HFOs

O Hydrofluoroolefins (HFOs) o ni vailaʻau faʻaola e leʻi faʻatumuina e aofia ai le hydrogen, fluorine ma le carbon. E le pei o hydrofluorocarbons masani (HFCs) ma chlorofluorocarbons (CFCs), ia e faʻatumuina, o HFOs o olefins, e taʻua foʻi o alkenes. O loʻo atiaʻe HFOs o ni refrigerants "fa tupulaga" e matua maualalo lava le gafatia e faʻaosofia ai le vevela o le lalolagi e 0.1% o HFCs. O oloa HFO e puʻupuʻu le ola i le ea ma ua faʻavasegaina o loʻo leai se ODP (Ozone Depletion Potential) ma maualalo le GWP (Global Warming Potential), ma maua ai se isi auala e sili atu ona lelei mo le siosiomaga nai lo CFCs, HCFCs ma HFCs.
O le polyurethane foam e gaosia e faʻaaoga ai HFOs e fai ma mea e agi ai e faʻaaogaina lautele i vaega o taʻavale ma faufale i le tulaga o foams fetuutuunai ma maʻaʻa o loʻo faʻateleina ai le tuputupu aʻe o le maketi HFO.