| |
Name
of
company |
"AVIN" |
Company
X |
Company
Y |
|
1 |
Experience
in
solar
water
heaters
in
years |
Since
1980 |
? |
? |
|
2 |
Quality
of
hot
water |
Hottest |
Hot |
Warm |
|
3 |
Highest
Temperature
at
which? |
60
to
80
deg.
C. |
50
to
60
deg.
C. |
30
to
40
deg.
C. |
|
4 |
Quantity
of
water
/
collector |
100
to
150
litres |
80
to
100
litres |
60
to
80
litres |
|
5 |
Area
of
collector |
2
sq.
mtrs |
? |
? |
|
6 |
Chemical
change
in
water
after
heating |
Better
for
health,
salts
removed,
demonized |
? |
? |
|
7 |
Life
Span
of
System |
15
years |
? |
? |
|
8 |
Life
Span
of
Collector |
15
years |
? |
? |
|
9 |
Basic
material
used |
Bit
higher-copper |
? |
? |
|
10 |
Maintenance
per
year
Plumber
friendly |
Every
5
years
yes |
Unbearable
no |
100
%
replacement |
|
11 |
Life
span-
according
to
water
quality |
10
to
15
years |
? |
? |
|
12 |
Resale
value
after
life
span |
Scrap
value
of
copper
on
that
day
:
good |
? |
? |
|
13 |
Payback
period
of
system |
2
–
3
years |
? |
? |
