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..

HEAVY DUTY INDUSTRIAL POWER GENERATORS

For industrial use, their HEAVY DUTY INDUSTRIAL power generators are designed to supply power for multiple heavy-duty equipment types at the same time. This means production and operations won’t be interrupted when the power suddenly goes out.

With an increasing number of extreme weather events, combined with the outdated, problematic power grid in the U.S., UL2200 certified HIPOWER SYSTEMS’ backup generators are the perfect choice.

If your business relies heavily on electricity, whether you have equipment running round-the-clock or you have daily production processes that require heavy use of electrical power, it’s important to have a backup power supply. For these purposes, we recommend our UL 2200 certified Heavy-Duty Industrial Diesel Standby generator series.

HIPOWER backup power generators are built to suit each client’s specific power generation needs.

HS STATIONARY product line is versatile, adaptable and, an affordable optional standby diesel generator, which was designed for light commercial power needs in mind.

As regulations tighten, gas generators are becoming an environmental and economic requisite for many companies. Our HNI product line leads the field in reliability, performance and durability. Our wide assortment of generator and enclosure features and options enables these models to meet every possible application and need..

Key Features of our Backup Generators

HIPOWER IS NOW CERTIFIED WITH THE 2021 INTERNATIONAL BUILDING CODE (IBC) – SEISMIC CERTIFICATION

The International Building Code (IBC) requires that critical systems and components must not only maintain structural integrity during an earthquake, but also remain operational and continue to carry out their primary functions (per 2015 IBC Chapter 17). To ensure the highest quality in the HEAVY DUTY INDUSTRIAL (HDI) product line up to HDI-600, HIPOWER SYSTEMS used for its seismic certification, an independent Earthquake Simulator Laboratory – The Pacific Earthquake Engineering Research Center (PEER) Lab at the University of California in the city of Berkeley, CA.

FLYER/SPEC DOWNLOADS

HDI 60-2000 BROCHURE

EHR BROCHURE

HNI 80-150 SPARK IGNITED

The post HIPOWER Stand-by Generators appeared first on Controlled Air, Inc..

“DESIGN AND BUILDING COMPLICATIONS
The New England Air Museum had not been air conditioned until it underwent a massive re-model which replaced the current heating system and added air conditioning to the buildings. Originally, the heating and air conditioning was designed for ground mounted
units with duct work, since the metal buildings could not support rooftop units. However, because of the nature of the metal buildings, even the ductwork posed problems with the structural integrity and the museum did not want duck work to interfere with aircraft display. Controlled Air, Inc. worked with Johnson Air-Rotation HVAC Systems to provide an alternative that would require no ductwork or extra structural support. It was very important that the systems were quiet due to the many visitors at the museum, so the engineers designed the systems to keep the sound levels as low as possible. The museum was very pleased with the sound levels of the Air-Rotation Systems and the incredibly small degree variation from all three buildings.”

Download the Case Study

The post New England Air Museum Building Design Complications appeared first on Controlled Air, Inc..

Staff
It is important to make sure that staff does not manually override any of the settingsand that they are trained in reading any errors within the system so that they can react properly.

Monitoring & Evaluation
Another very important part of building controls is evaluation. Once a system is set-up it should be monitored to determine if the building is operating as efficiently as expected. Building controls systems are not a “set it and forget it” system. You may have expectations that a building will need a certain amount of heating or cooling, but it may actually need more or less.

Maintenance
The building controls system, as well as the equipment connected to it, need proper maintenance. Like all things mechanical,building controls systems require maintenance so that they perform at top efficiency. Maintenance includes calibrating sensors, checking valve actuators, damper actuators and backup information. It is important to make sure all equipment and systems are updated and have the proper service and maintenance.

Improper Set-up
All equipment should be connected to the building controls system. If not, improperly functioning equipment may go unnoticed. This could lead to a decrease in the equipment’s efficiency or a breakdown of the equipment. The building controls system helps to identify smaller issues occurring in the equipment thereby decreasing larger ones. Having more items visible to the building controls system, such as lighting and HVAC has many benefits. Lighting levels within a building can make a very large impact on the energy use and the air conditioning load.

Need Updated Equipment
We often install Facility Explorer supervisory controllers that provide integrated control, supervision and network management services to one or more local networks of field controllers. These controllers also provide system-wide coordination to automate building control operations. All Facility Explorer supervisory controllers provide modular and scalable supervision and control for your building automation system. You choose only those hardware and software features that are applicable to your project requirements. One feature includes the ability to visually see how systems are functioning.

Make sure you are getting the most out of your building management system by using it to its fullest capabilities. The small investment in training, monitoring and maintenance will provide a true cost savings to your company.

The post Efficient Building Controls appeared first on Controlled Air, Inc..

However, funding will not exceed the equivalent of $450 per kilowatt of nameplate rated capacity. Financial support is intended to help you achieve a fair and reasonable payback and return on investment during the life of the project compared to purchasing the equivalent amount of power, fuel oil and/or gas from your utility. If you are interesting in installing cogeneration, this funding will offer incentives that will help pay for the installation.

The post CEFIA Releases RFP for Cogeneration (CHP) Pilot Program appeared first on Controlled Air, Inc..

Traditional heating and cooling systems often run at a higher speed then necessary which wastes considerable energy. Also frequent starting and stopping of motors and quick accelerations can lead to short life spans for equipment. VFD’s allows for gradual acceleration and less wear and tear on equipment. They work by alternating applied voltage by converting the fixed-frequency supply voltage to a continuously variable frequency, thereby allowing for adjustable motor speed. With variable frequency drives, motors can run at pre-determined speeds to optimize system requirements and energy efficiency performance on fans and pumps. Annual chiller energy consumption and carbon dioxide emissions can be reduced by as much as 30% since lower compressor speed causes reduced wear.   Systems can also be programmed to run at times that take advantage of off-peak energy rates.

VFD’s are programmable, quiet, have high motor efficiency and smooth performance. They come in a range of Horsepower and supply voltages. VFD’s are most effective when they are the ideal size and voltage for a specific motor. Digital displays and keypads make programming a breeze and the display can also monitor and show diagnostic information.  Many models offer a remote display when the VFD is mounted interior of the equipment, as with many Rooftop air conditioners.

VFD can have an ROI of one year in the right application. They also are available for rebates and incentives the Connecticut and the local utilities. Incentives include the Energy Efficiency Fund Small Business Energy Advantage Program through the UI for a 0% interest rate for amounts between $500 – 100,000; as well as Energy Efficiency Fund Commercial and Industrial Energy Efficiency Program for varying Incentives that incorporate two electric end-uses with at least 15% of project energy savings.

Controlled Air, Inc. uses Eaton Variable Frequency Drives under the Johnson Controls label and we can   provide a 3-year warranty when one of our trained techs start and test them. Often ABB VFD’s are used because they are better known. We feel that the Eaton VFD’s offer a competitive solution in cost, quality, easy of operation, support, and warranty.

The post Variable Frequnecy Drives (VFD) appeared first on Controlled Air, Inc..

1. Cleaning and filling cooling towers
2. Turning on chillers
3. Changing filters & belts
4. Greasing bearings
5. checking all electrical systems
6. Checking refrigerant levels
7. Basic operational check
8. Checking pump and fan motors
9. Punching the tubes in water cooled condensers (we really don’t punch the tubes, it is a process of using a brush to clean copper tubes)

The post Spring Maintenance appeared first on Controlled Air, Inc..

Dehumidification is very important in a poolroom to prevent structural damage.
Exhaust fans are not enough to balance the humidity in the room and can also lead to escaping heat. In order to compensate for the escaping heat, the room and pool temperature will have to be set warmer, leading to higher electric bills and pool water evaporation. This is especially so in the winter. The initial cost of using exhaust fans rather then a dehumidification system is cheaper, but the long-term costs are higher.

A heat recovery system can be used in conjunction with exhaust fans and dehumidification systems for greater energy efficiency. The heated or cooled exhaust air, depending on the season, passes through either a heat wheel or air to air exchanger to temper the outdoor intake air. This pre-treats the incoming air, decreasing the total heating and cooling load.

Humidity is particularly an issue on the east coast. The fresh air from the ventilation will also be very humid. Therefore the humidity of the room will never reach an optimum level. Traditionally a poolroom should be kept at 50-60% relative humidity. Mid-summer in CT have humidity levels ranging from 60%-80% with 60% on the best of days.

Not only is having a dehumidification system important but the size of the system is equally significant. Factors such as the size of the room, water temperatures, and room occupancy, are all critical factors in the size of the system required. Too small of a system and there can be deterioration to structure in the poolroom and too large a system and there is extra costs that are not necessary.

Ductwork design and installation is also imperative to correct pool room integrity. Improper ductwork leads to less efficiency, reduced airflow, higher energy use, chemical evaporation and incorrect humidity. A poorly designed and installed duct system can restrict airflow. This restriction must be compensated for to maintain the comfort capabilities within the space. The restriction causes the compressor to operate at a reduced output capacity and lower efficiency. The distribution of the ductwork is important because it affects surface water evaporation; increased air velocity across the surface of the pool water will create greater evaporation, thereby increasing chemical and water cost.

Along with the dehumidification system a heating source is required. It is never a good idea to heat the poolroom with the heat from the pool. In order to reach the proper temperature in the room the pool will need to be kept at a higher temperature and will create greater evaporation, thereby increasing chemical and water cost.
The higher humidity and wet warm air leads to increased loads on the dehumidification system, higher operating costs, building damage, rust, corrosion, mold and mildew.

The equipment must also be located in an ideal space. An expensive dehumidification system will last longer and more efficiently if it is placed in a room away from the chemical and moisture of the pool and where it can get easily accessed for maintenance and service.

The type of building materials used will not compensate for the high humidity in the room. Warm air with Chlorine will eventually eat away, rust, or rot any material with time. It is important to have the appropriate equipment and design within the space. With a proper dehumidification system, ductwork, and heating/cooling you can achieve energy efficiency, structural stability, lower electric bills, and better overall air quality. If the above-mentioned items were not considered in the initial building, it is important to address them immediately. There is a higher cost in retrofitting the system to address these issues, but it will save energy and long-term costs.

Whether performing a retrofit or new building it is important to get an experienced and knowledgeable engineer to design the space, calculate energy usage, possible energy savings, cost and to determine the right equipment. Good engineering is about more then just designing equipment to work in the space. It is about making the best calculations to use the least amount of materials and have the best outcome. Getting the right sized equipment takes fine-tuned engineering and finite calculations. Each poolroom is its own unique space and must be evaluated as such. What works in one space, may not work in another. A properly designed retrofit will always save on energy costs after installation. It is possible for older facilities to have a savings of up to 50% on energy bills. Newer facilities with the best engineering can get the highest energy efficiency possible at the lowest cost with the longest structural integrity.

Furthermore engineering requires good communication with the installers. When everyone is involved with the process there is less room for error and better communication, which leads to a smooth installation process and the better quality.

To get the best quality, energy efficiency, and experience contact the Controlled Air, Inc. team. Our in house team of engineers and installation technicians will work together to provide a quality installation. We keep your pocketbook in mind while giving you the highest in energy efficiency.

The post Indoor Swimming Pool Indoor Air Quality appeared first on Controlled Air, Inc..

 Part 1: General

1.01  This section sets forth the minimum requirements for HVAC WATER TREATMENT used on University building renovations or new construction.

1.02 This section includes water-treatment systems for the following:

•  Heating, hot water piping (closed-loop system).
• Chilled-water piping (closed- loop system).
• Heating, steam and condensate piping).
• Condenser water piping (open system).

Part 2: Design Guidelines

2.01 CHEMICAL FEED DESCRIPTION

A. Closed-Loop System: One bypass feeder on each system with (5 gallon size on all systems with> 1,000 gallon volume) isolating and drain valves at circulating pumps, unless otherwise indicated.

B. Closed- Loop Heating Steam and Condensate Piping: Lead-lag switch controls the sequence of boilers and introduces the chemical to the boiler through an appropriate chemical feed system.

C. Open- Loop Condenser Water Piping: Chemical feed and bleed control systems with integrated inhibitor and dual biocide feed

2.02 PERFORMANCE REQUIREMENTS

The water treatment program includes boiler systems, cooling towers, hot water loops, and chilled water loops. The contractor will provide all chemical products (currently consisting of oxygen scavenger, scale inhibitor, organic dispersant, alkalinity adjustment, condensate treatment, fuel oil treatment, combination scale/corrosion inhibitor with dispersants, non-oxidizing Biocide A&B closed water treatment, and lay-up treatment as required), along with equipment, and professional consulting services to accomplish the following:

1. Produce clean heat transfer surfaces which are substantially free of scale, sludge, deposits, corrosion, pitting and biological growth when treatment is administered in accordance with vendors directions and recommendations.

1. Reduce fuel and electrical consumption through improved heat transfer efficiency; by minimizing scale, corrosion, fouling and microbiological growth which create deposits on heat transfer surfaces.

1. Minimize repair and maintenance costs associated with replacement and cleaning of equipment due to scale, corrosion, fouling or microbiological activity.

1. Provide professional, knowledgeable and involved sales/service personnel to ensure program success.

1. Accurately monitor program results and communicate appropriate recommendations with quantifiable business oriented justifications.

1. Provide Training to University personnel on the implementation and control of the program.

2.03 SUBMITTALS

A. Product Data: Include rated capacities; water-pressure drops; shipping, installed, and operating weights; and furnished products listed below:

• Pumps
• Chemical feed and bleed control systems with integrated inhibitor and dual biocide feed tank.
• Chemical bypass feeders
• Chemical water treatment program and MSDS
• Test equipment
• Filters

2.04 QUALITY ASSURANCE

Installer Qualifications: Provide an experienced installer who is directed by an authorized representative of the chemical treatment supplier for both installation and maintenance of chemical treatment equipment.

3.01 PRODUCTS

A.MANUFACTURERS

Manufacturers: Subject to compliance with requirements and in conjunction with the existing contracted University HVAC Water Treatment Program, provide products by the current Chemical Treatment Vendor for the University:

Contact Facilities Operation to obtain the current contracted Vendor.

Every effort must be made to maintain a level of uniformity in chemical formulation to insure a line of continuity. Deviation from existing formulations that are applied across the University shall be avoided. Provisions should be made for the removal for any unused chemicals. In addition, provisions must be provided for the proper disposal of all empty containers.

B. CHEMICAL TREATMENT TEST EQUIPMENT

• Test Kit: Furnish all necessary manufacturer recommended equipment and chemicals for testing and controlling the water treatment. Provide a program for testing pH, bio-count, chloride, alkalinity, total hardness, and inhibitor.
• Corrosion Test Coupon Assembly: Constructed of corrosion resistant material, complete with piping, valves, mild steel and copper coupons. Insure 6 gpm flow across the coupons. Locate copper coupon downstream from mild steel coupon in the test coupon assembly. Analysis of the coupons each 90 days will be performed at no additional cost to the University.

C. CHEMICALS

Furnish chemicals recommended by water treatment system manufacturer that are compatible with piping system components and connected equipment.

• System Cleaner: Liquid compounds with emulsifying agents and detergents to remove grease and petroleum products. The formulation must be compatible with the system components.
• Biocides: Two alternate non-oxidizing micro-biocides with different kill mechanisms.
• Closed- Loop, Water piping Chemicals: Contain sequestering agents to reduce deposits, chemicals to adjust pH, and corrosion inhibitors to protect system metals.
• Heating Steam and Condensate Piping Chemicals: Liquid formulations to prevent deposits, adjust pH and alkalinity, scavenge oxygen, and protect condensate system components.
• Open-Loop, Condenser Water Piping Chemicals: Deposit dispersants and penetrants to inhibit scaling, corrosion inhibitors, and micro-biocides.

3.02 EXECUTION

A. WATER ANALYSIS

Perform an analysis of supply water to determine the type and quantities of chemical treatment needed to protect from corrosion, deposition, and fouling.

B. Installation

Install treatment equipment level and plumb.

Perform chemical cleaning as recommended by the water treatment supplier. The water treatment supplier must test and certify in writing that the systems are clean and free of organic and inorganic contaminants.

3.03 FIELD QUALITY CONTROL

Engage a water treatment service representative to perform startup service.

Inspect field- assembled components and equipment installation, including piping and electrical connections. Report results in writing.

Inspect piping and equipment to determine that systems and equipment have been

thoroughly chemically cleaned, rinsed, and filled with water, and are fully operational before introducing chemicals for water treatment system.

Place HVAC water treatment system into operation and calibrate controls during the preliminary phase of HVAC systems startup procedures.

Test chemical feed piping as follows:

• Do not enclose, cover, or put piping into operation until it is tested and satisfactory test results are achieved.

• Test for leaks and defects. If testing is performed in segments, submit separate report for each test, complete with diagram of portion of piping tested.

• Leave uncovered and unconcealed new, altered, extended, and replaced water piping until it has been tested and approved. Expose work that has been covered or concealed before it has been tested and approved.

• Cap and subject piping to static water pressure of 50 psig above operating pressure, without exceeding pressure rating of piping system materials. Isolate test source and allow test pressure to stand for foul’ hours. Leaks and loss in test pressure constitute defects.

• Repair leaks and defects with new materials and retest piping until satisfactory results are obtained.

• Prepare test reports, including require corrective action.

3.04 DEMONSTRATION

A. Engage a qualified water treatment service representative to train owner’s maintenance personnel to adjust, operate, and maintain HVAC water treatment systems and equipment.

B. Furnish a one-year service program by a qualified service person, performing service on a full-time basis. Service calls will be scheduled on a twice a month schedule coordinate with the University as to the day of the month that service will be performed. Upon arriving on campus, the service person will contact the University representative. Upon completion of the service call, a copy of the service report shall be given to the University’s representative. Response to emergency service calls shall be less than 24 hours. The University shall make the equipment available/ accessible to the service person so as not to cause delays.

C. Train Owner’s maintenance personnel on procedures and schedules for starting and stopping troubleshooting, servicing, and maintaining equipment and schedules.

D. Review manufacturer’s safety date sheets for handling or chemicals.

E. Schedule at least 8 hours of training with Owner with at least seven days’ advance notice.

The post Section 15189 – HVAC appeared first on Controlled Air, Inc..

I have been asked many times over the years, why do I want to spend the extra money on ductwork? It only is hidden by the drop ceiling and as long as the system cools when I lower the thermostat and heats when I raise the thermostat, what else matters. Well, that poorly designed and installed duct system is costing you money every day!

The poorly designed and installed system restricts the air flow to the HVAC unit. This restriction must be compensated for to maintain the comfort capabilities within the space. The compressor now operates at a less efficient point with this reduced air flow caused by the restriction. This causes the compressor to operate at a reduced output capacity and at a less efficient point using more watts per btu than at optimum design. It now has to run longer to achieve the same amount of cooling using even more energy.

Well, we can compensate by increasing the airflow. This increase requires more energy to move the air, trying to compensate for the restriction. In most HVAC systems the fan cost more to operate then the cooling compressor itself. This fan energy can be appreciable, especially when the fan operates for cooling, heating and ventilation purposes running well over 3000 hrs per year. For the same reasons, poorly sealed and insulated ductwork also contributes to additional operating cost.

Faced again with this question about the added cost for the duct system, I now used the Building Energy Modeling Software to substantiate my hypothesis. I entered both a poorly designed and leaking duct distribution system and an efficiently designed tight fitting duct distribution system and compared the energy cost on identical building and equipment. The efficient system paid for itself in about three years. To me that’s a pretty good return on your investment.

The post The Importance of Duct Work appeared first on Controlled Air, Inc..