At Controlled Air, Inc., we eliminate those friction points through our Design-Build delivery. By integrating engineering, custom fabrication, and installation into a single-source solution, we take full responsibility for your facility’s climate and energy future. Not only does it save time, but it saves cost as well, by eliminating the need for a separate engineer and/or construction manager.  

Design-Build vs. Traditional Plan-Spec 

Why Single-Source Responsibility Wins 

1. The “No Finger-Pointing” Guarantee 

In a typical project, if a control sequence fails or a unit doesn’t fit the roof curb, the contractor blames the engineer, and the engineer blames the installer. With Controlled Air, that conflict is eliminated. Because we are the engineer and the installer, we own the outcome. If a challenge arises, we solve it internally without the multiple change orders. 

2. Accelerated “Speed to Market” 

Time is the greatest cost of construction. Our Design-Build model allows us to overlap phases. We can begin site preparation, equipment procurement (critical for long-lead items), and in-house duct fabrication while the final engineering stamps are being applied. This typically reduces project schedules by 10–30%. 

3. In-House Precision 

Our Branford facility houses specialized sheet metal fabrication and piping departments. Unlike firms that outsource these critical components, we manufacture to the exact specifications of our design team. This ensures that what is drawn in CAD is exactly what is installed in the field. 

The Specialized Advantage: Efficiency-Driven Design 

While the Design-Build model provides the structure, our specialty in energy efficiency provides the value. We don’t just build systems that work; we build systems that pay you back.

• Our Energy Specialty: Because energy efficiency is our core focus, it makes for a better Design-Build process. We use advanced modeling to “right-size” equipment, ensuring you aren’t paying for excess capacity that wastes energy and increases maintenance costs. 
• Integrated Controls: We design the mechanical hardware and the Building Automation System (BAS) simultaneously. This ensures “native” communication between systems, preventing the energy-wasting “fighting” between heating and cooling cycles common in piecemeal installs. 
• Futureproofing: Our designs account for 2026 sustainability standards and ROI-driven technologies like Gas Heat Pumps and Cogeneration (CHP) from the very first sketch. 

Long-Term Facility Value 

An HVAC system is a 20-year investment. A Design-Build project with Controlled Air focuses on the Total Cost of Ownership, not just the initial bid. 

• Serviceability by Design: Because we also provide 24/7 service, our engineers design systems that are actually maintainable. We don’t bury components in inaccessible corners; we design for a lifetime of easy access and lower repair costs. 
• Enhanced Asset Value: A high-efficiency, well-documented Design-Build system increases a building’s “Green” rating and marketability, protecting the owner’s equity against rising utility costs. 

Partner with Controlled Air, Inc. 

Since 1980, we have been the premier Design-Build partner for general contractors, architects, and facility owners across Connecticut and Rhode Island. Let us take the complexity out of your next mechanical project. 

The post The Design-Build HVAC Advantage: Streamlining Complexity, Increasing Efficiency appeared first on Controlled Air, Inc..

In the world of commercial buildings, efficient and reliable HVAC isn’t just a luxury, it’s a necessity. It impacts everything from tenant comfort and employee productivity to your bottom line. As part of Yanmar, we’re incredibly excited to unveil: the New Yanmar Rooftop Unit (RTU).

This isn’t just another HVAC system; it’s a testament to superior design, unparalleled efficiency, and a commitment to long-term value. Let’s dive into what makes the Yanmar RTU the smart choice for your next commercial HVAC upgrade.

Engineered for Excellence, Built for Performance

The New Yanmar RTU embodies our core philosophy: to deliver robust, efficient, and reliable solutions. Every aspect of this unit has been meticulously designed to maximize comfort while significantly minimizing operating costs.

• Exceptional Efficiency: With an impressive IEER (Integrated Energy Efficiency Ratio) of up to 21.3, the Yanmar RTU sets a new standard for energy savings. This high efficiency translates directly into lower utility bills, making it a sound investment that pays dividends over its lifespan.
• Durable Construction: We know that a rooftop unit needs to withstand the elements. That’s why the Yanmar RTU features double-wall, 20-gauge panels, providing superior durability, enhanced thermal performance, and quieter operation.
• Made in the USA: Quality control and efficient logistics are paramount. Being Made in the USA not only ensures the highest standards of manufacturing but also allows for lead times as short as 4 weeks, getting your new system up and running faster.

The Power of Choice: Three Models for Every Need

Understanding that every commercial space has unique requirements, the Yanmar RTU comes in three versatile models:

1. Standard Rooftop Unit: Our core offering provides robust and efficient heating and cooling, perfect for a wide range of applications. Download Brochure
2. Advanced Heat Pump Technology with Dual-Fuel Capability: This innovative model integrates an advanced electric heat pump with natural gas auxiliary heat. It intelligently shifts between electric and gas operation based on outdoor temperatures, ensuring year-round climate control that is both cost-effective and energy-efficient. It’s intelligent climate control that adapts to your environment. Download Brochure
3. Dedicated Outdoor Air Rooftop Unit (DOAS): Designed to deliver precisely conditioned outdoor air, improving indoor air quality and ventilation for healthier, more comfortable environments. Download Brochure

Unmatched Peace of Mind: Industry-Leading Warranties

Investing in an HVAC system is a significant decision. We stand by the quality and durability of the Yanmar RTU with warranties that truly set us apart:

• 5-Year Parts Warranty: Our comprehensive parts warranty covers your investment, reflecting our confidence in the components we use.
• 25-Year Non-Prorated Heat Exchanger Warranty: This is an industry-leading commitment. A non-prorated warranty means that the coverage value does not decrease over time, ensuring your critical heat exchanger is protected for a quarter-century. This offers unparalleled long-term security and peace of mind.

Simplifying Your Upgrade: A Seamless Transition

We believe that upgrading your commercial HVAC system shouldn’t be a headache. The Yanmar RTU is designed for a seamless transition:

• Innovative In-House Curb Adapters: Our specially designed curb adapters ensure a simple, reliable swap that perfectly fits your existing footprint. This dramatically reduces installation time and complexity, minimizing disruption to your business operations.
• Fast Availability: With units Made in the USA and lead times as short as 4 weeks, you can experience the benefits of superior comfort and efficiency sooner rather than later.

Experience the Yanmar Difference

The New Yanmar Rooftop Unit represents the pinnacle of commercial HVAC technology—combining advanced features, robust construction, exceptional efficiency, and unparalleled warranties. It’s more than just a unit; it’s a strategic investment in the comfort, efficiency, and long-term value of your commercial property.

Ready to elevate your building’s performance? Contact us today to learn more about the Yanmar RTU and discover how it can transform your commercial HVAC experience.

The post Experience the Next Generation of Commercial HVAC: Introducing the New Yanmar Rooftop Unit appeared first on Controlled Air, Inc..

What is Legionnaires’ Disease?

Legionnaires’ disease is not spread from person to person. You get it by inhaling tiny water droplets containing the Legionella bacteria. Symptoms, which typically appear 2 to 14 days after exposure, are similar to other types of pneumonia and can include:

• High fever
• Chills and muscle aches
• Cough and shortness of breath
• Headache

People over 50, current or former smokers, and those with weakened immune systems or chronic lung disease are at a higher risk of developing the illness. A milder, non-pneumonic form of the disease, called Pontiac fever, also exists, causing flu-like symptoms that usually clear up on their own without treatment.

The HVAC Connection

Large, complex HVAC systems, particularly those with cooling towers, are a significant source of Legionnaires’ disease outbreaks. Cooling towers use water to remove heat from a building, and if not properly maintained, the warm, stagnant water can create an ideal breeding ground for Legionella bacteria. The bacteria can then become aerosolized and spread throughout the building or even to nearby areas, infecting anyone who breathes in the contaminated mist.

This isn’t a concern for small, residential window units or central air conditioners that don’t use water to cool the air. The risk is primarily associated with large-scale systems found in places like:

• Hospitals and nursing homes
• Hotels
• Large office buildings
• Industrial facilities

A Recurring Concern: Recent Outbreaks in NYC

The threat of Legionnaires’ disease is not a historical footnote; it remains a current and serious public health issue. New York City, in particular, has seen a recent cluster of cases, highlighting the ongoing risk. In late July 2025, a sudden outbreak in Central Harlem sickened dozens and, tragically, led to several deaths. Health officials in the city quickly investigated and identified 11 cooling towers in the area that tested positive for Legionella bacteria. All of the contaminated towers were promptly cleaned and disinfected according to city regulations.

This isn’t an isolated incident. The New York City Department of Health and Mental Hygiene has a robust system for surveillance and has previously addressed other outbreaks. The city’s regulations, which mandate the registration and regular maintenance of all cooling towers, are a direct response to the recurring public health threat posed by improperly managed water systems. These incidents serve as a stark reminder of why proactive maintenance is not just a best practice, but a critical legal and ethical responsibility for building owners.

The Importance of HVAC Maintenance

Regular, proactive HVAC maintenance is the single most effective way to prevent the growth and spread of Legionella bacteria. By implementing a comprehensive water management plan, building managers can significantly reduce the risk of an outbreak. Key maintenance practices include:

• Routine cleaning and disinfection: Cooling towers should be cleaned and disinfected at least twice a year, and more often if heavy biofouling or high bacteria levels are detected.
• Temperature control: Legionella thrives in warm water. Maintaining cold water systems at temperatures below 68°F (20°C) and hot water systems above 140°F (60°C) can inhibit bacterial growth.
• Avoiding water stagnation: Stagnant water in unused pipes, tanks, or drain pans provides a perfect environment for Legionella to multiply. Regularly flushing unused outlets and ensuring proper drainage is essential.
• Biocide treatments: Using chemical biocides, such as chlorine, helps control microbial growth in the water systems.

Proper HVAC maintenance isn’t just about efficiency and comfort—it’s a critical for health. By following a regular maintenance schedule, building owners and managers can protect occupants from a serious and preventable disease.

The post Protecting Your Lungs: The Critical Link Between HVAC Maintenance and Legionnaires’ Disease appeared first on Controlled Air, Inc..

This is where a professional energy evaluation comes in. More than just a review of your utility bills, an energy evaluation is a deep dive into your facility’s energy patterns, revealing hidden inefficiencies and pinpointing opportunities for significant improvements. At Controlled Air Inc., our Agile Facility Management (AFM) System is built on this very principle, designed to empower building owners with the knowledge they need to take control of their energy future.

What Does an Energy Evaluation Uncover?

An energy evaluation, particularly through an approach like our AFM System, goes beyond surface-level observations. It meticulously analyzes your building’s systems – from HVAC and lighting to insulation and operational schedules – to understand exactly how and where energy is being consumed. The goal is to provide informative and utilizable information that translates directly into actionable insights.

The Transformative Benefits for Your Business:

Engaging in a comprehensive energy evaluation offers a multitude of benefits that directly impact your bottom line and operational efficiency:

1. Uncover the True Cost of Ownership: Your energy bill is just a number, but an evaluation breaks down what that number truly represents. It educates you on the real cost of ownership related to your energy consumption, helping you understand the financial implications of every watt and therm. This clarity is the first step toward effective management.
2. Achieve Significant Energy Budget Reductions: The primary objective of an energy evaluation is to identify ways to save money. By pinpointing inefficient equipment, operational waste, and areas for improvement, businesses can implement targeted Energy Conservation Measures (ECMs) that offer the highest Return on Investment (ROI). This means tangible, measurable reductions in your monthly energy expenditures.
3. Make Informed Energy Service Decisions: Guesswork leads to wasted resources. An energy evaluation provides the data and insights necessary to make informed energy service decisions. You’ll understand which upgrades are truly beneficial, which maintenance strategies are most effective, and how technology can be leveraged to optimize your energy use.
4. Drive Operational Excellence: Energy efficiency isn’t just about saving money; it’s about optimizing how your entire facility runs. By addressing energy inefficiencies, you often streamline operations, improve system performance, and enhance the overall reliability of your building’s infrastructure. This contributes directly to achieving operational excellence.
5. Establish Environmental Leadership: In an era where sustainability is increasingly important, an energy evaluation helps you reduce your carbon footprint. By consuming less energy, your business demonstrates a strong commitment to environmental responsibility, enhancing your brand reputation and potentially meeting regulatory requirements. Becoming an environmental leader can also appeal to eco-conscious customers and partners.
6. Increase Asset Value: An energy-efficient building is a more valuable asset. Lower operating costs and a reduced environmental impact make your property more attractive, whether for long-term ownership or potential resale.

Take Control of Your Energy Future

Don’t let hidden energy waste drain your profits. An energy evaluation is the foundational step toward smarter energy management, leading to substantial savings, improved operations, and a stronger commitment to sustainability.

Ready to unlock the full potential of your facility? Contact us today to learn how an energy evaluation can benefit your business.

The post The Power of Knowing: Why Energy Evaluations Are Essential for Your Business appeared first on Controlled Air, Inc..

The post Boiler Replacement, Southbury CT | Pomperaug High School appeared first on Controlled Air, Inc..

1. The school needed to provide cooling to the entire school. Any additional equipment added to their current HVAC could potentially overload their electrical system, making cooling the entire school a challenge.
2. Josephs wanted to be energy efficient and reduce their expenses.
3. They had an older steam boiler for heating that was inefficient and expensive to run.

Controlled Air Inc. investigated multiple solutions including typical electrical VRF and a YANMAR VRF (GHP) gas powered heat pump system. Through analysis it was determined that the YANMAR VRF GHP would be the best solution for the school. The YANMAR VRF GHP would meet their requirements, by providing heating and cooling, reducing power demand, decreasing the need for the steam boiler, as well as being energy efficient. Since the Yanmar requires less electrical power to run the school would have the ability to add cooling throughout the school without overloading their electrical system. Additionally, the YANMAR system removed the need to use the steam boiler to heat the gym, reducing the need to run the boiler.

Controlled Air INC. installed four YANMAR 14-ton gas heat pumps which included two air handler units with variable air flow. Also included was the newest Johnson Controls FX-80 supervisory front end controller with a web based interface. The new system was 20% more efficient than  the electric cooling alternative and 50% more efficient than the current steam heating.

YANMAR

The YANMAR Variable Refrigerant Flow (VRF) natural gas heat pump (GHP) system provides a flexible way to efficiently heat and cool many different types of buildings. By using natural gas to power a YANMAR gas engine, YANMAR’s VRF system is able to reduce electrical costs by 90% and lower average operating costs by 30% over a standard electric system. By using world class Yanmar gas-engines to drive the system, these reversible air-source heat pumps can give low running costs, reduce CO₂ emissions and use very little electricity. GHP is a well-established technology and Yanmar has been one of the leaders in this field for the last 30 years. By offering Air-to-air (VRF) and Air-to-water GHP systems, Yanmar can provide efficient and cost effective solutions for a wide range of cooling and heating applications.

These systems are ideal in many applications where cooling and heating might be necessary at the same time in different areas of a building such as offices, schools, hospitals, labs and mixed use facilities.

The post Gas Heat Pumps Trumbull CT | St. Joseph’s High School appeared first on Controlled Air, Inc..

Throughout the hospital Controlled Air, Inc. provided the following work: Fire Dampers, Air registers and diffusers, Hot water VAVs and associated piping, Ductwork, as well as Johnson controls BMS and wiring.

The behavioral health unit in Sharon Hospital provides short-term psychiatric care of patients 55 and older. The unit provides acute care for short-term stays; admission may be a result of factors relating to the aging process. Others have been living much of their lives with psychiatric conditions, which can be exacerbated with age. Controlled Air, Inc. had to follow both typical hospital requirements, as well as for those of a psychiatric facility in order to follow code for this renovation.

Controlled Air, Inc. installed a Carrier roof top air handler , VAV boxes with hot water reheat coils, a steam to hot water heat exchanger off the steam boiler plant, hot water pumps, exhaust fans, hot water piping and insulation, ductwork and a controls system. Because of the psychiatric component all finishes within this unit had to be ligature resistant to protect the patents from self-harm. Our ligature resistant finishes included supply and return air diffusers, thermostats, radiator covers, exposed hardware was tamper proof and calking was specialty pick proof.

This project was also multi-phased and required performing the scope of work without interruption to the hospital. Proper coordination was critical to keep existing systems up and running to maintain air conditions to existing occupied spaces. Temporary cooling units supplied by Controlled Air, Inc. were used to maintain conditions in these spaces as required.

Low ceiling height was another challenge to work with. This wing of the hospital was circa 1960s and wasn’t designed for today high efficiency mechanicals with larger insulation and added controls systems, both HVAC and additional hospital controls. Ductwork was especially difficult to route through the existing structure and required careful coordination with all trades.

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