Method a - (domestic hot water usage for c.1), Method b - (domestic hot water usage for c.2) – Lifebreath 4TONDHW(T) User Manual
Page 38
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METHOD A - (domestic hot water usage for C.1)
TABLE A 1 (NATURAL GAS AND PROPANE)*
No. of Bathrooms
1 to 1.5
2 to 2.5
3 to 3.5
No. of Bedrooms
1**
2
3
2
3
4
5
3
4
5
6
Nominal Tank Size (USG)
30
40
50
50
50
50
60
50
60
60
75
TABLE A 2 (OIL)*
No. of Bathrooms
1 to 1.5
2 to 2.5
3 to 3.5
No. of Bedrooms
1**
2
3
2
3
4
5
3
4
5
6
Nominal Tank Size (USG)
32
32
32
32
32
50
50
32
50
50
50
*
Not suitable for luxury or high volume applications
**
If laundry is ensuite for a one bedroom dwelling, increase tank size to 40 USG
METHOD B - (domestic hot water usage for C.2)
Activity
Average Volume per usage - USG
X
Times used in Peak Hour
= Peak hr Usage - USG
Shower
Hi-Flow (old)
Low-Flow (new)
5 min.
15
4
X
=
10 min.
30
7
X
=
15 min.
43
11
X
=
Bath Tub 1/2 full
21
X
=
Whirl Pool (60% tub cap.)
from manufacturer
X
=
Personal Use
3
X
=
Shampooing Hair
5
X
=
Clothes Washer hot/warm
40
X
=
warm/warm
27
X
=
warm/cold
20
X
=
Hand Dish Washing
4
X
=
Automatic Dish Washer
18
X
=
Food Preparation
6
X
=
Other
X
=
TOTAL (min. first hr. rating)
(transfer to C.2)
=