HHSRS 07/06
06 (IDeA - 02)
July 2006
CARBON MONOXIDE AND FUEL COMBUSTION PRODUCTS
Yes
Yes
No
No
Vulnerable age
Related hazards
All persons aged 65 years and over
Fire, Nitrogen Dioxide, Explosions
Multiple locations
Secondary hazards
Ground floor rear room
DESCRIPTION OF HAZARDS
DWELLING:
Two storey mid terraced house
built in 1923
Background: The property is of traditional brick construction with slate covered roof. There are two rooms,
kitchen and bathroom on the ground floor and three rooms on the first floor. There are gas fires in both the
front and rear living rooms. The gas fire shown above is in the rear room. The gas fire is not fixed and can be
easily moved away from the flue back plate. A metal plate on top of the gas fire can also be removed
exposing the flue fittings at the rear of the fire. No valid gas certificate is available. The fire was ignited at the
time of the survey and a yellow flame could be observed from time to time over a period of 5 minutes. There
is no permanent ventilation to the room. Hot water for the bathroom and kitchen is provided by a gas water
heater in the kitchen.
LIST OF RELEVANT MATTERS
LIKELIHOOD & OUTCOMES
3
Seriously defective
2
Defective
1
Not satisfactory
-
Satisfactory/NA
2
Secondary Hazards
-
-
3
2
2
-
-
-
-
-
# Compounding matters
-
None
A
B
-
-
a
Open flued appliances
b
Flueless appliances
c
Disrepair to appliances
d
Inadequate ventilation
e
State of flues
f
Disrepair to flues
g
Flue outlet siting
h
Extractor fans
i
Ventilation lobby
j
CO detectors
Key
06 (IDeA - 02)
July 2006
HEALTH AND SAFETY RATING SYSTEM SCORES
LIKELIHOOD
Low
High
1 in 3
Av: 1920-45 Non-HMOs: 1,080
3
< 4200 2400 1300 750 420 240 130
75
42
24
13
7.5
4
2.5
1.5 >
Justification
The lack of suitable fixing or sealing of the rear room gas fire, the broken radiant and
yellow flame significantly increase the likelihood of an occurrence that could cause harm.
There is evidence of incomplete combustion and the lack of adequate ventilation increases
the likelihood that carbon monoxide will be emitted into the room. The room is likely to be
occupied intensively and the heating used extensively in winter months.
OUTCOMES
%
Av: 1920-45 Non-HMOs: 0.0
Class I
0.0
< 0.05 0.15 0.3
0.7
1.5
3
7
15
26
38 >
Av: 0.0
Class II
0.0
< 0.05 0.15 0.3
0.7
1.5
3
7
15
26
38 >
Av: 2.0
Class III
2.2
< 0.05 0.15 0.3
0.7
1.5
3
7
15
26
38 >
Av: 98.0
Class IV
97.8
< 0.05 0.15 0.3
0.7
1.5
3
7
15
26
38 >
Justification
There is nothing to suggest that the outcomes will be more severe than the national
average.
Av. 1920-45 Non-HMOs: 1
RATING
A
B
C
D
E
F
G
H
I
J
Score:
546
RATING SCORES AFTER IMPROVEMENT
IMPROVE
Likelihood to
1 in 1000
Outcomes to
0
0.0
2.2 97.8
%
Justification
By replacing and securely fitting to the back plate a new gas fire (the work to satisfy the
current Gas Safety (Installation and Use) Regulations), ensuring adequate permanent
ventilation, the likelihood will be reduced to average. As these are open flued appliances,
it is also advisable to fit CO detectors.
Av: 1
NEW RATING
A
B
C
D
E
F
G
H
I
J
Score:
1
Av: Nos
Average likelihood and health outcomes for all persons aged 65 years and over, 1997-99.