Page 109 - GRIHA Manual Volume IV - Introduction to National Rating System
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100 Griha Manual: Volume 4
27.2.5 A certificate from the fire-fighting service consultant or the equipment supplier, signed
by the architect or the engineer, stating that the fire suppression systems and fire
extinguishers installed in the building are free of halon.
27.3 Appraisal (mandatory 1 point)
27.3.1 All the insulation used in the building are CFC and HCFC free as per clauses 27.2.1
and 27.2.2.
27.3.2 All the HVAC and refrigeration equipment are CFC free, as per clauses 27.2.3 and 27.2.4.
27.3.3 The fire suppression systems and fire extinguishers installed in the building are free of
halon, as per clause 27.2.5.
Methodology
Research and specify all building systems with non-ozone-depleting equipment. Building systems
to consider include HVAC, refrigeration, insulation, and fire suppression systems. Common
substitutes for HCFCs in HVAC and refrigeration systems are hydro fluorocarbons (HFCs). While
HFCs have substantially lower ODPs, they have higher Global Warming Potentials (GWPs). Thus, it
is important to study different potential substitutes and choose the most appropriate substitute
with the lowest environmental impact. Table 4 provides a list of common refrigerants and their
associated environmental data.
Table 4 Refrigerant environmental data
Refrigerant Lifetime Ozone Depleting Global Warming
(years) Potential
CFC-11 45 1 4000
CFC-12 100 1 8500
CFC-13 640 1 11 700
CFC-113 85 1 5000
CFC-114 300 1 9300
CFC-115 1700 1 9500
Halon-1211 11 3 n/a
Halon-1301 65 10 5600
Halon-2402 n/a 6 n/a
HCFC-22 12 0.06 1700
HCFC-123 1 0.02 93
HCFC-124 6 0.02 480
HCFC-141b 9 0.11 630
HCFC-142b 19 0.07 2000
HFC-32 5.6 0 650
HFC-125 32.6 0 2800
HFC-134a 14.6 0 1300
HFC-143a 48.3 0 3800
HFC-152a 1.5 0 140
HFC-236fa 209.0 0 6300
Source EPA’s Ozone Depletion Website
27.2.5 A certificate from the fire-fighting service consultant or the equipment supplier, signed
by the architect or the engineer, stating that the fire suppression systems and fire
extinguishers installed in the building are free of halon.
27.3 Appraisal (mandatory 1 point)
27.3.1 All the insulation used in the building are CFC and HCFC free as per clauses 27.2.1
and 27.2.2.
27.3.2 All the HVAC and refrigeration equipment are CFC free, as per clauses 27.2.3 and 27.2.4.
27.3.3 The fire suppression systems and fire extinguishers installed in the building are free of
halon, as per clause 27.2.5.
Methodology
Research and specify all building systems with non-ozone-depleting equipment. Building systems
to consider include HVAC, refrigeration, insulation, and fire suppression systems. Common
substitutes for HCFCs in HVAC and refrigeration systems are hydro fluorocarbons (HFCs). While
HFCs have substantially lower ODPs, they have higher Global Warming Potentials (GWPs). Thus, it
is important to study different potential substitutes and choose the most appropriate substitute
with the lowest environmental impact. Table 4 provides a list of common refrigerants and their
associated environmental data.
Table 4 Refrigerant environmental data
Refrigerant Lifetime Ozone Depleting Global Warming
(years) Potential
CFC-11 45 1 4000
CFC-12 100 1 8500
CFC-13 640 1 11 700
CFC-113 85 1 5000
CFC-114 300 1 9300
CFC-115 1700 1 9500
Halon-1211 11 3 n/a
Halon-1301 65 10 5600
Halon-2402 n/a 6 n/a
HCFC-22 12 0.06 1700
HCFC-123 1 0.02 93
HCFC-124 6 0.02 480
HCFC-141b 9 0.11 630
HCFC-142b 19 0.07 2000
HFC-32 5.6 0 650
HFC-125 32.6 0 2800
HFC-134a 14.6 0 1300
HFC-143a 48.3 0 3800
HFC-152a 1.5 0 140
HFC-236fa 209.0 0 6300
Source EPA’s Ozone Depletion Website
