Hot Water Cylinder News

McDonald Deliver Innovative CUBEflow Thermal Store With Integrated Heat Interface Unit

McDonald Engineers has designed and delivered an innovative thermal store packaged solution which enables them to offer a new approach to hot water solutions for tower blocks and flats.

The solution was developed for a refurbishment project of a block of 70 flats in the North East of England, which required a more energy efficient solution under the government’s Renewable Heat Incentive programme.

New CUBEflow Brochure Launched

McDonald Engineers has established itself as the UK’s market leader for the manufacture of rectangular copper tanks and has now updated its brochure to reflect its latest range.

The CUBEflow range is available as either a traditional Combination tank, providing gravity hot water, or as a Thermal Store unit, delivering mains pressure hot water.

The range has a selection of models that can be heated electrically, or indirectly by a gas or oil boiler, multifuel stove or log burner, solar thermal, heat pump, or a combination of sources.

THERMflow Thermal Stores for Eco Homes in Sheffield

McDonald Engineers has supplied 12 of its THERMflow Thermal Stores for a small development of 3 storey luxury eco-homes in Sheffield.

The 300 litre cylinders were custom designed for the project to accommodate solar thermal energy, solid fuel from a wood burning stove and a gas boiler as back up.

McDonald Engineers also specified a rapid recovery coil which was uprated in size to work in conjunction with the gas boiler to optimise the heat recovery time.

Horizontal Calorifier for Aberdeen Office Development

McDonald Engineers reputation for quality and service was instrumental in securing the contract for an 1800 litre horizontal calorifier for a major office refurbishment project in Aberdeen.

With space a key concern in the building, the architect had specified an 1800 litre horizontal calorifier to supply hot water to the offices and retail area below.

The cased cylinder was manufactured in copper and featured a high efficiency coil and manhole access facility.

McDonald Engineers Launch New THERMflow Brochure

McDonald Engineers have launched a new brochure to support the changing market demands of market leading thermal store, THERMflow.

Thermal stores are becoming an increasingly popular solution for hot water cylinders, not only because of its ability to deliver mains pressure hot water with limited maintenance implications, but also its ability to handle multi-fuel and renewable energy installations.

McDonald Engineers Calorifiers for Andy Murray's Luxury Hotel

McDonald Engineers have added yet another major celebrity to its list of prestigious clients, having worked in conjunction with a mechanical engineer to design the optimum hot water system for Andy Murray’s luxury Cromlix House Hotel development in Scotland.

The company supplied four of its 700 Litre POWERflow Commercial Hot Water Cylinders which were designed to suit the space available and deliver a highly efficient solution which could deliver all of the hot water requirements for guests.

Thermflow Thermal Store

Thermal Stores for Scotland’s Most Desirable Affordable Housing Project

McDonald Engineers has manufactured and supplied thermal stores for a development of affordable homes in an exceptionally rural area with spectacular views overlooking the Western Isles of Scotland.

The stunning homes featured McDonald Engineers’ THERMflow thermal stores with 180 litre capacity and designed to accommodate solar thermal energy and wood burning stoves.

Each home was designed to an individual brief using a blend of timber frames, hemp-lime construction, and a sustainable interpretation of Scottish traditional building.

Feed and Expansion Tank Brochure

Does Your Thermal Store Require a Feed and Expansion Tank?

Primary Feed and Expansion Tanks are generally used in open vented central heating systems, where a small water tank is located in the loft for the purpose of feeding and topping up the primary system and providing a receptacle should the primary water expand.

With normal gas and oil boilers there is little or no likelihood of this water being near boiling temperature.  However when Solid Fuel/Woodburning Stoves are used, there is a possibility that water close to, or at boiling point, may expand into the tank and this requires the tank to be made from a high temperature material.

Customer Delight at Rectangular Thermal Store

McDonald Engineers has demonstrated their ability to deliver the perfect hot water tank by designing, manufacturing and supplying this 250 litre CUBEflow Thermal Store designed to work with a solid fuel boiler and solar thermal panels.


The key requirement of the hot water cylinder was to capitalise on the available space in an existing airing cupboard whilst delivering the required capacity and accommodating two additional fuel sources.