Onix Tubing Installation Manual

Watts Radiant: Onix Installation Manual page 15
Zone List Report
Each Zone List contains important
information on what is required to
properly heat a given area. It is impor-
tant to verify that the Radiant Capacity
for each room within a zone is greater
than the Required Heat. If this is not
the case, then the room will require
auxiliary heat.
Assumption Report
The Assumption Report is a way to
convey information about the heating
system to those working on the proj-
ect. It shows all of the assumed values
and conditions taken from a plan or
blueprint when calculating the heating
load for a project. If things are differ-
ent from what is assumed, then
changes to the heating design need to
be made.
All projects change during the con-
struction process. Windows get added
to the living room, a fireplace is added
to the family room, etc. Hardwoods
replace carpet or a skylight goes into
the master bathroom. In most cases,
these changes happen after the initial
radiant design is done. Although these
changes seem small and inconsequen-
tial, they can have a drastic impact on
how a radiant floor heats a space.
If the window size for the family room
goes from 30 sq.ft. to 50 sq.ft., the
heat loss through that section of wall
just increased over 60%! This simple
construction change might require
modifications to the radiant heating
system, such as additional banding
(tighter tube spacing along an exposed
wall) or higher water temperatures and
possibly a larger heat source.
Heat Loss Report
The Heat Loss Report is a room-by-
room breakdown of exactly where heat
loss is taking place. This information
is used to identify those items that are
causing an unusually high heating
load. For example, assume the load for
ZONE 1 - MAIN LEVEL (Under-Floor)
Room Specifications
Room Name Primary
Spacing
[in]
Primary
Area
[ft≤]
Banded
Spacing
[in]
Banded
Area
[ft≤]
Heating
Intensity
[Btu/h ft≤]
Required
Heat
[Btu/h]
Radiant
Capacity
[Btu/h]
Foyer 8 118 --- --- 15.7 1,853 2,421
Powder Room 4 42 --- --- 27.2 1,144 1,147
Breakfast / Kitchen
/ Family / Pantry
8 520 4 180 17.2 12,012 13,832
Hall 8 135 --- --- 16.0 2,154 2,484
Zone Specifications
Supply
Fluid [∞F]
Delta T
[∞F]
GPM Head
[ft]
Radiant
Panel
Load
[Btu/h]
Product
Type
Tube
Length [ft]
No. of
Circuits
112 20 2.4 2.1 24,038 3/8" Onix 200 11
Pump Specs & Radiant Panel Load are calculated on the smaller of
Required Heat or Radiant Capacity (+ back and edge losses)
Project Assumptions
OutsideTe
mp [∞F]
Elevation
[ft]
Wind
Speed
[mph]
Glycol Job Type System
Chemicals
0 1268 10 None Residential No
ZONE 1 - MAIN LEVEL (Under-Floor) [3/8" Onix]
Min Tube Length: 20 ft Max Tube Length: 200 ft Circuit Rounding: 20 ft
Supply Water
Temp:
112.3 F Delta T: 20 F Manifold Distance: 0 ft
Joist Spacing: 16 in Joint Thickness: 1.5 in Joist Conductivity: 0.078 Btu/h-
ft-F
Subfloor Thickness: 0.75 in Subfloor
Conductivity:
0.085 Btu/h-
ft-F
Foyer
Room Size Parameters:
Area: 118 ft≤ Perimeter: 44 ft Total Area: 118 ft≤
Heated Floor Area: 118 ft≤ Unheated Floor
Area:
0 ft≤
Room Construction Parameters:
Space Below: Crawl
Space
Crawl Space
Insulation:
Yes
Foil Faced
Insulation
Thickness:
3.5 in Tube Spacing: 8
Room Heat Loss Parameters:
Indoor Design
Temp:
68 F Max Eff. Surface: 85 F Heating Intensity: 15.70 Btu/h
ft≤
Floor Covering: Tile Floor &
Mudset
R Value: 0.16 Unheated Floor R
Value:
19
ACH: 0.5 CFM: 7.867 Number of Stories: 1
Ave. Ceiling
Height:
9 ft Exp'd Ceiling Area: 118 ft≤ Ceiling R Value: 30
ZONE 1 - MAIN LEVEL (Under-Floor)
Calculated Heat Loss for Foyer @ 68 F Indoor
Description Units R-Value Heat Loss
[Btu/h]
Infil. Loss
[Btu/h]
Total Loss
[Btu/h]
Exposed Walls 59 ft≤ 13 303 0 303
Doors 21 ft≤ 2 635 0 635
Exposed Ceiling Area 118 ft≤ 30 265 0 265
Infiltration 0.5 ACH 650 650
Totals 1203 650 1853
Zoning
RadiantWorks Zone List Report
RadiantWorks Assumption Report
RadiantWorks Heat Loss Report