Equipped with our exclusive, energy efficient and easy to control EC Motor technology, Rosenberg’s ECFanGrid is our approach to improve reliability, flexibility, and simplicity in existing or new ventilation systems. As a Property Owner, Manager, Contractor, or a Specifier our modular concept provides a cost-effective HVAC solution.
Please choose your category below to find out more.
CONTRACTORS AND SERVICE PERSONNEL
Plug & Play
The ECFanGrid retrofit kit is a ‘plug and play’ AHU solution that reduces the installation time and labour on your retrofit project. Rosenberg’s ECFanGrid kit includes the fans, a grid layout, inlet cones and cone plates, mounting supports to create a structure, sheet metal fill plates and all of the assembly hardware. We offer a pre-assembled Control Cabinet complete with circuit breakers and an additional 24V power supply that saves time on-site.
No expensive building envelope renovation
An ECFanGrid consisting of several smaller fan units is designed to replace a large single fan.
Components are small enough to easily move through existing doorways.
No need to rent expensive equipment like a crane.
Reduce downtime during retrofits
On some projects, it is possible to install an ECFanGrid while the single original fan is still operating.
We provide the drawings and documentation
you need to ensure that the installation and commissioning of the ECFanGrid is a well-managed process.
Easy access for service
When an ECFanGrid is installed in an AHU or HRV interior space is gained, inside the cabinet that allows easy access for service personnel to do preventative maintenance or replacement of modules.
CONSULTING AND ENGINEERING FIRMS
Engineers & consultants
Energy Efficiency Upgrades. The ECFanGrid is an array of fans each capable of variable speeds. Use your building management systems or control automation equipment to vary the fan’s speed on demand.
Utility-Sponsored Funding Incentives Available
For energy audits and retrofit incentives are available for your customers, check our interactive map for your province to see where funding is available for engineering, modeling and consulting.
High Efficiency
EC Motors are the most efficient motors in the market for energy savings.
Space Saving
ECFanGrid is often more compact and lighter than a single large blower.
Easy Wiring & Compatibility with Building Management Systems
The ECFanGrid performance is controlled by external signals. Setting it up is easy and does not require complicated software or control architecture.
It can be easily interfaced to your existing building management system.
Plug & Play Kits
The ECFanGrid Kit is a pre-engineered comprehensive solution that provides all the parts needed for a successful AHU installation project.
PROPERTY OWNERS
No expensive building envelope renovation
An ECFanGrid consisting of several smaller fans is designed to replace a large single fan. Components are small enough to easily move through existing doorways. No need to rent expensive equipment like a crane.
Reduce downtime during retrofits
On some projects, it is possible to install an ECFanGrid while the single original fan is still operating.
Increased system reliability
An ECFanGrid consisting of several smaller fans is designed to replace a large single fan. If one fan in the grid fails the others will increase speed. The result is no downtime due to failures.
Utility-Sponsored Funding Incentives Available
For energy audits and retrofit incentives are available for your customers, check our interactive map for your province to see where funding is available for engineering, modeling and consulting.
Plug & Play
The ECFanGrid retrofit kit is a ‘plug and play’ solution that reduces the installation time and labour on your retrofit project. Rosenberg’s ECFanGrid kit includes the fans, a grid layout, inlet cones and cone plates, mounting supports to create a structure, sheet metal fill plates and all of the assembly hardware. We offer a pre-assembled Control Cabinet complete with circuit breakers and an additional 24V power supply that saves time on-site.
High Efficiency
EC Motors (ECM technology) are the most efficient motors in the market for energy savings and energy-efficient buildings.
Space Saving
ECFanGrid is often more compact and lighter than a single large blower.
Easy wiring and compatibility with Building Management Systems
The ECFanGrid performance is controlled by external signals. Setting it up is easy and does not require complicated software or control architecture.
OEM’s
FEATURES:
Energy Efficient
We use our variable speed EC fans built with our external rotor motors to lower energy consumption across the whole range of operation. We meet or exceed the European energy standard ErP 2015, the highest in the world. Our EC fans qualify for Canadian and Provincial energy efficiency program grants, loans and incentives.
Uniform Airflow
The ECFanGrid delivers uniform airflow. This improves efficiency by reducing turbulence across heat exchangers and through filters.
Easily Controlled
Our EC motors allow the ECFanGrid to be variable speed. Using control signals (0-10V or 4-20mA) from sensors or building management systems, the ECFanGrid will automatically adjust to changing conditions. Using control sensors automate your system to adjust for differential pressure, constant airflow, temperature, CO2, fault detection, emergency alarms and more.
Cost-savings - Compact
The smaller footprint of the ECFanGrid can reduce the space requirement for the fans by up to *70%. *(as compared to a single large fan) Reduce your costs to produce your equipment, reduce the customer’s space requirement for your product and free up space.
Lighter
Compared to traditional systems that use single large fans our ECFanGrid is lighter. This means less mechanical load on support structures and may reduce construction costs as well as equipment installation costs.
Quieter
The total sound power of the ECFanGrid is the same as other systems but the frequency spectrum is higher. Higher frequencies require smaller attenuators, which minimizes the space needed for the air handling systems.
Redundant Specifications
Some customers require extra capacity in their critical system applications such as hospitals, data centers, schools or other public facilities, The system design strategy that uses multiple fans, will provide your system with fault tolerant operation and eliminate downtime. Systems can be designed to allow for service to filters or replacement of fans while the air handling system is running. Explore the cost-saving advantages and possibilities that multiple fan systems offer when customers ask for redundant fan systems.
OEM Designs and Customization
Rosenberg Fans Canada Ltd. has lots of experience working with equipment manufacturers across Canada. Ask one of our technical sales people how our design and customization program will support your design team. We can help with product improvements or new equipment designs to incorporate the newest Rosenberg Fan technologies into your systems. Our 4 development centers and dedicated engineers are here to support our Canadian OEM customers
Canadian Inventory and Customer Service
Rosenberg Fans Canada Ltd. has EC Fan inventory at our Mississauga, Ontario location. We support our OEM customers with dedicated inventory to minimize your delivery lead-time. Our EC Fans are CSA and UL listed and are available in sizes from 200 mm to 1,000 mm diameter, in different materials and voltages.
Visit Rosenberg Canada website.
Learn more about Rosenberg’s Retrofit Kit
Simple and clean. Plug and Play.
Ease of control and versatility

Electronically commutated motors (EC motors or ECM) integrate the advantages of electronics to:
Drive – directing power electronically to different coils is what drives the motor, this makes the motor extremely efficient in the usage of energy.
Control – intelligent technology that allows the motor to be controlled with ease. Speed can be controlled by the use of a simple potentiometer (0-10 V) in (open loop) with a secondary setting (closed loop) to make speed dependent on any external condition (differential pressure, temperature, humidity, etc.)
Power – Rosenberg motors can handle 120 V single phase, 230-460 V three phase and up to 600 V with our dedicated transformer for the Canadian market.
EC motor powered fans are efficient, intelligent and versatile.

Redundancy and Reliability
Retrofitting with our ECFanGrid instead of a single fan provides reliability and redundancy as well as flexibility for any given ventilation system. If one fan fails the remaining units on the grid will pick up the lack of air flow. The fans will increase speed and hold at the desired setting until the fan is replaced. In critical applications where constant air flow is required, this feature offers a sound solution and much more reliability than a single fan, no downtime when failure or servicing.

Flexibility
With our multiple EC motor and plug fan sizes, the Rosenberg ECFanGrid or Unobox are able to adapt to any type of grid depending on the geometry of your actual installation. The combination of impeller size and motors will provide the desired output on flow and pressure.

Ease of handling and installation
Due to the compact size and weight of Rosenberg’s ECFanGrid retrofit kit and Unobox, the fans are easy to move, lift, and place into difficult and complicated spaces. This is a huge advantage over larger and bulkier single fan retrofit installations where demolition, lifting, and special equipment is required.

One stop source for all components
Rosenberg ECFanGrid retrofit kit includes: — our analysis on how to accommodate the grid; the mechanical performance calculations including electrical and power consumption; drawings and documentation; the required fans and inlet cones; adaptive structural supports for complete stability (top, bottom, side and between components); sheet metal fillers; complete wiring cabinet with protections and supplementary control power supply. Optional components include 600 V power adapter module, grills, potentiometer and local controllers with transmission capabilities and more. This is a one in all Rosenberg solution.
Multiple provincial incentive programs for the installation of VFD’s delivered by local hydro companies are available for retrofitting commercial, industrial and residential ventilation systems. Rosenberg EC fans are in compliance with these retrofit incentives in different ways:
- Variable Speed Control Ready
- Multiple Control Configurations with easy setup. (Peak demand timer, Differential pressure, Temperature etc.)
- Less Power Consumption at the same operating point if compared with an AC motor. view comparison table
Our goal is to provide our customers with all the tools needed for a successful retrofit project. With our Rosenberg Retrofit Kit ,we deliver all the elements to fit the ECFanGrid inside the plenum of any existing AHU.
PROVINCES
RETROFIT KIT
TABLE

LiveSmart BC Incentive and Rebate Programs are designed to empower British Columbia citizens, businesses and consumers to make smarter, greener lifestyle choices. The decision to take climate action may come in the form of behavior changes (modes of transportation, home utility usage), consumer choices (energy and fuel efficient products, home heating systems), or efficiency and conservation decisions (home retrofits, business upgrades).
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The Municipal Climate Change Action Centre (MCCAC) provides funding, technical assistance, and education to support Alberta municipalities in addressing climate change. The MCCAC is a partnership between the Government of Alberta, the Alberta Association of Municipal Districts and Counties (AAMDC), and the Alberta Urban Municipalities Association (AUMA).
The Taking Action to Manage Energy (TAME+) program provides tools and funding to help municipalities understand how energy is used in their buildings, identify key savings opportunities, and implement retrofit projects. For detailed information on eligibility requirements, available funding, and how to apply, please refer to the TAME+ Guidebook.


Save on Energy Retrofit incentives reduce project and operational costs for equipment upgrades – and open the door to new possibilities for your business.
Whether it’s a lighting upgrade, motor and heating installations or new control systems, incorporating energy efficiency into your operations delivers benefits that reach far beyond your energy bill.
Eligible measures under the program are those that provide sustainable, measurable and verifiable reductions in peak electricity demand and/or electricity consumption and below are some examples:
- Lighting retrofits
- Lighting controls
- HVAC redesign
- Chiller replacement
- Variable speed drives

The Government of Saskatchewan with its goGreen program is committed to finding solutions to the environmental challenges facing our province, our country and our planet. Due to our reliance on coal, natural gas and other fossil fuels, Saskatchewan has a high greenhouse gas emissions rate. To sustain the province's natural resources and maintain a good quality of life for residents and generations to come, the provincial government is committed to finding a balance between growth and environmental protection - encouraging residents, communities and businesses to reduce their carbon footprint in their day-to-day lives.
Other useful links for saving on energy in Saskatchewan:


Manitoba Hydro with its Power Smart Program has saved a total of $150 million on the energy bills to its customers since the introduction. This Demand Side Management initiative not only saves money, it also allows them to export their renewable energy to other provinces and states that rely on fossil fuels.
Power Smart Program will help their customers save on bills, help meet the future energy needs of Manitobans, build Manitoba’s green economy, and help the environment.
In most businesses, heating, ventilation, and cooling typically account for 40 to 60 per cent of energy costs. A great way to reduce energy consumption and offset rising fuel costs is to replace old, inefficient equipment with energy efficient technologies.
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takeCHARGE can help identify and pay for energy efficiency improvements for your facilities through the Business Efficiency Program.
Get money back when you invest in energy efficient upgrades in heating and cooling, refrigeration, lighting and controls, and more. You can also get money back when you reduce demand.
Energy efficient upgrades will lower your electricity costs, contributing to your bottom line every month! These improvements can also help reduce other costs in areas like maintenance.
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The Power NB's Retrofit Program provides financial incentives of up to $3,000 towards an evaluation to determine the potential for energy efficiency upgrades in a commercial building and a maximum of $75,000 towards the energy retrofitting project costs that result in measurable electricity savings.
In order to qualify for incentives, please ensure your Energy Management Service Provider has met, and will meet, the Energy Smart Program requirements.
Some examples of eligible buildings are:
- Arenas and curling rinks
- Retail buildings
- Large multi-unit residential buildings footprint larger than 6,456 square feet or 600 square metres)
- Hotels and motels
- Restaurants
- Recreational facilities
- Office buildings
- Grocery stores
- others

Efficiency Nova Scotia with its Building Optimization Program gives your aging building the tune up it needs.
Imagine returning your older building to its original glory: running at peak performance, saving up to 15% on energy bills and making everyone inside more comfortable.
Their recommissioning specialists will work with you to ensure your building is working properly and set for optimal efficiency, including reviewing:
- Original operating documents
- Equipment
- Temperature settings
- Scheduling
Rosenberg Fans Canada Ltd. is launching a unique concept that contemplates all the elements needed when thinking on retrofitting old coupled through belts or other inefficient types of fans to outdated non-premium motors.
We have the only solution that allows efficient external rotor EC motors fans (ECM) to be mounted directly to the plenum.
Our EC FAN RETROFIT KIT can be fitted into any existing manufacturing casing all complete and includes:
- 1. External Rotor Motor EC Fans (Backward inclined)
- 2. Inlet Plate
- 3. Inlet Cone with Measuring device
- 4. Mounting supports
- 5. Internal structural reinforcements to mount the fans
- 6. Wiring cabinet
- 7. Metal Sheet Fillers
- 8. Fastening bolts and screws
Download Brochure for more details about Rosenberg Retrofit Kit
rosenberg ec fan grid with external rotor ec motor |
plenum fan coupled to nema premium efficiency motor |
|
---|---|---|
required duty | 12, 992 CFM @ 2.6 IWG | 12, 992 CFM @ 2.6 IWG |
model | rosenberg 2x2-4f-gkhm-400-cib.6ff | rosenberg dknb-b630 |
# of motors | 4 | 1 |
noise level | 91dBA | 96dBA |
nominal speed (rpm) | 2600 | 1765 |
nominal power (hp) | 18.77 | 15 |
operating point power (hp) | 9.54 | 10.63 |
operating point speed (rpm) | 2069 | 1800 |
operating point power consumption (hp) | 7.12 kW | 9.84 kW |
current @ op (A) | 10.8 | 13.8 |
maximum flow | 16.163 CFM | 12.992 CFM |
speed control | ready | vfd is necessary |
*TRUE ETA RATING BY ROSENBERG VENTILATOREN GmbH Rovent
** NOMINAL DATA FOR NEMA BY TECO-WESTINGHOSE
An old belt-driven 10 HP fan has been replaced by two of Rosenberg's quiet and energy-efficient EC (ECM) fans.
A 2 by 1 ECFanGrid is supplying 9,375 CFM at 2.2" of total static pressure with a total input power of 7.6 HP
Our very efficient composite "E”-wheel impellers were used in this project. Description of Rosenberg's impellers can be found here.
The speed is controlled with a simple potentiometer provisionally. The final upgrade will include automation and communication with the building management system using the analog and digital communication ports that are integrated into each of Rosenberg’s EC fans.




Thanks to those of you who stopped by our booth at the CMPX-2018 in Toronto!
We were pleased meeting you and to have a chance to offer you our products, services, and solutions.
Click Read More to check out the Video from the event.

All new RoVent 10 !
Robust and intuitive, it delivers much more data, more efficiently.
Click "Read more" for step-by-step Tutorials and Download link.

New AHU Installation for Community Amphitheatre in Edmundston, NB
- Supply:4x6 Fan Grid/24 Fans in total
- Return:3x4 Fan Grid/12 Fans in total

Rosenberg Fans Canada is Introducing our new 5.5kW / 7.4 h.p. EC Motor (ECM) combined with high efficiency backward curved aluminium wheel.
Mississauga, ON
L5T 2B8
Canada
Tel: (905) 565-1038 (head office)
Tel: (514) 592-7462 (QC, NS, NB, NF)
Tel: (403) 992-6042 (SK, AB, BC)
Fax: (905) 565-0161
Email: info@rosenbergcanada.com
www: www.rosenbergcanada.com
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Halifax N.S.
B3S 1B5
(902) 453-4030
info@curtisagencies.ca