The ever changing HVAC system skillfully increases energy efficiency and supports building health. The introduction of wall caps and vents is considered as one of the best cases at this point of time. They offer superior protection to the rainscreen of a building. The vents developed for rainscreen are known for their lifelong durability but some pieces of equipment walk in and suddenly go out of trend. Induction HVAC falls under this category.
There was a time when air controlled induction units were mainly used in large buildings. They became famous because of their capacity to work more efficiently than the fan based systems available at that point of time. Moreover they needed less ductwork and most units that fall under this category were well-kept and functioned for years. But many of these systems are gradually going out of style. It is indeed difficult to decide whether you should replace your old system with the new retrofit induction units or you should repair the entire HVAC system of your building.
An introduction to HVAC induction
An induction system is made of a vast central air handler that transfers air to the small sized terminal units. The nozzle vents are important components that separate the induction units from other systems. The primary air makes a venturi effect vacuum through various series of air vent nozzles that further brings the secondary air out of the room. The secondary air that flows through the central air gets back into the room. The coils especially the water coils maintain room temperature. Induction units have the capacity to fulfill both heating and cooling needs, although they work more efficiently when used for cooling.
Facility managers often recommend to replace the induction system because the high speed of the air passing through the induction makes the terminal units noisy. Additionally, some buildings may also face some issues with static air pressure whereas some encounter moisture related problems. General wearing and tearing can also make the facility managers look for some alternatives.
The best options for replacements
- When it comes to replacing your old induction unit, various systems are available. The engineers can swap the fan and coil system for which they need to install new ductwork. However, finding an appropriate space for the extra ductwork is no less than a challenge if the induction unit pair off with the original building design.
- Another suitable option for induction replacement is a ductless split system. It covers both smaller indoor units and huge outdoor units. The design and function of a ductless split system may attract occupants for having similarities with the induction system. One of the minus points of the energy efficient system is that it does not replace air with a split system. So while getting it, ventilation needs to be taken into account.
- The best and most reliable option here is to replace the old induction with a new and updated one. This method is recommended by the majority of facility managers. Due to the constant advancement in the technological field, today there are more upgraded systems available with almost more than 30% improvement in energy efficiency.
Today’s modern induction systems are more energy efficient and smoother than the decade old manufactured induction system. Two alternating induction systems are mentioned below.
- Variable air volume
This particular induction system sends different volumes that prohibit the cold water from entering into the room.
- Chilled beam system
It is made of a finned tube heat exchanger. The chilled beam system is mainly of two types- active and passive. The active beam system acts like the old induction systems because it supplies primary air through the central air handler.
Recently there’s a surge of interest in chilled beam and induction systems, which is partially because of the need to replace aging induction systems. Whichever system your customer chooses, by upgrading their HVAC they will enjoy the benefits of the industry’s continual quest for improvement.