Architects & Retrofit Coordinators

Specify with confidence. Eliminate redesign risk.

HydroTop™ gives architects and retrofit coordinators a reliable, specification-ready solution for properties where conventional heat pump placement is not viable.

The Specification Challenge

The constraint that keeps coming up.

For architects and retrofit coordinators working on domestic retrofit, the heat pump external unit is a persistent design problem. On constrained sites, conservation area properties and terraced stock, finding a compliant location for an external unit can cause significant design iteration, or result in heat pump being excluded from the specification entirely.

Specifying HydroTop™ from the outset removes this constraint. With the unit housed within the roof void, the external design challenge disappears, and with it, the risk of late-stage redesign or value engineering.

Why Specify HydroTop™

Designed to work within your process.

Planning-friendly

Designed to meet Class C and Class G of the GPDO. In most cases no planning application is required, including many conservation area settings.

Minimal visual impact

A 150mm aluminium cap, colour-matchable to the surrounding roof.

Technical documentation

Full specification documents and compliance information provided.

PAS2035 compatible

Supports retrofit coordinator compliance requirements directly.

OEM neutral

Works with major heat pump manufacturers up to 10kW.

Conservation area experience

Specialised support available for sensitive heritage contexts.

CPD & Technical Support

We support your team.

We plan to offer CPD-accredited technical presentations on HydroTop™ for architectural practices and retrofit coordinator teams in the near future, covering the product, the regulatory context, specification guidance and case studies.

In the meantime, we provide direct technical support for individual projects, including specification review, planning submission support and liaison with our installation network.

If you are working on a project where conventional heat pump placement is proving problematic, get in touch. We can usually provide an initial feasibility view quickly and without obligation.
Request Technical Support
Architectural detail of a roof-integrated installation
Get In Touch

Ready to find out more?

Get in touch with our team to discuss how HydroTop™ could work for your programme or project.