Tag Archive for: ATSx

MD wall hung boiler & ATSH indirect water heater

DHW For Smaller Businesses

Refurbishing and modernising heating and domestic hot water DHW for smaller businesses should not be a chore, but commercial boilers can be large and complex to install, especially if available space is limited for new plant. Adveco has responded to this, extending its award-winning MD boiler range with a series of highly compact wall hung variants designed with the smaller plant room in mind.

Smaller business types, from office buildings to light commercial industry, retail and cafés will typically exhibit defined periods of continuous heating and hot water demand across the working day, often encompassing peak periods of demand when energy costs can also be higher. For this reason, to ensure demand is met and energy costs offset, commercial applications will typically look to incorporate thermal storage through indirect heating, using the boiler as the primary energy supply. This is advantageous in terms of maintaining consistent levels of heating or hot water throughout the day, as well as being able to rapidly respond to fresh demands for extra heating. The size of such a system can however prove prohibitive for smaller businesses. While the MD range offers a variety of models to address central heating needs,  Adveco’s MD 15B, 24B and 34B feature connections specified for use with an indirect water heater that can also be used to provide DHW for smaller businesses.

The MD boiler’s single, high-quality patented titanium-stabilised stainless steel heat exchanger, provides exceptional construction strength and corrosion resistance. The brand-exclusive three-pass design features large bore, circular tube cross-sections that reduce the collection of debris for improved operational efficiency and extended operational life. This is further improved by separating the water flowing through the boiler from the business’ DHW supply which is achieved by pairing with an indirect hot water calorifier, such as the extremely compact 160 and 200 litre ATSH Stainless Steel High-Capacity Cylinders. The calorifier vessel includes a single internal high-capacity fixed heating coil at low-level for use with the high-powered MD heat source and adds the option of a secondary electric immersion for built-in system redundancy.

One of the greatest advantages of using this type of indirect tank with an MD Wall Hung Boiler is the consistency of DHW for smaller businesses without requiring the boiler to be in constant use. You, therefore, save on energy, further reducing emissions and are better able to control operational costs. The boiler efficiently heats the water in the tank, which is kept at a consistent temperature for a near-instantaneous supply of hot water as and when needed, steadily distributed throughout the day. Rapid thermal recovery means the system is able to support even the most demanding peak periods which are easily addressed by the built-in controls accessed from the MD’s LCD control screen.

Should business demands increase consistently, the MD is designed with cascade control to enable up to eight units to work together seamlessly, and the ATSH range of calorifiers offers larger vessel sizes for extra DHW load.

Whether providing space heating or DHW for smaller businesses seeking an efficient, cost-effective replacement for ageing gas-fired boilers to support your application, the Adveco range of MD wall hung boilers offer a wide choice of appliances to meet your particular business needs without the need to oversize a system which will be more costly to both install and operate over its lifetime.

Is A Calorifier The Right Choice For My Project?

Today we take a look at commercial-grade indirect-fired water heaters, and ask is a calorifier the right choice for your hot water or heating system?

A calorifier is a commercial-grade indirect-fired water heater that provides hot water in a heating and hot water system.

It is designed for projects requiring large volume storage of water at high temperatures, but rather than using a burner, the water is heated by heat exchanger coils containing liquid from another heat source, such as a boiler.

In a typical application, the hot water directly heated by a gas or electric boiler passes through the calorifier and is used, via heat exchange, to heat up the cold water in a separate system of pipework. This does mean that a calorifier cannot react as quickly to demand as a direct-fired water heater, however, with the calorifier working as a buffer and storing the hot water, it reduces the operational demand placed on the boiler. With the boiler no longer required to work as hard to meet the domestic hot water needs (DHW) of a building, energy is saved, costs are reduced and emissions fall.

With the increased efficiency of modern condensing gas boilers, having a dedicated hot water boiler to heat the calorifier is no longer a requirement as they can easily supply heat to both the calorifier and the heating system. The compact Adveco MD range of gas condensing boilers, for example,  are both high capacity and can be arranged in cascade to scale to provide both heating and, with an indirect calorifier, the DHW needs of a wide variety of commercial projects. It must be noted that when space heating is not required, such as during the summer months, the boiler will still be required to provide heat for the hot water system.

FUSION Hybrid Hot Water System File: ATSH cutaway. Another advantage of the indirect approach to heating is that due to the transferral of heat through the walls of the heat exchanger element the two fluids do not mix. This allows for more options in terms of the external heat supply and introduces a range of renewable technologies that use other fluids for heat transfer including solar thermal collectors and Air Source Heat Pumps. At Adveco, these options are supported by a variety of calorifiers. The Stainless Steel Indirect (SSI) range, for example, is supplied with a single high-output internal heat exchange coil at a low level to serve as an indirect calorifier in DHW installations. The ATSx range provides water heaters designed to be used with indirect heat sources as calorifiers across a range of DHW installations exhibiting smaller demands but requiring more than six bar pressure. For more complex and renewable-based systems, the Stainless Steel Twin-Coil (SST) or ATSR ranges offer a pair of independent internal heat exchange coils to serve DHW systems. Each high-output coil can be used with a separate heat source, enabling effective integration of renewable technologies or multiple heat sources, or alternatively can be combined to increase the heat transfer capacity from a single high-output source.

Also, by separating the supplies you reduce the risks of external contamination, a build-up of scale in hard water areas or the corrosive effects of soft water.

Calorifiers are also simple to install. Since there is no burner, there is no need for the gas supply to be directly connected to the appliance and the is no requirement for a flue.

So is a calorifier the right choice?

As with any hot water application, understanding the relationship between storage and recovery, and correct sizing is extremely important for efficient and cost-effective operation. Integrating a calorifier within a hot water system gives you a number of design options, as a larger calorifier means the boiler can be smaller, or the reverse if the existing system has a large efficient boiler. Understanding the hot water demand is critical. If demand is not so great, then using a larger calorifier can lead to unnecessary capital and ongoing operational expenditure. Go too small and the storage could prove inadequate and the system will not achieve its operational requirements.

Attaining the correct balance of demand and efficient, cost-effective supply is what ultimately defines a successful system, whether it be for a hotel, hospital, school, office or leisure facility. Each will have its own parameters to be met, and Adveco specialises in providing the widest range of calorifiers, boilers and renewables to meet the bespoke needs of any project.

The patterns of hot water usage and recognition of periods of peak demands often make sizing a complicated process, with many systems overcompensating and, by being oversized becoming more costly and less efficient. At its simplest, a commercial system should hold an hour of hot water output in storage, but the function of the building, its population and activities will adjust requirements, for example, where hospitals will typically exhibit a 24/7 demand for hot water, schools and offices may be limited to just 7½ hours per day. In some refurbishment scenarios, we will also see a physical limitation of space available for DHW storage, in which case a system will put more demand on the boiler or renewable to increase the output for preheating, reducing the required size of the calorifier.

If there is an availability of space, or a prefabricated packaged plant room approach can be used to relocate plant to previously unused space – such as a rooftop or car park – there is an opportunity to incorporate multiple calorifiers and thereby divide the total storage demand. This approach not only provides system resilience, but for commercial sites that exhibit predictable seasonal demands such as leisure centres, campsites and hotels, it allows for elements of the system to be shut down during off-peak periods. The other real advantage of adopting a packaged plant room approach to a DHW system is that the boiler or ASHP providing the preheat can be located in close association with the calorifier. The physical proximity helps negate problems of heat loss between the boiler, pipework and calorifier which can be detrimental if more widely separated in a system.

Is a calorifier the right choice for your project? If it is, the technical details of our products can be found here buffers and calorifiers and find out how we can help size your DHW application.

Adveco ATSx Stainless Steel Hot Water Tanks for Soft Water Areas

  • A complete range of indirect hot water calorifiers and buffer vessels.
  • Corrosion-resistant stainless steel construction for soft water areas.
  • Designed for high pressure, lower demand projects.

Commercial hot water and heating specialist Adveco, announces the ATSx range of stainless steel hot water tanks. The new product range encompasses five classes of vessel up to 1,000 litre capacity at 10 bar as standard to serve as buffer vessels and indirect hot water calorifiers. The range is designed to provide a more economic choice for high pressure, lower capacity commercial applications in soft water areas.

With single coil, twin coil and plate heat exchanger options for maximising transfer of energy, the ATSx stainless steel hot water tanks offer consultants, specifiers and contractors a broader set of options for the storage and delivery of domestic hot water (DHW) in soft water areas for their projects.

ATSI – Single coil indirect water heater.

ATST – Twin coil indirect water heater.

ATSH – Single double-helical high-capacity coil indirect water heater.

ATSR – Twin coil indirect water heater for lower-temperature renewable applications.

ATSB – Storage/buffer tank without coil.

Speaking of the launch of the ATSx range, Adveco’s Technical Director Bill Sinclair said:

“If your project has smaller hot water demands, but with pressure requirements greater than six bar, such as in taller buildings with a basement plant room, then the ATSx vessels are by far the most efficient and cost-effective choice for your project,”

Constructed from corrosion-resistant AISI 316Ti and 316L stainless steel, all ATSx tanks are designed, manufactured, and tested to the requirements of the Pressure Equipment Directive (97/23/EC), EN 12897.

The ATSx range is also supported by a choice of options and ancillaries from Adveco including control and overheat thermostats, destratification pump kits and unvented kits.

For projects with larger demands or requiring greater customisation in soft water areas, Adveco offers its SSB, SSI and SST ranges of bespoke stainless steel calorifiers and buffer vessels.

Discover more about Adveco’s ATSx range


Adveco commercial hot water and heating. For more information about Adveco’s ATSx stainless steel hot water tanks, call us on 01252 551 540 to discuss requirements, sizing etc.