To determine what size HVAC unit is needed to properly handle the heating and air conditioning needs of a building, you need to perform heat load calculations. Some of the items that go into the equation include:
- Outside air temperatures
- Solar exposure of the building
- Building construction and insulation
- Size of exterior walls facing each direction
- Number and size of windows and doors on each wall
- Internal heat load from equipment
- Internal heat load from people
- Ventilation and infiltration
It is important to have the heat and air conditioning load calculations performed by a certified engineer.
Regarding air conditioning, many times people think bigger is better and nothing could be further from the truth. If a unit is oversized for the space it is conditioning, the air conditioned space will have a cold clammy feeling rather than the cool dry
sensation. This is a result of the unit dumping in cold air and then satisfying the thermostat before the air can be properly dehumidified. This short cycling of the unit will shorten the life of the equipment, increase overall cost and in the end
you will not be satisfied with the indoor air comfort.
Always make sure you have an experienced, licensed HVAC service company maintaining your equipment to keep it running at peak efficiency. Chauffeur service in Sheffield