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Danfoss ABQM large cast iron flanged pressure independent control valve with copper pilot tubing
13 Feb

Danfoss AB-QM Valves Specified in Sydney’s Barangaroo Project

Barangaroo Project

Basements and Infrastructure – Danfoss AB-QM Specification

We are pleased to announce that the Danfoss AB-QM Pressure Independent Balancing & Control Valve has been specified in the Chilled Water System of the Barangaroo project in Sydney, NSW.

The Chilled Water Valves form part of the District Cooling Plant for Barangaroo servicing commercial buildings, residential buildings and the casino.

Total Number of Valves Specified: The total number of valves specified across all stages of the District Cooling Plant – Chilled Water System is 83

Valve Sizes: Sizes vary from DN65 to DN200 High Flow

Flow Rates: Flow rates vary from 4.40 l/s to 70 l/s

The Danfoss AB-QM is a pressure independent balancing and control valve is able to continuously optimise large HVAC systems towards greater efficiency delivering significant running cost savings. It has been a huge success in Europe, North America, the Middle East and in Asia, and has been the preferred valve to specify on several projects throughout Australia.

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Cross-section of electric underfloor heating mat installed under dark floor tiles with Devex TS-500 thermostat
13 Dec

Electric Floor Heating – What You Need to Know!

Question 1:

Does the heating cause structural damage such as cracking of the slab or tiles?

Answer:
No. A properly designed floor heating system does not overheat the concrete or tiled surface. The concrete is typically heated to a maximum temperature in the range of 25°C to 45°C, much less than the temperature a concrete footpath would experience on a hot sunny day.

Question 2:
Is it possible for the heating cable to become faulty or burn out?

Answer:
If the system is properly designed and installed, and it is controlled by a floor sensing thermostat, the cable will not be allowed to run hot enough to cause damage.

Question 3:
If the heating cable is damaged can it be repaired?

Answer:
Should a cable be damaged either during or after construction, the location can be detected using special testing equipment. Repairing a cable is normally straight forward and can usually be confined to a small area.

Question 4:
Do the systems require any maintenance?

Answer:
No. They are virtually ‘maintenance free’ because there are no moving parts to break down, with no grills or ducting to clean and maintain. Compared to alternative central heating systems such as ducted gas or Hydronic systems, Devex Systems’ floor heating systems are truly maintenance free.

Question 5:
I have a tiled floor over both a timber and a concrete floor structure. Which mat should I use?

Answer:
We would recommend that each section of floor has its own ‘mat’ and thermostat. In this case, each mat would have its own floor sensor preventing an uneven temperature between the two floor areas. X mat MG 150 would be recommended for the concrete and timber floors.

Question 6:
Can I put an X mat underneath bath / shower tray / kitchen units etc?

Answer:
We do not recommend heating installed under such fixtures for a number of reasons:
1. It can inhibit the flow of heat being produced from the system
2. If ever a fault was to occur, it can be very difficult to carry out a repair.

Question 7:
Can floor heating be installed into a thin adhesive bed?

Answer:
Yes, it is possible to install a X mat on top of most existing floor surfaces, including concrete, timber, fibre cement sheet and existing tiles using a thin adhesive bed or levelling compound.

Question 9:
How long does the heating system take to warm up?

Answer:
This depends on various factors, such as:

  • The type of system installed
  • The output of the system versus heat loss of the room
  •  The distance of the cable from the floor surface

This could be anything from 30 minutes for a X mat under tiles, to 5-7 hours or more for a storage system.

Question 10:
What is the difference between twin and single conductor cables and mats?

Answer:
The difference between the two is the ‘cold tail’. With the twin conductor, there is no second connection tail to return to the thermostat. With the single conductor there is a cold tail at each end of the cable or mat and they have to be brought back together at the connection point. The twin conductors have a very low Electromagnetic radiation (EMF). Both the single conductors and twin conductor cable and mats are well within recommended EMF standards.

Question 11:
Can suspended slabs be heated?

Answer:
Yes they can. However, the exposed underside of the slab must be insulated to minimise downward heat losses. Styrofoam and/or polystyrene insulation boards are often used.

Question 12:
What value of home insulation is recommended?

Answer:
We recommend that you provide for at least the minimum requirements as set out in the Building Code Australia. We also recommend the use of perimeter and under floor insulation to the slab itself, particularly in cold areas. The higher the levels of insulation, the lower the running costs.

Question 13:
Is supplementary heating required?

Answer:
If steady 24 hour a day warmth is required, the building is well insulated and the correct electricity tariff is used, then generally no supplementary heating is required. However, timber floors may require supplementary heating because the amount of heat permitted under a timber floor is limited.

For additional information, please contact our specialists at 1800 636 091 or email our team at info@devexsystems.com.au.

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Warehouse worker in hi-vis vest overseeing forklift moving green drums, showing industrial radiant heating application
21 Aug

The Radiant Efficiency Factor: Schwank Gas Radiant Overhead Tube Heaters

Radiant heat is similar to the warmth felt by the sun on a cool winter day. It’s the heat that warms people and objects, not the air. The ‘radiant efficiency’ or ‘radiant factor’of a gas radiant overhead heater is determined by the percentage of fuel energy transformed into radiant energy from the combustion process. More simply put, the radiant factor is the measure of the radiant component of the total heat output.

The higher the radiant factor, the more heat will be directed to the desired area.

A higher radiant factor can mean that:

  • Not as many heaters need to be installed, which results in savings of both capital and running costs
  • Heaters do not need to run for as long to be able to maintain a comfortable temperature

Additional running cost savings are also achieved when 2-Stage or preferably the Full Modulation control option is included.

Radiant energy is a function of 3 factors:

  • The surface temperature of the emitting body
  • The surface area of the emitting body
  • The ’emissivity’ factor of the emitting body

Radiant energy is emitted by any ‘body’ that is warmer than its surroundings.

An excellent example of a product with a high radiant factor is the Schwank Gas Radiant Overhead Tube Heater.

The calorSchwank is an example of an overhead gas radiant tube heating system with a very high radiant factor of up to 72.7%, followed by the infraSchwank – up to 60.2% and the novoSchwank – up to 52%.

For example, the calorSchwank’s extremely high radiant factor is attributed to its innovative burner technology, its high-quality ceramic reflector insulation as well as the combination of the most varied materials, increasing the radiant characteristic of the tubes and reflection properties of the reflector. This tube heater minimises the amount of convection heat thus increasing the radiant factor and improving the efficiency as heat that accumulates below the ceiling is considered a waste of energy.

Similarly, the infraSchwank also has a high radiant efficiency resulting from optimised environmentally friendly combustion from the ceramic burner tile and the state-of-the-art design of the tubes and reflectors.

Schwank gas radiant overhead tube heaters are designed and manufactured based on the science of radiant heat. Radiant factor certificates are available on a number of models and are backed by independent laboratory testing by DVGW laboratory according to DIN EN 416-2.

Reference: http://www.schwankusa.com/infrared-heaters/ir-efficiency/

Learn more about Schwank Tube Heaters

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25 Jun

Overcoming HVAC Inefficiencies

Common Concerns with Inefficient HVAC Systems and How the Danfoss AB-QM Valve can better Optimise your System Towards Greater Efficiency:

  • Commissioning is time consuming and often under huge time pressure
  • Systems are not optimised under partial loads leading to efficiency and control issues
  • Investment in new HVAC systems can be expensive
  • Existing HVAC systems are often inefficient and can be very expensive to replace

Commissioning is time consuming and often under huge time pressure

  • AB-QM allows for short commissioning and installation time
  • AB-QM involves very few manual adjustments and calculations required
  • AB-QM is 2 valves in one
  • AB-QM removes the need to adjust balancing valves at every terminal unit
  • AB-QM will automatically balance the installation immediately after it has been installed (just select the required flow)
  • AB-QM allows for a quicker, more straight forward commissioning and installation process designed to reduce installation headaches and significantly lowering associated installation costs

Systems are not optimised under partial loads leading to efficiency and control issues

  • AB-QM eliminates instability under partial load delivering required flow rate independent of system pressures and flows 100% authority
  • AB-QM reduces over-pumping and associated pumping costs
  • AB-QM ensures that design delta Ts are achieved optimising equipment efficiency
  • AB-QM ensures good control of room temperatures
  • AB-QM creates more efficient settings and fewer complaints
  • AB-QM automatically optimises HVAC systems towards greater efficiency reducing running costs

Investment in new HVAC systems can be expensive

  • AB-QM can reduce investment cost
    • 1 valve replaces 2 (a compact automatic balancing valve and pressure independent control valve in one)
    • Eliminates the need for expensive branch/partner valves
    • Significantly reduces commissioning and labour costs

Existing HVAC systems are often inefficient and can be very expensive to replace

  • AB-QM can significantly improve the performance of existing systems with very short payback (typically less than three years)
  • AB-QM solves balancing & control issues in existing (and new) HVAC systems
  • AB-QM will save on energy and based on a conservative upfront investment will be paid back in approx. 3 years
  • AB-QM maintains optimal temperatures for indoor environments, ensuring fewer temperature fluctuations throughout the day
  • AB-QM ensures lower running cost of existing systems with very short payback period
  • AB-QM improves indoor air quality with high return on investment i.e. running costs savings and a very short payback period

 

LEARN MORE!

For an obligation free quote, please call us on 1800 636 091 or email us at info@devexsystems.com.au

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InfraSchwank overhead tube heater installed in commercial aircraft hangar
19 Jun

Looking for high efficiency gas overhead heating in large commercial and industrial spaces?

Looking for high efficiency gas overhead heating for large commercial and industrial spaces?

These German-made Schwank High Efficiency Gas Radiant Overhead Tube Heaters have a fast pay-back and have proven their efficiency time and time again, reducing energy consumption by up to 50% when compared to traditional heating systems used to warm medium to large spaces. Running cost savings and radiant factor certificates are available upon request to verify the heater system efficiency.

Schwank is the world leader in gas radiant heating. After having invented infrared gas heating over 70 years ago, Schwank has become internationally recognised for their state-of-the-art, high performing overhead heating systems.

Application Examples:

Commercial and Industrial Indoor and outdoor environments

  • Industrial factories
  • Warehousing and Logistics buildings
  • Vehicle service garages and Wash Bays
  • Airplane Hangers
  • Welding and fabricating shops
  • Sports facilities
  • Show rooms

 Features/Benefits:

  • Exceptionally high economic efficiency
  • High quality, German-made
  • Uniform and comfortable heat distribution
  • Short warm-up times
  • Long-life cycle and high comfort
  • No dust swirls or draughty air

Models:

  • calorSchwank tube heater, Premium Model
  • infraSchwank tube heater, Industrial Standard
  • novoSchwank tube heater, Entry Model

Please visit the following link for more information on these heaters: https://devexsystems.web-winners.com/gas-radiant-overhead-heating.html

 

For more information or an obligation-free quote please call us on 1800 636 091 or info@devexsystems.com.au

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Comfortline radiant heating panels installed in heritage sandstone hall with exposed roof trusses
19 Jun

Looking for a modern and energy efficient heating solution for residential and commercial spaces?

Specialised Heating Solutions by Devex Systems

Looking for a modern and energy efficient heating solution for residential and commercial spaces?

Comfortline Electric Radiant Overhead Heating Panels offer precision comfort with low running costand are easy to install.

These panels are the perfect heating solution for both indoor and outdoor applications like cafes & restaurant patios, workshops, nursing homes, hostels and small warehouses. They are perfect for average to low ceiling heights and offer a sleek and modern heating solution for the cooler months.

These panels are offered with one, two or three elements depending on the degree of heat you require.

A Comfortline electric overhead heating panel costs about 60c/hour to run whereas where as a typical mushroom heater on bottled gas will cost five times that – up to $3/hour.  # Assumes CL24 with electricity at 25c/kWhr ^ Assumes $25 refill for 9kg LPG bottle

Comfortline panels emit up to 10% more usable heat than similar panels on the market thanks to their unique “silicating” surface treatment. They are packed with rock wool insulation to minimise upward heat loss.

The radiant surface is designed in sections of naturally anodised aluminium, set in a galvanised steel case for strength. The panels are white powder-coated giving them a sleek and attractive modern appeal. Other colours are available by special order.

For more information or an obligation-free quote please call us on 1800 636 091 or info@devexsystems.com.au

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Hydronic underfloor heating pipes laid in serpentine pattern across concrete floor during construction
19 Jun

Hydronic Floor Heating – Modern Comfort Heating with Low Running Costs

HYDRONIC FLOOR HEATING is a water based system that is generally used in large spaces and can be paired with a number of different energy sources including natural gas, electric heat pump or solar energy keeping running costs down. These systems offer total comfort heating with an even distribution of warmth across almost any floor covering surface.

For over 40 years FLOOR HEAT AUSTRALIA, our installation and after-sales service & support division of the business, has been supplying high quality, hydronic floor heating based on customised designs to suit your specific needs.  Having completed over 60,000 installations across Sydney alone, we are widely respected in the industry for installing technically advanced, economical and environmentally responsible heating systems that meet Australian standards.

LEARN MORE ABOUT ‘FREQUENTLY ASKED QUESTION’!

For an obligation free quote, please contact us on 1800 636 091 or email your plans to info@devexsystems.com.au

 

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Woman with arms raised in a golden field at sunset representing comfort and wellbeing
12 Jun

The Science of Radiant Heat

The vast majority of our products have been developed based on the science of RADIANT HEAT.

Radiant Heat warms people and objects, not the air, making it highly efficient and very economical because heat loss is significantly reduced.  The sun is a great example of a natural source of radiant heat even at low air temperatures.

Schwank utilises radiant heat to produce heating systems that consume less energy and save on energy costs. By increasing the radiant heat temperature, the air temperature can be lowered and therefore maintain
comfort.

Call our experts on 1800 636 091 or email us on info@devexsystems.com.au

 

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Hydronic boiler and manifold system installed in kitchen wall with underfloor heating pipes
10 Jun

Gas Boiler Hydronic Floor Heating Systems: The Basic Planning Parameters

Gas Boiler Hydronic Floor Heating Systems: The Basic Planning Parameters

There are a number of things to keep in mind when installing a hydronic floor heating system that uses a gas boiler: minimum heated floor area requirements, manifold and boiler locations and zoning layout.

Minimum Floor Heating Requirements

Hydronic floor heating systems that use gas boilers must have a minimum area of 60m2 – 90m2 running at any given time. The area is calculated based on the minimum boiler output. Gas boilers will have a “high” and a “low” gas flame setting and the boiler output will be based on the gas consumption at these two fixed gas settings.

Hydronic floor heating requires a network of pipes, manifolds and controls. It is best to have one zone per room.  This ensures lower running costs and more control over comfort levels, but it can also result in higher up front costs.

Important Note on Short-Cycling

Heating an area less than 60m2 can cause short-cycling which can lead to serious problems with the boiler. Gas boilers are designed to run for periods of time (5 min or more) and where their capacity significantly exceeds the heat load of the floor, the boiler will run on a rapid repeat ON/OFF cycle (called “short cycling”) which can cause significant damage to the boiler through running and maintenance issues.

Bathrooms/Ensuites

When heating individual small areas such as bathrooms and en-suites it is important to note that they are not able to be heated on a “stand-alone” basis. It must be part of a larger heated area in order to run efficiently and economically.  If you are looking to heat a bathroom or small living space that does not meet the above minimum area requirements (60m2 – 90m2), the best option, when taking into account capital, install and running costs is electric floor heating.

Boiler Location

Boilers are typically located inside or outside and mounted to the wall. If they are located inside, they must be flued externally out through the wall or roof. During the design phase for the location of the boiler, it is important to keep in mind that the maximum flue length is limited. Keeping the fluing distance down is a very important factor in keeping the overall costs down. In Australia boilers are typically located outside, but if a basement or plant room is accessible this would be the preferred location as they offer further shelter from the elements.

An average boiler is around 1m high x 500mm width x 350mm deep. The boiler must be connected to the manifold(s) with fixed Feed & Return pipes as it is  important to keep the distance between the boiler and the manifold to a minimum to avoid unnecessary cost. Please note that the Feed & Return pipe dimeters are generally a minimum of 51 or 58mm in diameter. Allowance MUST be made for this. Typically, they would run through wall cavities attached to the underside of ceilings, run through the floor slab before pouring the concrete, external to the building etc.

Manifold Locations

The manifold is best located in a fairly centralised and accessible location like the linen cupboards, kitchen islands, laundry cupboards, garages, or outside/inside next to boiler. Height and width restraints should always be considered before installation.  The floor heating water pipes connect directly to a manifold, so it is important that the manifold be located within close proximity to the heated area. Typically, the maximum area serviced by a single manifold is 240 m2. The manifold not only has to be at the highest point of the areas connected to it, but it must be located within close proximity to those zones.

For a more detailed look at manifold space requirements, please click here :

For more information, please contact us on 1800 636 091 or info@devexsystems.com.au

 

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Green dollar sign on green background representing cost-effective heating solutions
20 May

Affordable Comfort Heating from the Ground Up and from the Ceiling Down!

DEVEX SYSTEMS is a leading supplier of specialised heating solutions for new and existing buildings in residential, commercial and industrial environments. Our core business was originally founded upon radiant floor heating allowing us to offer affordable comfort heating from the ground up. We also offer affordable comfort heating from the ceiling down with our range of overhead radiant heating panels.

For over 40 years Floor Heat Australia, our installation and after-sales service & support division of the business, has been supplying high quality, European-made electric floor heating systems and hydronic floor heating based on customised designs to suit your specific needs.  Having completed over 60,000 installations across Sydney alone, we are widely respected in the industry for installing technically advanced, economical and environmentally responsible heating systems that meet Australian standards.

Electric Floor Heating is known to deliver total radiant comfort heating from the ground up while being hidden from view, these systems are designed to fit effortlessly into any environment without taking up valuable floor space. They are silent, safe and offer superior comfort.

Electric floor heating is a cost effective heating solution taking into account both upfront and running costs.We offer various systems that are compatible with almost any floor covering. Commonly used in bathrooms, kitchens and living spaces, our electric floor heating systems are low maintenance and come with a 10 year warranty on mats and cables. These systems can be complemented by our range of X thermostats – sleek, modern and easy-to-use complete with a best in class 5 year warranty!

Hydronic Floor Heating is a water based system that is generally used in large spaces and can be paired with a number of different energy sources including natural gas, electric heat pump or solar energy keeping running costs down. These systems offer total comfort heating with an even distribution of warmth across the floor space.

They use minimal energy consumption and can be installed under almost any floor covering surface. Our installers are accredited with Rehau and our pipes are backed by a 25 year warranty.

Please note that supply & install of electric and hydronic floor heating is available in Sydney only. Supply-only is available Australia wide.

Comfortline Overhead Electric Radiant Heating Panels are the perfect solution for hard-to-heat indoor and outdoor areas. They are ceiling mounted, which means they avoid using valuable floor space. These heating panels cost about 60 cents/hour to run#, whereas a typical mushroom heater or bottled gas system could cost five times as much – up to about $3/hour.^  Odourless, silent and non-polluting, the radiant heat offers up to 10% more usable energy than similar panels.

Comfortline heating panels are made of a unique “silicating” treatment on the heating surface which makes them emit more heat downwards. They have a sleek and modern appearance and are ideal for homes, schools, shops, garages, offices, outdoor patios etc. For industrial applications, please visit our website, 192.206.5.200/~development/devexsysytem to learn more about our Schwank gas radiant overhead tube heaters.
# Assumes CL24 with electricity at 25c/kWhr
^ Assumes $25 refill for 9kg LPG bottle

Learn more about our other specialised heating solutions including Schwank gas radiant overhead tube heaters designed for industrial applications.

Let us help you with affordable comfort heating solutions for your home or business environment. Please call us for an obligation free-quote on 1800 636 091 or email us at info@devexsystems.com.au

 

 

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