Inbox Thermal Solutions

Inbox Thermal Solutions is the exclusive UK partner for HydroTop™ heat pump solutions, a revolutionary system that houses an air-source heat pump within the roof void. This innovative design makes heat pump installation viable in millions of UK homes, including terraced properties, conservation areas, and homes with limited external space, overcoming common barriers such as noise objections and planning restrictions. The HydroTop™ system is prefabricated, insulated, and installed between roof rafters, with only a low-profile aluminium cap projecting above the roof surface, often falling under Permitted Development.

It is compatible with all major heat pump manufacturers up to 10kW, ensuring flexibility for installers and programme managers. The company focuses on market development, regulatory certification, and building an installer ecosystem for the UK market, offering a managed end-to-end installation delivery service. Inbox Thermal Solutions works with a variety of clients, including social housing providers, local authorities, retrofit aggregators, ESCOs, architects, retrofit coordinators, and heat pump installers.

They provide a fully managed delivery model for social housing and local authorities, unlocking hard-to-treat stock and reducing abortive costs. For architects and retrofit coordinators, HydroTop™ offers a reliable, specification-ready solution that eliminates redesign risk. Heat pump installers can extend their capabilities by offering HydroTop™ for previously unviable jobs, accessing programme work and receiving full technical training and support.

The company is actively progressing UK certification, including BROOF(t4), Building Regulations, and MCS engagement, to support large-scale deployment.