HVAC equipment and controls are changing faster than the installed base. For a contractor, each trend brings a new skill to learn and a new thing that can go wrong at startup. This guide covers the trends that matter now, and what each means for installation and testing.
How each HVAC trend changes installation and testing
| Trend | What is changing | What it means for contractors |
|---|---|---|
| Smart controls and IoT | Connected sensors, trend logs and analytics | Sensor placement and calibration matter more, and cybersecurity becomes your concern |
| Heat pumps in commercial buildings | Electric heating replacing gas in many projects | New airflow, defrost and controls issues to commission |
| Variable refrigerant flow (VRF) | Zoned systems with many indoor units on one outdoor unit | Refrigerant piping, charge and per-zone airflow to verify |
| Energy recovery ventilators | Recovering heat and moisture from exhaust air | Balanced supply and exhaust airflow is essential |
| Indoor air quality | Higher-rated filtration, UV and monitoring | Fans must handle added pressure drop |
| Refrigerant transition | Lower global-warming-potential refrigerants | New safety rules, training and, for many, mildly flammable refrigerants |
| Green certifications | LEED, WELL and similar programs | Documentation of commissioning and testing |
The refrigerant change in more detail
In the United States, new residential and light commercial air conditioning equipment is moving to refrigerants with lower global warming potential, many of them in the mildly flammable A2L class. Handling, storage, charging and leak detection rules change with them. Follow the manufacturer’s instructions and current EPA rules, and check your state’s requirements, because they continue to develop.
Smart controls: promise and trap
A connected system can find faults faster than a person can. It can also make a wrong decision confidently if its sensors are wrong. Calibrate sensors at startup, document the sequence and give the owner trend data that is easy to read. See what facility managers should require from smart HVAC.
Green certifications and lifecycle thinking
Clients increasingly ask for LEED or WELL. Meeting them depends on documented commissioning, verified ventilation and energy performance. Look past installation too, and consider each component’s lifecycle, from production to disposal. For general contractors, specify TAB in the project plan from the start. A certified balance report is part of proving the system performs, and it is what the inspector asks for. See sustainable practices for general contractors.
Common mistakes
- Adopting a technology without training the crew. A VRF or heat pump startup needs its own procedure.
- Ignoring airflow with new equipment. New does not mean balanced.
- Leaving controls to the end. They decide how the system behaves.
Questions contractors ask about HVAC trends
Which trend should I invest in first?
The one your customers ask about. Today that is usually controls and the refrigerant transition, because they affect nearly every job.
Does new equipment still need testing and balancing?
Yes. Ducts, dampers and controls vary from job to job, so measured airflow is still the proof. See what TAB involves.
How do I keep up?
Manufacturer training, industry association meetings and the trade press. Pick one source and read it regularly.
Which trend to prepare for first
| If your customers are | Prepare first for |
|---|---|
| Owners of older commercial buildings | Controls upgrades, economizer repair and verified airflow |
| New construction and tenant fit-out | Heat pump and VRF startup, energy recovery and refrigerant rules |
| Healthcare and labs | Higher-rated filtration, pressure monitoring and tighter documentation |
| Owners seeking green certification | Commissioning records, measured outdoor air and energy metering |
Pick the row that matches your work, train one person well, and add the next trend when the first is routine.
Related reading: Trends in Sustainable Building Practices for Architects and Engineers.
To make sure new systems deliver design airflow, call Ghazi Hussain at (908) 323-9780 for a quote.
