Atmos Heating Systems
21
Put ballast on the four corners of the frame.
Minimum required ballast for 15 tube
collector
Built up area
Open
countryside
H
e
ig
h
t
a
b
o
v
e
g
ro
u
n
d
[
m
]
A
re
a
I
A
re
a
I
I
A
re
a
I
II
A
re
a
I
A
re
a
I
I
A
re
a
I
II
2
255
207
169
255
207 169
3
255
207
169
283
207
169
4
255
207
169
321
245
169
5
255
207
169
350
274
169
6
255
207
169
378
297
169
7
255
207
169
402
321
169
8
255
207
169
421
335
169
9
255
207
169
435
354
169
10
283
231
188
454
369
188
11
312
255
207
468
383
207
12
335
274
226
482
397
226
The tables show the minimum
required ballast weight in kg
needed to secure the collector.
This applies for collectors at 35°
angle.
•
Area I is an area of the country
prone to high winds.
•
Area II is an area with medium
high winds.
•
Area III has normal or moderate
winds.