Advantages of using mechanical ventilation (HVAC) in Heritage Building

~ Good indoor climate is guaranteedA computer control HVAC system maintains 70° temperature/50% humidity

+- （ 2%）

Type of Object %RH Degrees in Farenheit

Furniture

45 - 55% 68 - 72°Paintings and Paper

Textiles

Objects

Ideal RH levels and temperature condition for the musuem’s collection

Three different forms of deterioration caused by humidity:~Dimensional Change

~Chemical Reaction

~Mold growth

~ Mechanical ventilation with heat recovery maximum energy efficiency of building can be achieved

2014 Visitor Numbers set at Canterbury Museum ~684 000 / 365 = 1873 one day

Disadvantages of using mechanical ventilation (HVAC) in Heritage Building

~ High initial cost of building and maintaining the system. Cost effectiveness is hard to assess.

>Monthly operating expenses

>Preventive maintenance

>Repair

>Supplies

~ Wrong planning of HVAC installation may cause the system to make unwanted noise.

Heritage building was not design with AHU room, System Control room etcTherefore, a well planning is required to prevent noise produced by rotating machinery and air moving devices.

~ Complicated to retrofit into historically valuable building while complying with heritage restrictions.

Well planning is required for efficient ventilation