MIL-HDBK-1191
TABLE
9-3
HOT WATER DEMAND per FIXTURE for MTF's
HW
L/H (GPH)
SFU
FIXTURE
Sink, Clinic
15 ( 4)
3
Sink, Plaster
38 ( 10)
3
Sink, Service (General)
76 ( 20)
3
Lavatory, Public (General)
23 ( 6)
1
Lavatory, Patient (Private)
8 ( 2)
1
Lavatory, Clinic
30 ( 8)
3
Basin, Mop Service
76 ( 20)
3
Shower, Staff or Patient Group
284 ( 75)
3
Shower, Patient (Private)
114 ( 30)
2
Shower, Hydrotherapeutic
1520 (400)
11
Bathtub
76 ( 20)
3
Bath, Whirlpool, Arm
130 ( 35)
3
Bath, Whirlpool, Arm/Foot/Knee
57 ( 15)
3
Bath, Whirlpool, Leg
380 (100)
7
Bath, Body Hydrotherapy (Hubbard)
2270 (600)
17
Bath, Sitz
114 ( 30)
3
Processor, X-ray
57 ( 15)
3
Hot Water Design Temperature. Domestic hot water shall be
9.2.6.2
generated and stored at 60 degrees C (140 degrees F) minimum. It shall
be tempered with a thermostatic mixing valve at the hot water generator
discharge to permit distribution at a temperature range between 43 and 52
degrees C (110-126 degrees F). The maximum hot water temperature
distribution design setpoint shall be 43 degrees C (110 degrees F).
However, provide the capability to increase system temperature to 52
degrees C (126 degrees F) to permit an MTF the option to increase the
temperature if so recommended by the Infection Control Officer. It is
extremely important to note that at this temperature the exposure time
for a first-degree burn is approximately 45 seconds. This is considered
an adequate period for a fully aware adult to remove the exposed body
area from the stream of a sink or lavatory, thereby maintaining a
relatively safe condition at these fixtures without the requirement for
an anti-scald valve. Infants, persons desensitized by medical condition
or treatment, or those with severely limited motor capabilities, may be
endangered by water at this temperature. Anti-scald valves shall be
provided as close as possible to the taps of "whole-body" fixtures such
as showers, bathtubs, and hydrotherapy baths. Hot water recirculation
systems shall be designed to limit system temperature drop to 3 degrees C
(5.5 degrees F) or less. Maximum hot water temperatures for other
applications shall not exceed the following:
(a) Supply and Utility Areas. Central sterile supply, soiled
utility rooms equipped with bedpan washers, cart wash areas, and special
pathological wash areas shall be provided with 60 degrees C (140 degrees
F) hot water.
(b) Kitchen Areas. The temperature normally required in
dietary areas is the same as that distributed to standard hand washing
and bathing plumbing fixtures. Dishwashing (automatic equipment) and pot
washing normally require 82 degrees C (180 degrees F). Booster heaters
shall be provided to obtain this temperature.
(c) All Other. All other domestic hot water applications
shall be provided with a hot water temperature the same as is distributed
to standard hand washing and bathing fixtures.
9-10
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