i need an expert to write -- 2

The project means that you should imagine a building (commercial or residential) and first of all introduce the hvac system that it already has, the building can be real existing or even not existing just imagination. After you introduced the current hvac system you (me) as an expert should say there are some elements that if they change, it would be more efficient and if we change the elements the cost would be $? And after changing these elements after how many years the cost of changing will return by being more efficient, like for example the usage of gas will decrease, and .... (make some reasons). As much as the power factor goes near one (1), it would be better. So try to make the power factor near to one (1). Just make sure all the things (codes, or ....) must be based on canadian rules and style. The elements are: Boiler Air handler Chiller There are types (CAV) and (VAV), you should prove CAV is not as efficient as VAV due to this and that and VAV is more efficient and better. It didn’t say how many words but it must not be less than 6 pages