You normally start by checking the basic requirements and arranging a technical assessment with an SEAI-registered heat pump contractor. The contractor can advise whether your home and heating system may be suitable, while you submit the grant application before any work begins. If the application is approved, the installation must be completed by an eligible registered contractor within the stated timeframe, followed by submission of the required documents for payment. Grant amounts and eligibility depend on your property and circumstances, so check the latest guidance on the official SEAI website.