The kinetics of the gas phase recombination reaction HO + HO2 + He -> HOOOH + He has been studied between 200 and 600 K by using the SACM/CT model and the unimolecular rate theory. The molecular properties of HOOOH were derived at the CCSD(T)/aug-cc-pVTZ ab initio level of theory, while relevant potential energy features of the reaction were calculated at the CCSD(T)/aug-cc-pVTZ//CCSD(T)/aug-cc-pVDZ level. The resulting high and low pressure limit rate coefficients are k(infinity) = 3.55 x 10(-12) (T/300)(0.20) cm(3) molecule(-1) s(-1) and k(0) = [He] 1.55 x 10(-31) (T/300)(-3.2) cm(3) molecule(-1) s(-1). The rate coefficients calculated over the 6 x 10(-4) - 400 bar range are smaller at least in a factor of about 60 than the consensus value determined for the main reaction channel HO + HO2 -> H2O + O-2, indicating that the recombination pathway is irrelevant.