SIZE DISTRIBUTION PUMP
MicroFlex®
16.2’
1- 1/4” Copper @ GARN®
(
)
2” Steel @ GARN®
(
)
Mixing Valve
4.75’
Subtotal
22’
Misc Fittings
10%
Total Head Loss 24.2’ Size the house pump for 9 gpm @ 24.2’
Choose a Taco 0011-IFC variable speed pump with pump control center. Activate pump whenever house pump activates and s et to maintain ΔT=10°F. For more information see:
TACO® HVAC 0011-IFC Circulator TACO® 0011-IFC Performance Curve
POLE BARN DESIGN
Estimate the heat loss (using ASHRAE methods):
(
) (
)
(
)
[
]
Total Heat Loss = 18,155 [btuh]
Notice that the overhead door, personnel door, and windows are 39.5% of the total loss.
Fr om a Radiant Floor Design manual for 5/8” tubing at 12” on center: Surface temperature = 76°F EWT = 85°F; RWT = 75°F; Avg. water temperature = 80°F Assume no glycol
Maximum length for 5/8” PEX tubing = 450’. Calculate # of loops for 5/8” PEX:
45
Hydronic System Design Manual ©DECTRA CORPORATION - March 2013
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