H. EXAMPLE PROBLEM – HOUSE WITH REMOTE POLE BARN/WORKSHOP
The following example problem uses the tools in this manual to size piping, pumps, and GARN® heating equipment for a typical house with a pole barn/workshop.
EXAMPLE PROBLEM SETUP: House:
Main floor – 1100 sq. ft - hot water base board (HWBB) Basement – 1100 sq. ft – radiant floor Newer construction – built in 2007
Shop:
Pole barn (where GARN® unit is to be located) 30’ x 40’ = 1200 sq. ft Radiant floor R19 walls, R38 ceiling, R10 underslab insulation 1 – 8’x10’ overhead door 1 – Personnel door 3 – 3’x4’ windows Located 127’ from house
HOUSE DESIGN: Estimate heat load (see “ Rules of Thumb for an Initial Estimate of Equipment Size ” )
[
]
[
]
MAIN FLOOR DESIGN: HWS = Choose 145°F ΔT = 10°F HWR = 135°F
HWBB – rated at 980 btuh/ft at 215°F
HWBB correction factor = 0.38 (see “ Water Temperature Correction Factors ”)
[
]
[
]
Total feet of active fin tube =
[
]
The total feet of active fin tube needs to be divided up among the main floor rooms based on a calculated heat loss for each room. The fin tube can be roughly split:
41
Hydronic System Design Manual ©DECTRA CORPORATION - March 2013
Made with FlippingBook - professional solution for displaying marketing and sales documents online