Go to Flow Division > Autotest Home > Products > Test Cell / Engine Environment Control > CAHU (Combustion Air Handling Units) High Performance Combustion Air Handling Units Our Combustion Air Handling Units (CAHU pronounced Ka-Who) offer a range of system solutions that condition all aspects of the ambient intake air supply including pressure, temperature and humidity levels to conform to precise end-user specifications. Watch video about CAHU capability used in a test facility for World Touring Car, Le Mans and Formula 1. CAHU's generate conditioned engine intake air that is ideal for both emissions work and for standardizing the engine intake air conditions for mapping and optimization work. CAHU’s also improves test cell productivity by reducing test days lost due to adverse atmospheric conditions. The three versions that we manufacture can be sized to meet your facility needs. High-performance engine combustion air handling featuring close tolerance control of temperature, pressure, and humidity for steady-state and transient conditions.

High-performance engine combustion air handling featuring close tolerance control of temperature and humidity for steady-state and transient conditions. CAHU For Temperature Only High-performance engine combustion air handling featuring high tolerance control of temperature for steady-state and transient conditions. Summarize the problem but be specific enough that it can be recreated. BSD-110: HVAC in Multifamily Buildings Abstract:  Are multifamily buildings one building or a bunch of individual buildings sharing the same structure? Should services and systems be shared or individual? The passions regarding these questions are as strong as those separating Yankee fans and Red Sox fans. Rights: Building Science Digests are information articles intended for professionals. The author and the publisher of this article have used their best efforts to provide accurate and authoritative information in regard to the subject matter covered. The author and publisher make no warranty of any kind, expressed or implied, with regard to the information contained in this article.

The information presented in this article must be used with care by professionals who understand the implications of what they are doing. If professional advice or other expert assistance is required, the services of a competent professional shall be sought. The author and publisher shall not be liable in the event of incidental or consequential damages in connection with, or arising from, the use of the information contained within this Building Science Digestcover wall ac unit The heating, ventilation, and air conditioning (HVAC) system in an industrial building is like a giant version of a residential furnace and air-conditioner combination. air handling unit informationWhile there are significant similarities, there are also a few differences. what is air handling unit components

Size is the biggest one; industrial air-handling can take up a large portion of building space, and requires many large, high-powered fans to blow air into heating ducts. (These fans consume a large amount of the building’s total power). Typical air-handling units work in an "H". Outside air comes into the unit via one leg and stale air is vented from the other leg. The bridge of the "H" is where the new and used air is mixed to salvage some of the heat and humidity from the exhaust, which helps save money by warming and humidifying the incoming air. The mixed air is then heated or cooled, and it leaves the unit and supplies the building. Typically, 25 percent fresh air is mixed with the recirculated air. Units that use this process are sometimes called "economizers" as opposed to just regular "air-handling units." The IL Centre has six air-handling units. The first unit houses the enthalpy wheel, which feeds air to all of the other units. Each air-handling unit serves a specific zone of the building.

Each unit must provide a certain number of “air exchanges” per hour, and this number depends on the maximum number of people who will be using the space at any given time. The air-handling fans on the right are sending and receiving air from each of the colour-coded zones on the map. The white zones receive no air directly; air diffuses in through vents and doorways. (The sixth unit, which is not indicated on the maps, serves Goodwin Hall). Liberty Mutual is a leading provider of auto, home, and life insurance. The company is so committed to corporate responsibility, they only work with those who share their values. So when it came time to expand their world headquarters in downtown Boston, they looked to Cox Engineering. The coordination phase was critical. We were faced with a very aggressive timeline, and the entire project had to be CAD drawn and coordinated in a 3D model. The BIM process allowed us to discover inherent building issues early on, such as extensive structural steel joists.

Despite the many challenges and changes that occurred along the way, we brought the project in on schedule. Liberty Mutual trusted us to do the right thing, and we didn’t disappoint. Meditech provides innovative EHR solutions to care organizations. When the company needed a complete overhaul/retrofit of their existing chiller plant, they called on Cox Engineering. However, the job needed to be completed on a tight timeline, and the building had to remain operational during business hours. We spent many hours coming up with a suitable phasing plan- one that allowed us to work during the day without disrupting our clients, kept the data center online 24/7, and made sure critical systems remained functioning after hours. By every measure, the project was a success. There was no downtime to the data center, no loss of building heat or cooling during business hours, and no building complaints. Once again, we met our deadline without going over budget. Beth Israel Deaconess Medical Center (BIDMC) has called on Cox Engineering time and time again.

For their latest project, we were asked to rebuild a 55,000 CFM air handling unit that was more than 50 years old. To complicate matters, the aging system was located inside the hospital’s active neonatal intensive care unit. We only had a small 12-hour window on weekends to accomplish our work, and the NICU’s systems had to be back up and running every Sunday by 6 AM. While other HVAC providers said it couldn’t be done, we got busy coming up with a solution. The planning phase was critical. We devised a unique way to replace the system’s components piece by piece—dampers, coils, humidifier, fans, VFDs—without disrupting the newborns or the nursing staff. The project was highly successful. BIDMC now has a high-performance unit that will last another 50 years. We completed the job in just nine weekend shutdowns, right on budget and on schedule with no change orders. The New England Aquarium The New England Aquarium is one of Boston’s premier attractions.