Match the calculation to how the building is used
Hot water demand is affected by the number of users, the outlets available and when they are used. A residential building and a commercial facility can have very different demand patterns. Explain peak periods, operating hours and the activities drawing hot water rather than relying only on total floor area.
What the assessment covers
Consider occupancy, outlets and expected usage patterns to assess hot water demand. Use the findings to inform storage volume, recovery requirements and system design.
Useful starting information: building use, occupancy, outlet schedule, demand profile and proposed hot water system.
Consider storage and recovery together
Share the proposed heat source, storage arrangement and any space constraints. Storage volume and recovery capacity need to be considered alongside the demand profile. If an existing system struggles at peak times, describe the problem and provide available equipment information so the assessment can focus on the relevant operating scenario.
Your questions
What should I include with an enquiry?
Building use, occupancy, outlet quantities, expected usage periods and available details of the proposed or existing hot water equipment.
Can hot water and heating demand be assessed together?
Yes. Describe both requirements at enquiry stage so the calculation scopes and assumptions can be coordinated.
Building regulations and assessment routes differ across the UK. Project location, the applicable requirements and deliverables are confirmed when agreeing the scope.