Current through Reg. 50, No. 13; March 28, 2025
The design of the mechanical systems must be done by or
under the direction of a registered professional (mechanical) engineer approved
by the Texas Board of Professional Engineers and Land Surveyors to operate in
Texas, and the parts of the plans and specifications covering mechanical design
must bear the legible seal of the engineer. Building services pertaining to
utilities; heating, ventilating, and air-conditioning systems; vertical
conveyors; and chutes must be in accordance with NFPA 101. Required plumbing
fixtures must be in accordance with NFPA 101 and §
554.334 of this chapter (relating
to Architectural Space Planning and Utilization) in specific use areas.
(1) Plumbing.
(A) All plumbing systems must be designed and
installed in accordance with the requirements of the plumbing code of the
municipality. In the absence of a municipal code, a nationally recognized
plumbing code must be used. Any discrepancy between an applicable code and
these requirements must be called to the attention of HHSC.
(B) Supply systems must assure an adequacy of
hot and cold water. An average rule-of-thumb design for hot water for resident
usage (at 110 degrees Fahrenheit) is to provide 6-1/2 gallons per hour per
resident in addition to kitchen and laundry use.
(C) Water supply must be from a system
approved by TCEQ, or from a system regulated by an entity responsible for water
quality in that jurisdiction as approved by TCEQ.
(D) The sewage system must connect to a
system permitted by TCEQ, or to a system regulated by an entity responsible for
water quality in that jurisdiction as approved by TCEQ.
(E) The minimum ratio of fixtures to
residents shall be as required in §
554.334(c) of
this chapter.
(F) For design
calculation purposes, resident-use hot water must not exceed 110 degrees
Fahrenheit at the fixture. For purposes of conforming to licensure
requirements, an operating system providing water from 100 degrees Fahrenheit
to 115 degrees Fahrenheit is acceptable. Hot water for laundry and kitchen use
must be normally 140 degrees Fahrenheit except that dish sanitizing, if done by
hot water, must be 180 degrees Fahrenheit.
(G) Water closets raised to provide a seat
height 17 inches to 19 inches from the floor is required for persons with
disabilities.
(H) Showers for
wheelchair residents must not have curbs. Tub and shower bottoms must have a
slip-resistant surface. Shower and tub enclosures, other than curtains, must be
of tempered glass, plastic, and other safe materials.
(I) Drinking fountains must not extend into
exit corridors.
(J) Fixture
controls easily operable by residents must be provided (such as lever
type).
(K) Plumbing fixtures for
residents must be vitreous china or porcelain finished cast iron or steel
unless otherwise approved by HHSC. Bathing units constructed of class B fire
rated fiberglass are acceptable for use.
(L) Hand-washing sinks for staff use are
required in many areas throughout the facility in accordance with §
554.334 of this chapter (relating
to Architectural Space Planning and Utilization). Lavatories are required to be
provided adjacent to water closets in each area.
(M) The soiled utility room must be provided
with a flushing device such as a water closet with bedpan lugs, a spray hose
with a siphon breaker or similar device, such as a high neck faucet with lever
controls and a deep sink that is large enough to submerse a bedpan. A
sterilizer for sanitizing may be used in place of a deep sink.
(N) Siphon breakers or back-flow preventers
must be installed with any water supply fixture where the outlet or attachments
may be submerged.
(O) Clean-outs
for waste piping lines must be provided and located so that there is the least
physical and sanitary hazard to residents. Where possible, clean-outs must open
to the exterior or areas which would not spread contamination during clean-out
procedures.
(P) All boilers not
exempted by the Texas Health and Safety Code §
755.022 must
be inspected and certified for operation by The Texas Department of Licensing
and Regulation.
(2)
Heating, ventilating, and air-conditioning systems.
(A) Heating, ventilating, and
air-conditioning systems must be designed and installed in accordance with the
Heating, Ventilating, and Air-Conditioning Guide of the American Society of
Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE), except as may
be modified by this section.
(B)
Heating, ventilating, and air-conditioning systems must meet the requirements
of NFPA 101 and NFPA 90A. The plans must have a statement verifying that the
systems are designed to conform to NFPA 90A. Requirements for conditions
related to smoke compartmentation must be in accordance with §
554.336 of this chapter (relating
to Smoke Compartmentation (Subdivision of Building Spaces)).
(C) Systems using liquefied petroleum gas
fuel must meet the requirements of the Railroad Commission of Texas and NFPA
58.
(D) The heating system must be
designed, installed, and functioning to be able to maintain a temperature of at
least 75 degrees Fahrenheit for all areas occupied by residents. For all other
occupied areas, the indoor design temperature must be at least 72 degrees
Fahrenheit. The cooling system must be designed, installed, and functioning to
be able to maintain a temperature of not more than 78 degrees Fahrenheit. A
facility constructed or licensed after January 1, 2004, must have a central air
conditioning system, or a substantially similar air conditioning system, that
is capable of maintaining a temperature suitable for resident comfort within
areas used by residents. Occupied areas generating high heat, such as kitchens,
must be provided with a sufficient cool air supply to maintain a temperature
not exceeding 85 degrees Fahrenheit at the five-foot level. Supply air volume
must be approximately equal to the air volume exhausted to the exterior for
these areas.
(E) Air systems must
provide for mixing at least 10 percent outside air for the supply distribution.
Blowers for central heating and cooling systems must be designed so that they
may run continuously.
(F) Floor
furnaces, unvented space heaters, and portable heating units must not be used.
Heating devices or appliances must not be a burn hazard (to touch) to
residents.
(G) A combustion fresh
air inlet must be provided to all gas or fossil fuel operated equipment in
steel ducts or passages from outside the building in accordance with NFPA 54.
Rooms must also be vented to the exterior to exhaust heated ambient air in the
room. Combustion air will require one vent within 12 inches of the floor and
one vent within 12 inches of the ceiling.
(H) The location and design of air diffusers,
registers, and return air grilles, must ensure that residents are not in
harmful or excessive drafts in their normal usage of the room.
(I) In areas requiring control of sanitation,
the air flow must be from the clean area to the dirty area. Air supply to food
preparation areas must not be from air which has circulated places such as
resident bedrooms and baths.
(J)
Air from unsanitary areas such as janitors closets, soiled linen areas, utility
areas, and soiled area of laundry rooms, must not be returned and recirculated
to other areas.
(K) Intakes for
fresh outside air must be located sufficiently distant from exhaust outlets or
other areas or conditions which may contaminate or otherwise pollute the
incoming fresh air. Fresh air inlets must be appropriately screened to prevent
entry of debris, rodents, and animals. Provision must be made for access to
such screens for periodic inspection and cleaning to eliminate clogging or air
stoppage (see paragraph (3)(C)(i) of this subsection).
(L) Systems must be designed as much as
possible to avoid having ducts passing through fire walls or smoke barrier
walls. All openings or duct penetrations in these walls must be provided with
approved automatic dampers. Smoke dampers at smoke partitions must close
automatically upon activation of the fire alarm system to prevent the flow of
air or smoke in either direction.
(M) Ducts with smoke dampers must have
maintenance panels for inspections. The maintenance panels must be removable
without tools. Means of access must also be provided in the ceiling or side
wall to facilitate smoke damper inspection readily and without obstruction.
Location of dampers must be identified on the wall or ceiling of the occupied
area below.
(N) Fusible links are
not approved for smoke dampers.
(O)
Central air supply systems and/or systems serving means of egress must
automatically and immediately shut down upon activation of the fire alarm
system. (An exception must be approved, engineered smoke-removal
systems.)
(P) Ducts must be of
metal or other approved noncombustible material. Cooling ducts must be
insulated against condensation drip.
(3) Ventilating and exhaust.
(A) General ventilating systems must be in
accordance with paragraph (2) of this subsection.
(B) Provisions for natural ventilation using
windows or louvers must be incorporated into the building design where possible
and practical. These windows or louvers must have insect screens.
(C) All air-supply and air-exhaust systems
must be mechanically-operated. The ventilation rates shown in the table in
clause (xi) of this subparagraph must be considered as minimum acceptable rates
and must not be construed as precluding the use of higher ventilation rates.
(i) Outdoor air intakes must be located as
far as practical (but normally not less than 10 feet) from exhaust outlets or
ventilating systems, combustion equipment stacks, medical vacuum systems,
plumbing vent stacks, or from areas which may collect vehicular exhaust and
other noxious fumes.
(ii) The
ventilation systems must be designed and balanced to provide the pressure
relationship as shown in the table in clause (xi) of this subparagraph. A final
engineered system air balance report will be required for the completed system
to be furnished and certified by the installer.
(iii) The bottoms of ventilation openings
must be not less than three inches above the floor of any room.
(iv) Doors protecting corridors or ways of
egress must not have air transfer grilles or louvers. Corridors must not be
used to supply air to or exhaust air from any room except that air from
corridors may be used as make-up air to ventilate small toilet rooms, janitor's
closets, and small electrical or telephone closets opening directly on
corridors, provided that the ventilation can be accomplished by door undercuts
not exceeding 3/4 inches.
(v) All
exhausts must be continuously ducted to the exterior. Exhausting air into
attics or other spaces is not permitted. Duct material must be metal.
(vi) All central ventilation or
air-conditioning systems must be equipped with filters of sufficient efficiency
to minimize dust and lint accumulations throughout the system and building
including supply and return plenums and ductwork. Filters with efficiency
rating of 80 percent or greater (based on ASHRAE) are recommended. Filters for
individual room units must be as recommended by the equipment manufacturer.
Filters must be easily accessible for routine changing or cleaning.
(vii) Static pressures of systems must be
within limits recommended by ASHRAE and the equipment manufacturer (upstream
and downstream).
(viii) In
geographic locations or interior room areas where extreme humidity levels are
likely to occur for extended periods of time, apparatus for controlling
humidity levels (preferably between 40-60 percent) are recommended to be
installed as a part of central systems and with automatic humidistat
controls.
(ix) Exhaust hoods,
ducts, and automatic extinguishers for kitchen cooking equipment must be in
accordance with NFPA 96.
(x) Forced
air exhaust must be provided in laundries, kitchens, and dishwashing areas to
remove excess heat and moisture and to maintain air flow in the direction of
clean to soiled areas.
(xi)
Ventilation requirements for nursing areas must be according to the following
table:
Attached
Graphic
(xii)
With relationship to adjacent areas, a positive air pressure must be provided
for clean utility rooms, clean linen rooms, and medication rooms. Conditioned
supply air must be introduced into these rooms.
(4) Sprinkler systems. The following
requirements are applicable to sprinkler systems:
(A) Sprinkler systems must be in accordance
with NFPA 13 and this subchapter.
(B) The design and installation of sprinkler
systems must meet any applicable state laws pertaining to these systems and one
of the following criteria:
(i) The sprinkler
system must be designed by a qualified registered professional engineer
approved by the Texas Board of Professional Engineers and Land Surveyors to
operate in Texas. The engineer must supervise the installation and provide
written approval of the completed installation.
(ii) The sprinkler system must be planned and
installed in accordance with NFPA 13 by firms with certificates of registration
issued by the office of the state fire marshal that have at least one full-time
licensed responsible managing employee (RME). The RME's license number and
signature must be included on the prepared sprinkler drawings.
(C) Particular attention should be
paid to adequate, safe, and reasonable freeze protection for all piping. The
design of freeze protection should minimize the need for dependence on staff
action or intervention to provide protection.