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

Occupants/Equipment NOT ADAPTABLE or

Tolerant of Indoor Conditions

Occupants/Equipment ADAPTABLE or

Tolerant of Indoor Conditions

• Hierarchy of Design Solutions

Fully Mechanical Ventilation

Hybrid systems with Climatic adaptability

Fully Passive Ventilation

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IUSS: Ventilation Design Philosophy

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)