Our Recent Projects

Learn About Our HVAC/R Work in NH and MA

Browse through our project descriptions and get a good idea of the depth and breadth of the commercial HVAC/R work we do here at Accurate Air. Preventative maintenance programs backed by 30+ years of experience are available. Call (603) 733-4119for more information and a free estimate.

HVAC Improvements for Cross Insurance

Cross Insurance purchased a 64,000-square-foot commercial class “A” office building in the summer of 2011. Upon occupancy, they found that throughout the building the temperature was extremely difficult to control and maintain, resulting in an uncomfortable working atmosphere.

The owners of Cross Insurance - being in a class of their own and caring deeply for the comfort and well-being of their employees, tenants, customers, and guests - requested the services of Accurate Air to investigate the HVAC system. After performing a thorough investigation, Accurate Air determined that the entire system had aged, that proper maintenance had been neglected for many years, and the system was in dire need of an overhaul.

Cross Insurance was determined to utilize the top-of-the-line equipment and materials available today to bring this building into the 21st century while increasing energy efficiencies.

Accurate Air contracted the services of WV Engineering Associates to work with us on developing a plan to upgrade the system and improve efficiencies. After many months of planning and developing, by the summer of 2012 the project was designed and we were to proceed with construction.

We determined we needed to develop a stringent plan because the building was occupied. Consequently, we put a plan together to utilize “swing” space construction and allow us to segment the building into phases by moving individuals from areas so we could perform our tasks. Also, the building had abnormally high ceilings, so most work was performed on scissor lifts provided by TJM Rental and Supply, Inc.

Task 1 - Take the old water-cooled chiller system offline and install a temporary chiller system until the new one arrived.

This job was performed during the hot summer months, and the deteriorating cooling tower was below ground level, in a confined space, located on the side of the building, adjacent to a very busy public roadway in downtown Manchester.

1. Accurate Air disconnected, drained, and prepared the tower for removal. The removal of such required the services of a 50-ton crane, contracted by the American Crane Company, as well as a police detail provided by The Manchester Police Department. 
2. Accurate Air rented a temporary air-cooled chiller from Carrier Rental Systems, hoisted in place by National Machinery Movers, and provided installation of such. Said services were performed on the weekend to provide the least amount of disruption to the employees, tenants, and customers of Cross Insurance.
3. The temporary chiller was up and running for the following Monday morning, thereby having no impact on Cross Insurance’s and its tenant’s ability to operate its services.

Task 2 - Demolish and remove the old boiler system, circa 1962.

1. Prior to demolishing and removing the old boiler system, we had to perform asbestos removal and abatement. Asbestos removal services were provided by Accolade Environmental Contracting Corporation and included asbestos testing and HEPA Boiler Tent Containment.
2. The old boiler plant was demolished and taken out in pieces.
3. The new Viessmann boiler plant was set in place in the mechanical room by National Machinery Movers and installed by Accurate Air in time for the heating season.

Task 3A - Remove the outdated pneumatic controls, VAV boxes, ductwork, and mechanical hot water piping, and install a new digital control system, VAV boxes, ductwork, mechanical hot water piping, and pipe/duct insulation.

1. Because the building was occupied, our foreman set up staging in one section and our crews completed that section, working second shift, and then removed and re-staged for the next section.
2. Due to time constraints, we enlisted the services of Granite State Plumbing and Heating for supplemental labor and Merchant Electric, LLC for electrical services. We also enlisted the services of Viking Controls to install the new DDC Johnson Control Package.
3. Peniel Environmental Solutions, 1032 Mason Road, Wilton, NH was contracted to perform asbestos testing on the core piping in the occupied areas throughout the building. No asbestos was found.

Task 3B - Replace the old water-cooled chiller system with a new air-cooled system.

1. The second part of task 3 happened simultaneously with the first part, so we enlisted the services of Allen D. Hendershot to build up the bunker where the old cooling tower was located.
2. We installed two new 130-ton remote condensers.
3. We demolished and removed all the hydronic piping and installed the new refrigeration piping to the two new remote condensers located in the newly raised bunker outside the building. Piping insulation was performed by KB Insul Tech, Inc.

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