McDonald Engineers Launch its ECOflow Heat Pump Cylinder
Filed under: Multifuel Hot Water System, heat pump cylinder, hot water cylinder

ECOflow Heat Pump Cylinders
McDonald Engineers has become the first UK manufacturer to launch an off the shelf hot water cylinder, specifically designed to work with heat pump technology.
The launch of its ECOflow unvented cylinder for heat pumps comes as a result of the growing demand it’s receiving from heat pump installers across the UK and beyond, who are looking for a tried and tested solution which is available as an off-the-shelf product, which comes with all the connections required for heat pump installations as standard.
Based on its market leading POWERflow 2000 unvented copper cylinder, ECOflow also comes pre-fitted with McDonald Engineers’ high performance heat pump copper coil and is insulated with a white cased finish delivering a GWP rating of <1. An optional integrated buffer vessel, which sits below the cylinder offers the advantage of a small footprint which suits many architects and specifiers who have limited space to work with.
McDonald Engineers’ Sales Director, Jamie Stewart, explained, “We have been making bespoke heat pumps cylinders for many years, however as the renewable energy market has grown, more clients have been asking for a standardised solution which offers the cost savings associated with larger production runs.”
He continued, “Copper hot water cylinders are widely recognised as the best and most cost effective solution to be used in conjunction with heat pumps. A leading heat pump manufacturer reckoned using an ECOflow type cylinder could save up to £180 per year on running costs. This is a hugely significant factor in ensuring the customer is given the best and cheapest to run unit.
The copper hot water cylinder market has already been given a major boost by Heat Pump manufacturers. Many recommending their products be used in conjunction with copper hot water cylinders due to the superior heat transfer properties offered by the material, as well as its bacteria killing properties and its recyclability.
The company has already received a positive response from existing clients and hopes to develop its position in the growing renewable energy market even further.
McDonald Engineers has been manufacturing hot water cylinders and supplying the UK and further afield from its base in Scotland since 1945. They have been at the forefront of hot water cylinder development for renewable energy applications for the last 4 decades.
For more information on McDonald Engineers and its full range of hot water cylinders visit www.mcdonald-engineers.com
Dual Coil Calorifiers Installed for Department for Communities and Local Government
Filed under: Calorifier, Copper Cylinder, Electric Wet Central Heating System, Multifuel Hot Water System, Unvented Cylinder, Vented Mains Pressure System, heat pump cylinder
McDonald Engineers’ expertise in delivering energy efficient hot water systems for commercial environments, was put to the test by the Department for Communities and Local Government at their headquarters in central London.

Four Calorifiers at Eland House
With a total focus on energy efficiency by the design team at Eland House, formerly the Office of the Deputy Prime Minister, McDonald Engineers manufactured and supplied four dual coil POWERflow commercial calorifiers for the refurbishment project.
The 1320 litre calorifiers were designed to work with two fuel sources. A Heat Pump was being used as the primary heat source and the units were therefore fitted with a high efficiency copper heat exchanger, to maximise the heat transfer from the heat pump’s lower flow temperature. A back up heat exchanger, for a normal boiler was added, to supplement the energy when required.
In line with the latest recommendations from many heat pump manufacturers, both the cylinders and the coils were manufactured from copper. This provides significant benefits in terms of maximum heat transfer, as well as boasting superior bacteria killing properties.
McDonald Engineers’ Sales Director, Jamie Stewart, explained “As more projects aim to maximise the energy efficiency of the hot water system, we are seeing a rise in enquiries from companies installing heat pumps who recognise that copper can deliver superior results.”
He continued, ” Copper is fast becoming the material of choice for hot water systems using multiple fuel sources such as heat pumps. Copper’s thermal conductivity is almost 30 times greater than that of Stainless Steel. This means it can heat water to higher temperatures in a far shorter period of time.”
With access to the boiler room extremely limited by doorway space, but a specified amount of storage required, McDonald Engineers were provided with the maximum dimensions that would fit. The company ensured every millimetre was utilised, by manufacturing the cylinders to extremely tight tolerances. The Calorifiers were then lagged on site.
Jamie added, “The client was delighted with the end result and our ability to maximise the size, commenting that if there had been a coat of paint on the cylinder, it would not have gone through the door.”
For details on McDonald Engineers’ heat pump cylinders click here or contact us for more information
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









