ROOM
AREA (sq. ft) FIN TUBE LENGTH (ft)
Eat in Kitchen 1-1/2 Baths 3 Bedrooms Living Room
204
10’
100 (total) 156 (each)
5’
8’ per room
280
14’
Hall
48
0’ (no load – internal)
Total
53’
Main Floor Flow Calculations
However, the minimum flow through any run of HWBB is typically = 1 gpm, with NO more than 20’ of HWBB in any single run. Therefore:
Kitchen: 10’ < 20’ = 1 gpm 1- 1/2 Bathrooms: 5’ < 20’ = 1 gpm Living Room: 14’ < 20’ = 1 gpm Bedrooms: 8’ each < 20’ = 1 gpm per bedroom (3 gpm total)
6 gpm total required
A radiant floor manifold can be used with HWBB or wall mounted panel radiators to provide for individually controlled zones. In this case each bedroom could be a single zone with the remainder of the main level a single zone for a total of 4 zones. See the following diagram:
Figure 1: Main Level Floor Manifold Schematic
Use wall-mounted thermostats with manifold mounted zone control valves with end switch.
42
Hydronic System Design Manual ©DECTRA CORPORATION - March 2013
Made with FlippingBook - professional solution for displaying marketing and sales documents online