Mechanical HVAC systems in heritage buildings can precisely control temperature and humidity to preserve collections, maximize energy efficiency, but require high initial costs, ongoing maintenance expenses, and careful planning to avoid noise issues and comply with heritage restrictions.

1. Advantages of using mechanical ventilation (HVAC)
in Heritage Building
~ Good indoor climate is guaranteed
A computer control HVAC system maintains 70° temperature/50%
humidity
+- （2%）

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

3. Three different forms of deterioration caused
by humidity:
~Dimensional Change
~Chemical Reaction
~Mold growth

4. ~ 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

5. Disadvantages of using mechanical ventilation
(HVAC) in Heritage Building
~ High initial cost of building and maintaining
the system. Cost effectiveness is hard to assess.

6. >Monthly operating expenses
>Preventive maintenance
>Repair
>Supplies

7. ~ Wrong planning of HVAC installation may
cause the system to make unwanted noise.
Heritage building was not design with AHU room, System Control room
etc
Therefore, a well planning is required to prevent noise produced by
rotating machinery and air moving devices.

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

9. Well planning is required for efficient ventilation