Really Need some clarity ....... Do I have my fundamentals correct here?
Question: Which of the following HVAC systems offer simultaneous heating and cooling?
Answers:
1) DX or Unitary System - YES, since each system controls only one zone or room
2) Single Duct, Constant volume system Single Zone - NO, since there is only one duct controlling each zone.
3) Single Duct, Constant volume system with Reheat - YES, since each zone has a reheat coil to control the air temperature.
4) Variable air volume (VAV) systems - NO, since temp and humidity are at a constant.
5) Dual Duct high velocity - YES since there are two ducts and each zone has a mixing box to control the air temperature.
6) Multi-zone System - YES, since there are two ducts and the air is mixed in the AHU before being transported to each zone.
7) All Water System - Hydronic System - YES, BUT true only for a 4 pipe systems as there are two supply pipes and it uses a fan coil in each zone/room to control the air temperature.
8) Air water system - YES. I don't know why
9) Air water Induction system - YES. I don't know why
10) Fan coil unit with supplementary air - YES. since there are two supply pipes and it uses a fan coil in each zone/room to control the air temperature.
11) Electric Systems - ?? I don't know.
Comments much appreciated!!
Thanks