Involved in the transformation of 5-formyl tetrahydromethanopterin (5-formyl-H(4)MPT) to methanofuran (MFR) and formate via the formylmethanofuran (formyl-MFR). May be catalyze the hydrolysis of formylmethanofuran (formyl-MFR) to yield formate and MFR. H2O + N-formylmethanofuran = formate + methanofuran Binds 2 Zn(2+) ions per subunit. One-carbon metabolism; formaldehyde degradation; formate from formaldehyde (H(4)MPT route): step 4/5. Octaheteromer. Part of the formyltransferase/hydrolase complex fhc; composed of FhcA, FhcB, FhcC and FhcD. Belongs to the metallo-dependent hydrolases superfamily. FwdA/FmdA family.