Understand demand at room level
A room-by-room calculation helps connect the building fabric with the heating design. Dimensions, exposed surfaces, insulation, glazing and ventilation assumptions influence the result. For refurbishment work, describe both the existing construction and the improvements that will be in place when the heating system is used.
What the assessment covers
Review heat loss through the building fabric and ventilation to establish the design heating load. The results support decisions about heat pumps, radiators and underfloor heating.
Useful starting information: dimensions, fabric build-ups, U-values, ventilation details and design temperatures.
Give the heating designer a clear basis
Identify the intended use and design conditions for each room, along with any known ventilation strategy. Highlight areas with unusual heights, extensive glazing or intermittent use. The agreed output can inform heat source and emitter decisions, while equipment selection and detailed system design must account for the proposed operating conditions.
Your questions
Can this support a heat pump project?
Yes. Heating demand is useful input to a heat pump design. Share the proposed fabric improvements and system information so the calculation basis matches the project.
Can I send drawings for an existing building?
Yes. Include dimensions and what is known about the construction. Any gaps in the evidence and the assumptions needed should be agreed before the calculation is finalised.
Building regulations and assessment routes differ across the UK. Project location, the applicable requirements and deliverables are confirmed when agreeing the scope.