Introduction: The International Finance Corporation (IFC) is seeking expressions of interest from qualified consultants (firm) to develop a model for delivering a sustainable; affordable; and reliable heating and cooling system in Turkiye using 5th Generation Networked Ground Source Heat Pumps (NGSHP) technology.Background: Heating and cooling are critical components of global energy consumption; representing approximately half of the total final energy use. This sector surpasses both electricity and transport in terms of energy demand and is a significant contributor to energy-related CO2 emissions. The majority of heat production originates from fossil fuels; alongside a portion coming from unsustainable biomass sources. Despite a decline in the reliance on fossil fuels for heat generation; the sector remains a major concern for environmental sustainability.Turkiye has a complex energy landscape; characterized by a high dependency on imported fossil fuels; rising energy demands; and urgent need for decarbonization.5th Generation Networked Ground Source Heat Pumps (NGSHP) are innovative heating and cooling systems that use low-temperature ground loops shared among multiple buildings. Unlike earlier systems; they operate at ambient temperatures; reducing thermal losses and requiring minimal energy for temperature adjustments. Their efficiency lies in harnessing renewable thermal energy; decentralizing heating and cooling; and enabling simultaneous heating and cooling exchanges between buildings. This approach minimizes energy waste; cuts carbon emissions; and reduces operational costs.IFC is developing a project aimed at creating a model to deliver a sustainable; affordable and reliable heating and cooling system in Turkiye using NGSHP for heating and cooling.Project Scope: The project will be executed in phases; with Phase 1 focusing on the development of a work package that provides a feasibility analysis and identification of potential sites for the deployment of a utility-scale (3;000-30;000 housing/commercial units) NGSHP system in Turkiye. This work package will be instrumental in the procurement of design engineering services and eventually construction services to deploy the network as well as in the pursuit of funding sources to support the continuation of this work. The assignment is expected to have the following workstreams:1. Workstream 1: Feasibility Analysis - The Consultant will assess the feasibility of deploying a NGSHP system within Turkiye. The purpose of this workstream will be to identify the primary success factors (both from an economic and technical standpoint) for the deployment of the technology and to develop a set of screening criteria. These criteria should be used to inform site identification work.a) Technical feasibility will involve the review and analysis of the potential performance of a network of ground sourced heat pumps in Turkiye.b) Economic / financial feasibility will involve analysis of the potential economics of NGSHP deployment in the country. Specifically; a review of the estimated installation costs for a district scale system that could serve on the order of 10;000-30;000 household equivalents.2. Workstream 2: Site Identification - The Consultant will identify specific potential locations (region; city; and neighborhood) for the deployment of NGSHP systems in Turkiye. These proposed locations should take in to account the previously determined success factors and screening criteria from Workstream 1. The intent of Workstream 2 is a more detailed analysis for specific areas in order to identify the best candidate for design work. Stakeholder outreach will also be a critical component of Workstream 2. Engagement with local commercial customers; municipalities; and local government will drive the identification of viable loop routes. Qualification criteria: The selected Consultant should possess strong technical expertise and experience for undertaking high-level feasibility studies; GSHP performance analysis; energy market analysis and cost projections. Prior experience working on heat pump projects and district energy type systems is desirable. Consultants should also be able to provide past projects completed and references for similar projects to the outlined scope.International consultants or consultants located outside of the Turkiye; should have a local partner and the details should be included in the EOI.