ZELENI DVORI Croatia 2019

SUSTAVNO PROZRAČIVANJE PROSTORIJA UZ REKUPERACIJU
SYSTEMATIC HEAT RECOVERY VENTILATION
Prema istraživanjima, većina ljudi provodi više od 80% svog života
u zatvorenim prostorima (stanovi i kuće, škole, uredi, tvornice…). U
zatvorenim prostorima zrak se neprekidno onečišćuje disanjem, raznim
mirisima, česticama prašine i sl. Time se često iznad higijenske granice
povećavaju udjeli ugljičnog dioksida (CO2) i s njim generirani lako hlapljivi
spojevi, te relativna vlažnost zraka, što loše djeluje na zdravlje (alergijske
reakcije, manjak koncentracije, pojačano znojenje, umor, nesanica,
glavobolja i mučnina, astma…).
According to research, most people spend over 80% of their lives indoors
(in apartments and houses, schools, offices, factories...).
Indoor air is continuously polluted by breathing, various odours, dust
particles, etc. This often increases the concentration of carbon dioxide
(CO2), of highly evaporable compounds that are co-generated with it, and
of relative humidity above the hygiene level, which has an adverse effect
on health (allergic reactions, poor concentration, increased perspiration,
fatigue, insomnia, headache and nausea, asthma...).
Istraživanjima je utvrđeno da je za ugodan boravak, dobro raspoloženje
i zdrav san u zatvorenom prostoru potreban svjež zrak s udjelom CO2 u
granicama između 500 i 1000 ppm i relativnom vlažnošću između 40%
i 60%.
Sadržaj od 1500 ppm CO2 u zraku i 70% relativne vlažnosti zraka su
higijenska granica, iznad čega je daljni boravak u prostoru neugodan i
nezdrav bez unosa svježeg zraka (prozračivanja).
Svaki zatvoreni prostor mora se povremeno ili stalno (manualno ili
sustavno) prozračivati, kao npr. otvaranjem prozora ili instaliranim
sustavima za prozračivanje.
Otvaranjem prozora i puštanjem vanjskog zraka u prostor ne možemo
spriječiti i upuštanje neželjenih sadržaja (vanjske buke, alergena, prašine,
propuha, hladnoće ili vrućine).
Research has shown that fresh air with a CO2 concentration between
500 and 1000 ppm and relative humidity between 40% and 60% is
necessary for comfortable living, good mood and healthy sleep indoors.
A CO2 concentration of 1500 ppm and 70% relative humidity are the
hygiene limit above which further stay indoors becomes unpleasant and
unhealthy if fresh air (ventilation) is not introduced.
Every indoor space must be ventilated occasionally or continuously
(manually or systematically), e.g. by opening windows or activating
installed ventilation systems.
By opening windows and introducing outdoor air we cannot prevent
the introduction of unwanted elements (outdoor noise, allergens, dust,
draught, cold or heat).
U ovako nekontrolirano i nepraktično
prozračivanim prostorima se stvara:
• manje ugodan do neugodan
ambijent za boravak, zbog
stalnog prilagođavanja
organizma,
• promjena kakvoće zraka (sadržaji
u zraku, temperatura i relativna
vlažnost zraka, propuh, buka,
insekti…),
• visoki troškovi postizanja
ambijenta za boravak, zbog
velikih energetskih gubitaka
prozračivanjem,
• briga o kakvoći i obveza utjecaja
na kakvoću zraka u prostoru
zimska hladnoća
coldness
pelud
pollen
buka
noise
ljetna vručina
hotness
SVJEŽI ZRAK
FRESH AIR
USTAJALI ZRAK
STAGNANT AIR
toplinski gubitci financijski gubitci
heat losses financial losses
Such spaces with uncontrolled and
impractical: ventilation create:
• A less pleasant or unpleasant
indoor climate due to the body’s
continuous need to adapt;
• Changes in air quality (air
particulates, temperature and
relative humidity, draught, noise,
insects...);
• High costs of achieving a
pleasant indoor climate due to
high energy losses caused by
ventilation;
• Concern about the quality of
indoor air and an obligation to
improve it.
ZELENI DVORI BISTRA I 37