Proper Sizing for Hotel Guestroom Units

Summary: Reduce noise with proper sizing of guestroom units.  But be careful with undersizing the heating capacity.

One of the big temptations for designers of hotels is to oversize the guestroom units.  This is especially true of the cooling mode.  My observation has always been that the most important time for a guestroom to perform properly is at night, and at night there is no solar load.  So by oversizing a unit for peak solar load plus all other extreme assumptions about the load in the room, the result is a unit is far over sized for the night.  This always translates into excessive noise. 

The only caution is to make sure the units are sized adequately for heating at night in cold climates.  At night there is no heat gain from such things as lights and the television once the guest goes to bed.  The in-room refrigerator is the one exception that produces heat all night long, but it is not significant. 

If you are using heat pumps, make sure the supplemental strip heat is large enough.  In the case of hydronic systems, make sure the boilers can maintain water temperature in the extreme cold conditions with ample spare capacity for the very extreme cold.  Unlike cooling, guests have no tolerance for an occasional cold night.  An occasional hot day is expected, but not a cold night.

One Response to “Proper Sizing for Hotel Guestroom Units”

  1. david Says:

    reminds me of a hotel i worked at that had these huge hvac units in a closet in the bedroom. these things were big enough to heat and cool a small house, yet we used them for small hotel rooms. we tried wrapping the compressors with sound absorbing blankets, among other things and we never got rid of the noise complaints

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