The questions that reveal design quality, consumer protection and aftercare. This guide explains the decision points without promising that one answer fits every property.
Ask for the design basis
A credible proposal should explain heat loss, design temperature, emitters, flow temperature, hot water and controls.
For ask for the design basis, connect the explanation to current credentials, design ownership, consumer protection and aftercare. The written scope should show the practical consequence for comfort, space, disruption, controls or cost, and identify any item that still needs confirmation. Pay particular attention to badge-only claims, vague exclusions and missing commissioning responsibility; this is where an apparently simple comparison can become misleading. Ask who owns the calculation, enabling work, commissioning and aftercare, then keep certification checks, written scope and handover commitments so later adjustment or fault finding begins with evidence.
Verify the grant route
BUS is installer-led and requires the correct MCS pathway. Ask for current certification and consumer-code details before signing.
For verify the grant route, connect the explanation to current credentials, design ownership, consumer protection and aftercare. The written scope should show the practical consequence for comfort, space, disruption, controls or cost, and identify any item that still needs confirmation. Pay particular attention to badge-only claims, vague exclusions and missing commissioning responsibility; this is where an apparently simple comparison can become misleading. Ask who owns the calculation, enabling work, commissioning and aftercare, then keep certification checks, written scope and handover commitments so later adjustment or fault finding begins with evidence.
Look beyond handover day
Clarify commissioning evidence, warranties, service arrangements, fault support and who owns each part of the design.
For look beyond handover day, connect the explanation to current credentials, design ownership, consumer protection and aftercare. The written scope should show the practical consequence for comfort, space, disruption, controls or cost, and identify any item that still needs confirmation. Pay particular attention to badge-only claims, vague exclusions and missing commissioning responsibility; this is where an apparently simple comparison can become misleading. Ask who owns the calculation, enabling work, commissioning and aftercare, then keep certification checks, written scope and handover commitments so later adjustment or fault finding begins with evidence.
The practical next step
Use the guidance in How to choose a heat-pump installer to ask better questions, then base the final decision on room-by-room heat loss, emitter output, site constraints and a written design. Renewable Heating Hampshire can help turn the general principle into a property-specific assessment.
