Why do I have no heat energy and very high fan energy

asked 2018-02-02 20:15:31 -0600

RBallard's avatar

I have 3 story office building with a separate roof top package -- DX cooling and hot water heat from DES system --in each office space. My cooling loads are reasonable, but I have no heat and very high fan loads. Obviously, the fans are providing all the heat. No DES heat is used except for SHW. I have checked the fan air volumes, and they are reasonable. I have set all fans to draw .9watt/cfm of air. I do not see the problem.

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Do your fans run continuously 24/7?

rraustad's avatar rraustad  ( 2018-02-02 20:36:32 -0600 )edit

No. And that would not explain the absence of any heat at all. The calculated heat load is also higher than the calculated fan power for the specified air flow. Its almost as if the DES heat energy is being reported as part of the fan energy.

RBallard's avatar RBallard  ( 2018-02-02 23:21:32 -0600 )edit

what's the climate?

Joe Huang's avatar Joe Huang  ( 2018-02-03 02:41:05 -0600 )edit

Victoria, Canada, ASHRAE 4C

RBallard's avatar RBallard  ( 2018-02-03 12:31:48 -0600 )edit

Are your rooms all meeting the setpoint? It's possible your fans aren't providing the heat, and instead you just aren't heating.

bbrannon4's avatar bbrannon4  ( 2018-02-05 17:45:05 -0600 )edit
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