Retrofit made simple. Efficiency made real.
From quick fixes to smart upgrades — discover proven strategies, tools, and products to boost HVAC performance without major downtime.
Optimise before you oversize
Oversized facilities hide control issues and waste energy. Fix the control first, measure real demand, and then decide on energy source upgrades.
1. Stabilise hydronics
- Balance circuits and maintain delta T
- Convert to variable flow with pressure reset
- Fix sequencing and low valve authority
2. Demand-led ventilation
- Use demand-controlled ventilation
- Reset supply temperature and pressure to occupancy and weather
- Maintain comfort and indoor air quality within clear targets
3. Prove, then replicate
- Document before/after plots and final setpoints
- Lock settings to prevent drift
- Apply the same playbook in similar buildings
Proven strategies to improve HVAC efficiency
Enhancing system performance doesn’t have to be complex. By restoring balance, upgrading key components, and leveraging real-time monitoring, you can achieve the following without major disruptions:
- Immediate efficiency gains
- Lower operating costs
- Extended equipment lifespan
Savings potential:
27%
Essential: Restore and optimise system performance
Unlock immediate efficiency gains without replacing hardware. Focus on fine-tuning existing system settings — adjusting temperature setpoints and balancing hydronic circuits — to eliminate hidden inefficiencies. This quick, cost-effective approach restores peak performance with minimal disruption, making it ideal for facilities seeking fast results.
35%
Enhanced: Upgrade field devices for better performance
Take performance to the next level by modernising critical components. Replace aging valves, actuators, and sensors with advanced technology for a seamless upgrade. This proactive step restores efficiency and reliability while significantly improving overall system performance — ensuring smoother, more robust operations without major downtime.
55%
Advanced: Implement smart monitoring and close the performance gap
Reach peak HVAC efficiency with advanced monitoring and control. Leverage real-time data, dynamic delta T management, and continuous optimisation to ensure energy is distributed efficiently and transparently. Integrating solutions like the Belimo Energy Valve™ reduces energy waste and keeps systems performing at peak efficiency — all with minimal downtime.
RetroFIT+ redefined
The fastest way to enhance efficiency: Install Belimo Energy Valves; drop-in devices that restore design delta T, enforce flow authority, balance branches with minimal disruption, and add transparency.
Energy Valve
- Immediate impact: higher delta T, lower pump kW, steadier zones
- Data transparency: Built-in flow and energy data, live delta T, clean exports
- Minimally invasive: retrofit kits, compact sizes, night/weekend swaps
- Balanced systems: automatic flow authority, detects bypasses and rogue loops
- Ideal for: CHW/HW coils on AHUs, FCUs, problem floors, pre-electrification tune-ups
Application guide for practitioners
Replacing old components has never been easier.
With the RetroFit+ Product Replacement Tool, simply enter the product name or upload a photo to find the ideal Belimo replacement.
Products by job
Smart HVAC products optimise performance, reduce energy waste, and enhance control — ensuring your system operates only when and where it’s needed. By upgrading with advanced sensors for greater transparency, pressure-independent systems, and higher automation, you can achieve significant energy savings, lower operating costs, and extend equipment lifespan — all while improving comfort and sustainability.
Indoor air quality
Room units
Duct sensors (air)
Damper actuators
Variable air volume (VAV)
Stabilise hydronics
Belimo Energy Valve TM
Pressure-independent control valves
Thermal Energy Meter
Pipe sensors
Zone valves
Ventilation efficiency
Variable air volume (VAV)
Damper actuators
Duct sensors (air)
Room units
Success you can measure
From reducing gas consumption by half at our Großröhrsdorf site to helping a New York City property manager reduce carbon emissions by 40%, Belimo solutions deliver real-world impact in energy efficiency. Discover how our customers achieve more with RetroFIT+.
Embarcadero Center, San Francisco (USA)
How can you modernise a 40 year old high rise without a major capital investment?
Targeted HVAC retrofit reduces energy use by 28%.
At San Francisco’s iconic Four Embarcadero Center, an aging chilled water system with 2-way pressure-dependent globe valves and pneumatic actuators was struggling with low differential pressure (delta T), rising energy costs, and no visibility into hydronic performance.
Retrofitting the building with Belimo Energy Valves converted the legacy system to pressure‑independent control. The result: improved delta T, real‑time system visibility, and hidden faults brought to light. The upgrade reduced chiller plant energy use by 28%, delivering around $131,000 in annual energy cost savings.
Success Story
Embarcadero Center, San Francisco (USA)
United States
How can you modernise a 40 year old high rise without a major capital investment?
Targeted HVAC retrofit reduces energy use by 28%.
At San Francisco’s iconic Four Embarcadero Center, an aging chilled water system with 2-way pressure-dependent globe valves and pneumatic actuators was struggling with low differential pressure (delta T), rising energy costs, and no visibility into hydronic performance.
Retrofitting the building with Belimo Energy Valves converted the legacy system to pressure‑independent control. The result: improved delta T, real‑time system visibility, and hidden faults brought to light. The upgrade reduced chiller plant energy use by 28%, delivering around $131,000 in annual energy cost savings.
Allseas (Netherlands)
82% energy savings on the high seas: Allseas optimises its fleet with the Belimo Energy Valve™
Allseas, a company with global leadership in the offshore energy sector, is setting new standards in HVAC efficiency. To ensure the sustainable operation of the fleet and the comfort of up to 500 employees per vessel, the heating and cooling systems of the Allseas ships are being gradually equipped with Belimo Energy Valves.
A special highlight of these modernisation measures is the retrofit of the "Pioneering Spirit", the world's largest construction vessel. The vessel, which can raise offshore platforms weighing up to 60,000 tons in a single lift, achieved impressive results by installing 175 Energy Valves: the pumps' current consumption was reduced from 600 kW to 120 kW — an energy saving of 82%.
Thanks to this targeted Belimo RetroFIT+ measure, Allseas is now saving approximately EUR 700,000 in energy costs each year. As a result of these significant savings, the project's payback period is just three years. This means that the company is making a significant contribution to economic efficiency and to the reduction of the ecological footprint of the offshore industry.
Watch our video to learn how Allseas is using innovative Belimo valve technology to maximise energy efficiency at sea and significantly reduce operating costs.
Success Story
Allseas (Netherlands)
Netherlands
82% energy savings on the high seas: Allseas optimises its fleet with the Belimo Energy Valve™
Allseas, a company with global leadership in the offshore energy sector, is setting new standards in HVAC efficiency. To ensure the sustainable operation of the fleet and the comfort of up to 500 employees per vessel, the heating and cooling systems of the Allseas ships are being gradually equipped with Belimo Energy Valves.
A special highlight of these modernisation measures is the retrofit of the "Pioneering Spirit", the world's largest construction vessel. The vessel, which can raise offshore platforms weighing up to 60,000 tons in a single lift, achieved impressive results by installing 175 Energy Valves: the pumps' current consumption was reduced from 600 kW to 120 kW — an energy saving of 82%.
Thanks to this targeted Belimo RetroFIT+ measure, Allseas is now saving approximately EUR 700,000 in energy costs each year. As a result of these significant savings, the project's payback period is just three years. This means that the company is making a significant contribution to economic efficiency and to the reduction of the ecological footprint of the offshore industry.
Watch our video to learn how Allseas is using innovative Belimo valve technology to maximise energy efficiency at sea and significantly reduce operating costs.
Paramount Group, New York (USA)
Belimo Energy Valve™ helps New York City Property Manager cut carbon emissions by 40%
In response to a regulatory mandate starting in 2024 in New York City that focused on improving energy efficiency and reducing CO2 emissions for large buildings, a leading property management company upgraded key buildings with the Belimo Energy Valve™, a pioneering, IoT-enabled device designed to optimise energy consumption in HVAC systems and reliably maintain delta T.
The upgrade dramatically cut energy consumption and costs – saving over USD 1 million on electricity costs in 2023 alone. In addition, Paramount received USD 2.1 million in financial incentives from utility companies for its efforts, aligned its buildings with CO2 reduction goals for 2030, and secured important sustainability certifications. This marks a significant stride towards the 2050 CO2 neutrality target, demonstrating a strong commitment to sustainability and efficiency.
Watch the video to find out more about the CO2 reductions and cost savings.
Success Story
Paramount Group, New York (USA)
United States
Belimo Energy Valve™ helps New York City Property Manager cut carbon emissions by 40%
In response to a regulatory mandate starting in 2024 in New York City that focused on improving energy efficiency and reducing CO2 emissions for large buildings, a leading property management company upgraded key buildings with the Belimo Energy Valve™, a pioneering, IoT-enabled device designed to optimise energy consumption in HVAC systems and reliably maintain delta T.
The upgrade dramatically cut energy consumption and costs – saving over USD 1 million on electricity costs in 2023 alone. In addition, Paramount received USD 2.1 million in financial incentives from utility companies for its efforts, aligned its buildings with CO2 reduction goals for 2030, and secured important sustainability certifications. This marks a significant stride towards the 2050 CO2 neutrality target, demonstrating a strong commitment to sustainability and efficiency.
Watch the video to find out more about the CO2 reductions and cost savings.
Belimo Office, Großröhrsdorf (Germany)
Gas consumption halved: Belimo's energy savings through retrofitting at Großröhrsdorf site
Belimo is committed to increasing energy efficiency and reducing CO₂ emissions in buildings. An example of our initiative is the upgrade of the heating system at our Großröhrsdorf site in Germany, which covers an area of approximately 19,000m2.
Before our own RetroFIT+ specialists intervened, the site consumed 750,000 kWh of gas annually. Through a series of targeted adjustments and modernisation measures, we successfully halved this consumption, resulting in an annual saving of 75 tons of CO₂.
The payback period was approximately one year, and the annual savings amounted to EUR 38,000.
Watch our video to see the practical steps and technologies Belimo has employed to decrease energy use, lower costs, and contribute positively to the environment.
Success Story
Belimo Office, Großröhrsdorf (Germany)
Germany
Gas consumption halved: Belimo's energy savings through retrofitting at Großröhrsdorf site
Belimo is committed to increasing energy efficiency and reducing CO₂ emissions in buildings. An example of our initiative is the upgrade of the heating system at our Großröhrsdorf site in Germany, which covers an area of approximately 19,000m2.
Before our own RetroFIT+ specialists intervened, the site consumed 750,000 kWh of gas annually. Through a series of targeted adjustments and modernisation measures, we successfully halved this consumption, resulting in an annual saving of 75 tons of CO₂.
The payback period was approximately one year, and the annual savings amounted to EUR 38,000.
Watch our video to see the practical steps and technologies Belimo has employed to decrease energy use, lower costs, and contribute positively to the environment.
Ready to act?
Start your RetroFIT+ journey today.
Downloads
RetroFIT+ Guides and Checklists
RetroFIT+ Guide
Guide
6.23 MBApplication book – Air handling units (AHUs)
Application book
9.41 MBBrochure – Guidance document for indoor air quality
Brochure
2.55 MB