Client: Worcester Cathedral
Completed: January 2017
Oakland Business Line: HVAC Installation
Objective: Historic building heating, cooling and ventilation
Oakland Air Control, helping Worcester Cathedral’s Organ stay in tune!
The beautiful Cathedral in the centre of Worcester needed the technical help of Oakland Air Control Ltd to rectify a problem with temperature control in their Organ Loft. The loft and the main Cathedral must be maintained at close to the same temperature as one another, to ensure that the organ stays in tune. A previous installation (by others) was so badly designed and implemented that the solution had failed, so Oakland were called in the first instance to produce a report as to what had gone wrong, and what could be done to rectify the situation.
The main findings were:
Here is a picture showing how the previous installations return ductwork blocked the door, meaning that access to the unit for maintenance purposes could only be gained via a hatch in the roof!
Our works comprised the following:
Rear access was made via the existing wooden wall of the rear loft area so access to change the filters could be gained without entry by engineers into the sensitive and delicate Organ Pipe area. This unit would allow cooling down to 18°C with the ability to offset the sensor on the unit so cooling to 16°C would be possible.
We also re-routed the return ducting (previously going through the door) to the area above the door, thereby returning the use of the door for easy access to the new installation. All ducting in the plant area was insulated for efficiency and new supply ducting was fitted to take the conditioned air and deliver it evenly, at high and low levels thereby providing the most even temperature spread.
A new 4” Fan was supplied and fitted to bring outside fresh air into the return ductwork. This fresh air allows the organ loft to be slightly pressurised, pushing any dust laden air away from the organ loft and ensuring the cleanest of environments in the loft.
To complete the new installation, we supplied and fitted a new, intelligent Trend BMS Controller to accurately and reliably control the pipe area and loft to the same temperature as the Cathedral. This controller would be web enabled with on-board web pages so that with a simple Cat5 or 6 Business Network Connection set points can be viewed and changed by any PC running a web browser on the same network.
Graphs of sensors can also be viewed directly from the controller and in the event of a unit fault or a larger than expected temperature deviation an alarm email can be sent out to multiple recipients. To enable this, we extended the nearest Network point up into the Organ loft and terminated the cable into a network outlet box.
We ran a report using the output from the Trend sensors, monitoring the temperature differential between the Cathedral Interior and the Organ loft /pipe room over an 11-day period. The temperatures varied between 14°C and 18°C in the cathedral, and the new installation kept the temperature difference between the 2 areas to within a constant 1°C.
In a nutshell, another quality design and installation from Oakland Air Control!