(845) 265-2828
2421 Route 52, Hopewell Junction, NY 12533

Professional Services

Our HVAC TAB experience and our specialty certifications find application in many important areas. Below are a few TAB service examples Including mission critical Health Care and Laboratory environments.

New Construction

Pre-Construction Surveys – to provide owners and engineers with the current operating conditions needed to ensure an efficient and economical design

Testing and Balancing of new system Air and Water systems

Duct leakage testing of commercial systems

Residential Buildings

Blower Door Test (Building Envelope)

Duct leakage testing


Survey and Balance:

Yearly surveys of air exchange rates, room pressures and fan performance.

Rebalance existing systems to meet ventilation requirements.

Report on systems to meet regulatory requirements.


Survey and troubleshoot existing Air and Water systems:

Low Air or Water Flow Issues

Building Pressurization Issues

Commercial Kitchen Pressure Problems

Fume Hood Testing in Laboratories and Schools

Comfort Balance

Ultra-Sonic Water Flow Testing

Pipe Thickness Testing

Fire Damper Testing

Medical and Health Care Facilities

JCAHO standards specify air quality and individual room pressures critical to patient and staff safety. dL Flow Tech has deep knowledge and certification in medical and healthcare facilities that is available to clients needing to establish and maintain successful JCAHO certification.

Always important, but especially so in instances when dealing with viral contagions. The Joint Commission regularly updates the requirements for JCAHO Certification, so in a real sense, compliance is a moving target. With this situation comes the need for ongoing attention by building managers and owners. Our certified technicians are available to support all your TAB needs.

An effective approach to managing these situations is to schedule a full building HVAC assessment with needed remediation, followed by quarterly or twice-annually inspections and service. If available, current control technology will notify support staff of any non-conforming system changes requiring attention, often before the building’s occupants become aware of them.

HVAC Service Contracts

Without ongoing oversight, a building’s mechanical equipment will wear, sensors fail, and control systems degrade and become functionally obsolete. Inoperable fire dampers are of special concern because a closed damper will redirect air flow in an untended way. It is common for leaks in duct work to develop, reducing efficiency.

Additionally, over time personnel changes in numbers and placement, equipment movement, space reallocation and re-purposing, will exacerbate the consequences of mechanical system degradation. Building codes such as air quality and energy efficiency standards change over time. Factored together, comfort complaints, possible safety issues, and regulatory non-compliance become near certainties.

New Construction

Pre-Construction testing allows the engineer and contractors to account for what is happening in the system prior to changes being made. It allows for understanding of how the new work will affect the rest of the building and surrounding occupants. This service provides a baseline of reference for the design and installation team for critical decision making. 

New Construction: dL Flow Tech’s service focus for 38 years has been HVAC Testing and Balancing. This is the foundation procedure for testing and certifying every newly installed HVAC system. The procedure requires specialized state-of-the art instruments used to adjust and document temperatures, pressures, rotational speed, electrical characteristics, velocities, and air and water quantities. The measured results assure the designer, installer, engineers, and customer that the HVAC systems are set to specifications and operate as intended. The TAB process comes at the end of construction where project schedules are often the most challenging.

We are team-oriented project managers, who work with all trades to complete the project to schedule, while never sacrificing work quality. A NEBB Conformance Warranty is available Upon re-quest.


Restaurants demand a lot from their HVAC systems. Air quality is vital in dining areas where room temperature control, drafts and system noise can make or break customers’ dining experience. Employees may view uncontrolled cooking fumes, heat, and humidity in the food preparation area as a toxic work environment. Flame suppression over cooking areas must be in place and verified ready. Refrigeration temperatures settings a critical to food storage requirements.

A code compliance nightmare for the restaurant owner. We work with restaurants to maintain their HVAC systems where they should be, we do this well.


Multi-unit residencies such as senior residences, dormitories, apartment buildings and hotels, can be a special challenge. Each unit is controlled to individual comfort needs, but at the same time integrated into a larger system. Common issues are degrading system efficiency, energy loss, air quality, and humidity levels. Noise in mechanical systems are especially unwelcome.

Expect more to be asked of multi-residence HVAC systems as more is learned about the need to control viral contagions in close quarters and public spaces. Whatever the issue, energy efficiency, energy loss, resident’s personal comfort, or energy code compliance, it’s a good fit to our capability.


The risk of exposure to unsafe concentrations of air-borne chemicals in laboratories can range from negligible to extreme, depending on the activities conducted in the laboratories, the types of hazardous chemicals, the quantities of materials, the characteristics of generation, the duration of exposure, and the protection.

Mitigating the risk to people requires proper design, operation, and utilization of the laboratory; exposure control devices such as fume hoods and the laboratory ventilation systems. Standards for laboratory environments are set by ASHRAE, The American Society of Heating, Refrigerating and Air-Conditioning Engineers, jointly with chemical and engineering professional societies.

This is another area where dL Flow Tech has certified employees with the knowledge, skills and instrumentation needed to support clients needing to maintain their building’s certification status.