How significant is non-operating cost in the TCO of an HVAC system? Cost of ownership, or the lifetime cost of HVAC equipment is usually the total of purchase price and operating cost. However, ABB Drives argues that the costs of an HVAC system that is not running due to failure are also […]
Benefits of override mode for VSDs in buildings Override mode is a function that helps engineers designing escape routes in the event of building fires. It also allows emergency services to easily trigger these essential functions to aid in the evacuation of residents or whilst fighting fires. Large buildings and other […]
For 2017, ABB has updated its checklist for building services consultants. When specifying VSDs, ABB Drives urges consultants to review their requirements and ensure the selected drives meet them. According to ABB, initial purchasing represents only about 20% of total cost of ownership of an HVAC system the balance being the operating and running […]
When modernising a city centre underground car park’s ventilation system, the owner wanted to improve air quality and improve efficiency to reduce energy costs. To achieve this, the new system needed to provide a dynamic response to actual vehicle movements. The fume extraction ventilation system consisted two centrifugal extraction fans located in a common […]
One answer will be when they fail, but at that stage the pressure is on. Do you repair the one that has failed, assuming we know why is has failed; can you get the parts, and how long will it take? If you decide to replace it, will you choose the product best suited to […]