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SANS Committees:
Healthcare Watch
-Report Back
Toby v Reenen
CSIR
SANS 204:
ENERGY EFFICIENCY IN BUILDINGS
Services Working Group
• Work being concluded on interpretation and application of XA2
50% hot water rule.
• XA2 demands that 50% of annual hot water consumed be
generated by means other than direct electric heating.
• The intention of the rule is to save a minimum of 50% of the
water heating energy.
• Unfortunately the wording “by volume” in the ruling allows
for significantly lower savings to be accepted by solar water
heating and heat pump installations.
SANS 204:
ENERGY EFFICIENCY IN BUILDINGS
Services Working Group
• Work being concluded on interpretation and application of XA2
50% HOT WATER RULE.
• It is proposed that the voluntary SANS 204 standard pilot a
more stringent requirement of demanding that 50% of the
ENERGY REQUIRED in GENERATING the consumed hot water
volume be from means other than direct electric heating.
• The issue of the viability of induction geysers has also been
raised for review.
SANS 204: ENERGY EFFICIENCY IN
BUILDINGS - Climate Map
• The Existing Climate Map is being
reviewed:
• Simple to interpret
• Coarse resolution of “binning”
doesn’t reflect local nuances in
climate
• Very difficult to measure and
quantify
• Doesn’t offer detailed insight to
design information
SANS 204: ENERGY EFFICIENCY IN
BUILDINGS - Climate Map
• A Revised Map needs the following:
• Map data needs to be relevant to
building energy calculations, tools,
regulations and standards
• Needs to allow for clear
interpretation by stakeholders
• Needs to reflect the human
perception of climate
• Needs to reflect building response
to climate (Passive design)
• RH%
• Convection?
SANS 204: ENERGY EFFICIENCY IN
BUILDINGS - Climate Map
• Proposed model
• Calculate SET using current best
climate data.
• Develop index representing
Summer-High & Winter-Low SET
per cell. (A:B)
• Single index could then be used in
consideration of seasonal peak
heating and cooling requirements
SANS 1544: ENERGY PERFORMANCE
CERTIFICATES
• This committee has established to
finalise the drafting of the standard for
energy performance certificates.
• The measurement defined by this
standard includes energy consumption
data collected from one year of
operation of a building but excluding its
first year of operation.
• The energy consumption data includes
building as well as operational energy
• This annual value will then be
benchmarked against the guidance
values from SANS 10400-XA.
SANS 1544: ENERGY PERFORMANCE
CERTIFICATES
• It is noted that the SANS 10400-XA
does not define energy
consumption guidelines data for
healthcare buildings and the
committee would welcome the
submission of healthcare based
energy consumption data for
evaluation and inclusion.
SANS 10400-O: VENTILATION &
LIGHTING
• This committee was established to address a number of
concerns regarding the lighting and ventilation requirements
contained therein.
• Of particular concern to healthcare buildings is the
methodology adopted by and contents of Table 2.
• Application of ASHRAE 62.1
• Additive Method
• Nuanced Approach
• Can result in more energy efficient systems
• Requirements for Respiratory Isolation Rooms (WHO Guide)
• Lighting: Task Lighting & Colour Rendering Index
IUSS: Ventilation Design Philosophy
• Hierarchy of Design Solutions

Area Occupied

Fully Mechanical
Ventilation

Occupants/Equipment
NOT ADAPTABLE or
Tolerant of
Indoor Conditions

Hybrid systems with
Climatic adaptability
Fully Passive
Ventilation

Occupants/Equipment
ADAPTABLE or
Tolerant of
Indoor Conditions
SANS 10400: Future work
• Other work that will be addressed as the committees are
established:
• Fire protection requirements in healthcare buildings
• (Your comments here)
• (and here)
• (and here)
Sans healthcare watch

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Sans healthcare watch

  • 2. SANS 204: ENERGY EFFICIENCY IN BUILDINGS Services Working Group • Work being concluded on interpretation and application of XA2 50% hot water rule. • XA2 demands that 50% of annual hot water consumed be generated by means other than direct electric heating. • The intention of the rule is to save a minimum of 50% of the water heating energy. • Unfortunately the wording “by volume” in the ruling allows for significantly lower savings to be accepted by solar water heating and heat pump installations.
  • 3. SANS 204: ENERGY EFFICIENCY IN BUILDINGS Services Working Group • Work being concluded on interpretation and application of XA2 50% HOT WATER RULE. • It is proposed that the voluntary SANS 204 standard pilot a more stringent requirement of demanding that 50% of the ENERGY REQUIRED in GENERATING the consumed hot water volume be from means other than direct electric heating. • The issue of the viability of induction geysers has also been raised for review.
  • 4. SANS 204: ENERGY EFFICIENCY IN BUILDINGS - Climate Map • The Existing Climate Map is being reviewed: • Simple to interpret • Coarse resolution of “binning” doesn’t reflect local nuances in climate • Very difficult to measure and quantify • Doesn’t offer detailed insight to design information
  • 5. SANS 204: ENERGY EFFICIENCY IN BUILDINGS - Climate Map • A Revised Map needs the following: • Map data needs to be relevant to building energy calculations, tools, regulations and standards • Needs to allow for clear interpretation by stakeholders • Needs to reflect the human perception of climate • Needs to reflect building response to climate (Passive design) • RH% • Convection?
  • 6. SANS 204: ENERGY EFFICIENCY IN BUILDINGS - Climate Map • Proposed model • Calculate SET using current best climate data. • Develop index representing Summer-High & Winter-Low SET per cell. (A:B) • Single index could then be used in consideration of seasonal peak heating and cooling requirements
  • 7. SANS 1544: ENERGY PERFORMANCE CERTIFICATES • This committee has established to finalise the drafting of the standard for energy performance certificates. • The measurement defined by this standard includes energy consumption data collected from one year of operation of a building but excluding its first year of operation. • The energy consumption data includes building as well as operational energy • This annual value will then be benchmarked against the guidance values from SANS 10400-XA.
  • 8. SANS 1544: ENERGY PERFORMANCE CERTIFICATES • It is noted that the SANS 10400-XA does not define energy consumption guidelines data for healthcare buildings and the committee would welcome the submission of healthcare based energy consumption data for evaluation and inclusion.
  • 9. SANS 10400-O: VENTILATION & LIGHTING • This committee was established to address a number of concerns regarding the lighting and ventilation requirements contained therein. • Of particular concern to healthcare buildings is the methodology adopted by and contents of Table 2. • Application of ASHRAE 62.1 • Additive Method • Nuanced Approach • Can result in more energy efficient systems • Requirements for Respiratory Isolation Rooms (WHO Guide) • Lighting: Task Lighting & Colour Rendering Index
  • 10. IUSS: Ventilation Design Philosophy • Hierarchy of Design Solutions Area Occupied Fully Mechanical Ventilation Occupants/Equipment NOT ADAPTABLE or Tolerant of Indoor Conditions Hybrid systems with Climatic adaptability Fully Passive Ventilation Occupants/Equipment ADAPTABLE or Tolerant of Indoor Conditions
  • 11. SANS 10400: Future work • Other work that will be addressed as the committees are established: • Fire protection requirements in healthcare buildings • (Your comments here) • (and here) • (and here)