A TRNSYS model was developed to integrate photovoltaic/thermal collector (PV/T) in a roof and coupled with Air Source Heat Pump (ASHP) in an Archetype Sustainable House (ASH). The heat pump uses the warm air generated in the Building Integrated Photovoltaic-Thermal Collector (BIPV/T) as the source for heat production. The coupling of BIPV/T and ASHP enables a highly efficient heating system in winter conditions. The developed TRNSYS model was simulated for different regions to predict the seasonal performance of the heat pump. The results from the simulation were used to estimate the saving in energy and cost as well as to predict the electricity related greenhouse gas (GHG) emission reduction potential from the PV panels. The results showed that annual GHG emission due to electricity demand by the ASHP was reduced by 225 kg CO2 for ASHP + PV/T.The annual electricity cost credit from PV production based on Time-of-Use (TOU) and the reduction in electricity cost of the heat pump when connected with PV/T systems was calculated and compared with the cost of working the heat pump alone. The results showed that there was a saving of $500 in annual electricity bills and GHG emission credit of 1734.7 kg CO2 from renewable electricity generation. (C) 2014 Elsevier B.V. All rights reserved.