Mechanical/Pump Room Question.
Mechanical/Pump Room Question.
(OP)
Does Mech/Pump Room needs any supply air from an ducted ac, or just ducted exhaust?
Thanks.
Thanks.
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Mechanical/Pump Room Question.
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RE: Mechanical/Pump Room Question.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Mechanical/Pump Room Question.
RE: Mechanical/Pump Room Question.
RE: Mechanical/Pump Room Question.
RE: Mechanical/Pump Room Question.
Typically, I have seen temperature based operation, resettable, for exhaust fan with interlock to outside air damper.
RE: Mechanical/Pump Room Question.
I would like to argue that the examples given in the code section are in relation to rooms that will not be accessed, while the pump rooms and mechanical rooms will be accessed on a much more regular basis.
I usually treat the mechanical room as an electrical room and provide conditioning off of the HVAC system anyway, but while this is allowed, I'm not 100% sure it's an appropriate method.
RE: Mechanical/Pump Room Question.
I've always considered mechanical rooms to be occupied space, or else the 6'8" required clearance should not be applicable (which is not applicable to interstitial).
RE: Mechanical/Pump Room Question.
for Mechanical rooms I generally look at the pump motor and other heat gains in the space to determine a ventilation rate. the same as you I have an exhaust fan controlling to space temperature with make-up from outside. via an OA damper. in some climates you need to consider treatment of the supply air if you have the risk of condensation.
RE: Mechanical/Pump Room Question.
In winter the pumped water is hot, but the room also needs to stay above freezing anyway., no need for cooling. the pump can handle the heat.
in summer, the pumps typically pump chilled water, so no need to cool.
I don't really see the need to do anything unless the pump room is next to a blast furnace or something that heats it up....
If it is freezing climate, you need to make sure it stays warm enough to not freeze pipes.
RE: Mechanical/Pump Room Question.
I think it is funny that higher ventilation rate is required for space that cannot be occupied (such as interstitial) as compared to space that requires 6'-8" clearance for personnel routinely (on a set schedule, typically down to shift or hourly) in an MER.
RE: Mechanical/Pump Room Question.
Does it have to come from a conditioned space or direct from AHU? The mechanical room is not 'occupied' so no it doesn't need conditioned air.
However, where the building is located should be taken into consideration in deciding if conditioned air is introduced into the mechanical room or not. In the southeast US where humidity is a serious problem, it is common practice to add conditioned air into mechanical rooms to help control humidity. Down here, introducing unconditioned air into any part of a building creates problems if not done properly. Whether or not this practice is a good idea in other parts of the country/world, I don't know since most of my experience is in the southeast. Go far enough north and I wouldn't think so.
So my answer rra1990's question is "It depends." More information is needed to properly answer the question.