Indoor environment quality (IEQ) factors

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Question

What established or possible indoor environment quality (IEQ) factors exist? What kind of dose-responses have been defined for them?

Answer

Indoor environment quality (IEQ) factors(-)
Obs	Exposure metric	Response	Response metric	Exposure route	Exposure unit	ERF parameter	ERF	Description/Reference
1	Visible dampness and/or mold or mold odor	Respiratory health effect	Respiratory symptoms and diseases	Inhalation	yes/no	OR	several, see Note 1	Note 1
2	Dampness and/or mold	Depression		Inhalation, Other?				Note 2
3	Dampness and/or mold	Mental health problems	Anxiety; depression; various mental illness symptoms/indicators	Inhalation, Other?				Note 2
4	Dampness and/or mold	Self-assessed health poorer		Inhalation, Other?				Note 2
5	Wood smoke	Respiratory health effect	Respiratory symptoms and infections	Inhalation				Note 3, Note 4
6	Wood smoke	Irritation of eyes and mucosa
7	Wood smoke	Respiratory health effect	Asthma aggravating	Inhalation
8	Wood smoke	Odour problems		Inhalation
9	Wood smoke	Intimacy problems	Decreased intimacy of housing
10	Wood smoke	Chronic infections		Inhalation
11	Wood smoke	Cancer		Inhalation
12	Tobacco smoke	Respiratory health effect	Respiratory symptoms and infections	Inhalation
13	Tobacco smoke	Irritation of eyes and mucosa
14	Tobacco smoke	Respiratory health effect	Asthma aggravating
15	Tobacco smoke	Odour problems		Inhalation
16	Tobacco smoke	Intimacy problems	Decreased intimacy of housing
17	Tobacco smoke	Chronic infections		Inhalation
18	Tobacco smoke	Cancer
19	VOCs	irritation symptoms etc.
20	CO2	headache, tiredness etc.
21	CO	headache, tiredness etc.
22	Insufficient air exchange	Headache
23	Insufficient air exchange	Tiredness
24	Insufficient air exchange	Decreased ability to concentrate
25	Insufficient air exchange	Feeling of fug
26	Thermal conditions; heat	Tiredness
27	Thermal conditions; heat	Decreased ability to concentrate
28	Thermal conditions; heat	Increased respiratory symptoms
29	Thermal conditions; heat	Feeling of dryness
30	Thermal conditions; heat	Intimacy problems	Decreased intimacy of housing
31	Thermal comfort (draught or cold)	Mental health problems						Note 2
32	Thermal comfort (heat or cold)	Depression						Note 2
33	Thermal comfort (heat or cold; general perception of thermal problems)	Self-assessed health poorer						Note 2
34	Thermal conditions (cold)	Feeling of draught
35	Thermal conditions (cold)	Intimacy problems	Decreased intimacy of housing
36	Noise	Hearing injury
37	Noise	Sleep disturbance
38	Noise	Stress
39	Noise	Intimacy problems	Decreased intimacy of housing
40	Proximity to traffic	Mortality(?)
41	Radon	Lung cancer						Note 5
42	Relative humidity
43	PM	mortality						Note 3
44	PM	chronic bronchitis
45	PM	lung cancer
46	Reduced space (house/flat)	Depression						Note 2
47	Reduced space (house/flat)	Mental health problems						Note 2
48	Reduced space (house/flat)	Self-assessed health poorer						Note 2
49	Garden	Depression						Note 2
50	Floor level	Mental health problems						Note 2
51	Overcrowding	Mental health problems						Note 2
52	Overcrowding	Self assessed health poorer						Note 2
53	Sensory IAQ	Various health and well-being parameters

Note 1 ERF of indoor dampness on respiratory health effects

Note 2 WP6 well-being report

Note 3 ERF of PM2.5 on mortality in general population

Note 4 Concentration-response to PM2.5

Note 5 Health impact of radon in Europe

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Related files

Indoor environment quality (IEQ) factors. Opasnet . [1]. Accessed 18 Dec 2025.