Home > News > Decarbonisation > Industry Q&A: Grant UK on air source heat pumps Gary Muir, Ian Lawley and Craig Payne, Regional Specification Managers at Grant UK, discuss market trends, challenges in heat pump specification, and how they support specifiers in delivering successful projects. Q: Can you provide an overview of your role at Grant UK? Gary: At the end of 2024, Grant UK expanded its sales team to include a dedicated New Build and Social Housing Specification Team.