”
He continued, “However the THERMflow system continues to be one of the UK’s most popular vented mains pressure system with its integrated primary feed and expansion tank, zero maintenance requirement and superior energy efficiencies.”
For more information on the THERMflow hot water system and the full range of hot water cylinders and systems available from McDonald Engineers visit http://www.mcdonald-engineers.com/ or call 01592 611123.
ELECTRAflow Wet Electric Heating System is Perfect Choice in Refurb Market
Filed under: Copper Cylinder, Electric Wet Central Heating System, hot water cylinder

ELECTRAflow wet central heating system
ELECTRAflow’s 100% heating efficiency combined with its low installation costs has made it the perfect choice for housing associations and contractors looking at developing or refurbishing new houses, flatted developments and properties in rural areas with no natural gas supply.
Manufactured by leading copper cylinder specialist, McDonald Engineers, The ELECTRAflow system’s integrated electric boiler and copper storage cylinder is both cheaper to install than a heat pump, requires no annual boiler maintenance and is more efficient than other forms of heating such as night storage, oil and LPG providing significant cost savings throughout its lifetime.
The compact system also requires no flue making it easy to situate and ideal for listed buildings and high rise flats.
Available in vented and unvented systems, ELECTRAflow can also be integrated with additional fuel types including solar panels, solid fuels and can used to power underfloor heating as well as standard radiators.
McDonald Engineers, Managing Director, Bill Stewart, commented, “The days of electric heating solutions being prohibitively expensive to run are over with the robust, intelligent and highly cost effective solution offered by ELECTRAflow particularly when combined with solar energy and economy tariffs from the utility companies.”
For more information on the ELECTRAflow system and the full range of hot water systems available from McDonald Engineers visit www.mcdonald-engineers.com or call 01592 611123.















