Specialized works: CCTV (closed-circuit TV) Access Control and A. C. (Air conditioning)
Any construction company considers work as specialized when it requires expertise on a particular construction technique or product. In most cases, the manufacturer’s warranty for the technique or product is conditional based on all work done by a person who has completed the manufacturer’s ‘must take’ training program.
CCTV (closed-circuit TV) systems
A CCTV is a video monitoring system that consists of circuits that are all closed, and all elements are directly connected.
These systems use strategically placed video cameras which are connected to a digital video recorder or a private network of monitors, where they capture footage and feed to. Footage can either be saved for future reference or be used for real time viewing.
CCTV technology is used for a variety of purposes, including, business and retail surveillance, overseeing hazardous locations such as construction sites and industrial environments, monitoring enclosed spaces such as lifts, providing a visual record in places where it is necessary to maintain security such as airports or banks, home and grounds security, as well as monitoring public places.
CCTV installation is considered specialized work where a contractor has to be authorized by the manufacturer or have some type of proof that they are qualified to do the job. No company or organization would want to have security cameras that are malfunctioning because of the way they were installed.
Access control
This is a security technique that is implemented in a computing environment. It is a fundamental concept in security that minimizes risk to a business or organization. There are three basic types of access control;
Discretionary Access Control (DAC)- The owner decides people who will make way to a premise or unit
Mandatory Access Control (MAC) — This typically classifies all users and entities and provides a label which permits them to pass through a security and gain entry.
Role-Based Access Control Technology (RBAC) — Also known as Non-Discretionary Access Control, it is popular among households and businesses. The access provided is rigidly based on a subject’s role in the organization. Most employees receive access based on the limitations of their job responsibilities.
A.C (air conditioning)
In the most general sense, air conditioning can refer to any form of technology that modifies the condition of air. It is a process that improves the comfort of occupants in interior spaces. It can be used in both domestic and commercial environments. Air conditioning can also be used to cool/dehumidify rooms filled with heat producing electronic devices such as computer servers, power amplifiers and even to display and sometimes store some delicate products such as artwork or processed manufacturing material.
When it comes to installation, commercial air conditioning systems are installed totally differently from residential ones.
There are different types of commercial air conditioning systems. The main types are; single split system, multi-split system and VRF or VRV system.
Single splits are one of the most affordable air conditioning system and are suitable for small commercial buildings. They can provide heating and cooling in individual rooms or can be combined to serve larger spaces or multiple rooms. The only downside is that you need enough external space to have one outdoor unit for every indoor unit. Multi-splits work the same way as single splits. The only difference is you can connect to ten indoor units to one outdoor unit. They are highly preferable for restaurants, offices, shops, etc.
It is always great to have fewer outdoor units, especially if you lack space or you want to preserve your buildings external appearance. However, multi-split systems are more complex and require more pipe work than several single splits.
VRF or VRV air conditioning, where VRF means variable refrigerant flow and VRV means variable refrigerant volume. Both terms mean exactly the same. The term VRV was protected by the initial technology developer, that’s why everyone calls it the VRF.
This system is the best solution for medium to large commercial buildings, including hotels, offices, mixed-use buildings and retail spaces. They are extremely efficient, easy to control, and they also come with reduced installation times, minimizing disruptions.
There are two types of VRF/VRV system, heat recovery and heat pump. Heat recovery VRF/VRV systems have a capability of providing simultaneous heating and cooling to two different areas at the same time. They are the most efficient commercial air conditioning systems since they recover waste heat from around the building, using it to heat other rooms and hot water.
Heat pump VRF/VRV systems on the other hand cannot provide both heating and cooling at the same time but they can provide either or at any given time.
