Heat Pump Design for Developers
Independent heat-pump system design for individual new builds, small developments and multi-plot housing projects.
Heat Loss Hub provides the technical heating design independently of the installation contractor, giving the project team a defined design basis before installation begins.
That can include:
- room-by-room heat-loss calculations
- heat-pump sizing and selection
- radiator and underfloor-heating design
- low-temperature system design
- pipework and hydraulic design
- cylinder sizing
- control strategy
- system schematics
- installer design packs
- commissioning requirements
Define what the heating system needs to achieve before the installation contractor starts building it.
This gives developers, architects and contractors a clear technical specification to work from and a reference against which the completed installation can later be checked.
WHO IS THIS SERVICE FOR?
Who Is This Service For?
Heat Loss Hub can support:
- small residential developers
- regional housebuilders
- bespoke new-build projects
- architects and architectural technologists
- main contractors
- project managers
- developers working across repeated house types
- project teams that want the heating design completed independently of the installer
The same design principles apply whether the project is one bespoke dwelling or a multi-plot development with repeated house types. The level of coordination and documentation simply changes with the scale of the project.
WHY INDEPENDENT DESIGN HELPS
Why Independent Heat Pump Design Helps
When the heating design is left entirely to the installation tender stage, different contractors can approach the same project in very different ways. One installer may propose:
- one building heat-loss figure
- one heat-pump size
- one flow temperature
- one radiator schedule
- one cylinder
- one hydraulic arrangement
Another may propose something completely different. That makes quotations difficult to compare because the contractors are not necessarily pricing the same technical solution.
Independent design changes the sequence. Instead of:
Installer quote → installer design → installation
the project can follow:
Project design → defined specification → contractor quotation → installation
That gives tendering contractors a clearer common basis to price against. It also means the heating design does not automatically disappear or change if the installation contractor changes.
THE PROCESS
Define → Design → Specify → Install → Verify
A developer heat-pump project can be thought of in five stages.
DEFINE
Establish the building requirements and project constraints.
This can include:
- architectural information
- building fabric
- room requirements
- glazing
- ventilation
- site location
- heating strategy
- plant space
- service routes
DESIGN
Develop the technical heating system.
This can include:
- room-by-room heat loss
- heat-pump sizing
- emitter sizing
- flow-temperature strategy
- hydraulic design
- hot-water design
- controls
SPECIFY
Turn the design into something the project team and installer can use.
This can include:
- equipment schedules
- emitter schedules
- system schematics
- pipe-sizing information
- design temperatures
- control requirements
- commissioning targets
INSTALL
The selected contractor installs against the agreed technical design. Where site conditions require changes, the design can be reviewed rather than altered informally without a clear record.
VERIFY
Commissioning and installation information can then be compared with the original design intent. This creates a traceable line from design to installation to commissioning.
TIMING
When Should Heat Loss Hub Get Involved?
The earlier the heating design is considered, the more opportunity there is to influence the building rather than trying to make the heating system fit around decisions that have already been made.
Concept or Early Design Stage
Useful for identifying:
This can include:
- likely plant requirements
- cylinder space
- outdoor-unit locations
- emitter strategy
- service routes
- potential design constraints
Technical Design Stage
This is where the main heating calculations and system design are developed.
Pre-Construction
The design can be finalised into schedules, schematics and installer information.
Construction Stage
Where the project changes, the heating design can be reviewed and revised in a controlled way.
Commissioning and Handover
The finished system can be checked against the design requirements and intended operating conditions.
THE SCOPE
What Can We Design?
Room-by-Room Heat Loss
The heating requirement can be calculated for each room using the proposed building fabric, glazing, ventilation and design conditions. This establishes the basis for the rest of the system design.
Heat Pump Sizing and Selection
The selected heat pump should be considered against the actual building load and the relevant operating conditions. A nominal model name alone is not enough. The design should consider the output available from the exact unit at the required outdoor and water temperatures.
Radiators and Underfloor Heating
Emitters should be selected against the room-by-room heating requirement and the intended system temperatures. This may involve radiators, underfloor heating, or mixed systems.
Underfloor Heating CAD Design
For developments requiring detailed underfloor heating layouts, Heat Loss Hub also provides professional UFH CAD drawings and technical calculations. These can be commissioned as part of a complete heating design or as a separate service where the heat source and building heat losses have already been established.
Low-Temperature Heating Design
Flow temperature influences emitter size, system efficiency, heat-pump performance and system design. It should therefore be considered as part of the design rather than treated as a setting to decide at commissioning.
Pipework and Hydraulics
The heating system must be able to move the required heat around the property. The design may consider water flow, pipe sizing, circulation pumps, valves, hydraulic separation, buffers or volumisers where appropriate, and system layout.
Cylinder Sizing
Domestic hot-water demand should be considered alongside occupancy, property size, usage assumptions, heat-pump capability, cylinder recovery and available space.
Controls and Operating Strategy
The design should also consider how the completed system is intended to operate. This may include weather compensation, zoning, heating schedules, domestic hot-water priority, system controls and commissioning settings.
DESIGN FROM PLANS
Heat Pump Design From Architectural Plans
Many new-build projects can be designed primarily from architectural and technical information. Useful information may include:
- floor plans
- elevations
- sections
- construction details
- wall, floor and roof build-ups
- U-values
- window schedules
- site location
- proposed plant locations
- proposed heating strategy
Where information is missing, it should be identified rather than hidden behind assumptions. A good design should make clear what is known, what has been assumed, and what still needs confirmation.
BEFORE TENDER
Heat Pump Design Before Tender
One of the strongest reasons to complete the heating design independently is to create a clearer basis for contractor quotations. Instead of asking several installers to each invent their own system proposal, the developer can establish the technical requirements first.
Contractors can then price against:
- the same design load
- the same emitter requirements
- the same flow-temperature basis
- the same cylinder requirement
- the same hydraulic intent
- the same design documentation
That does not remove contractor input. It simply means the tender comparison starts from a more consistent technical basis.
PROJECT SCALE
Single Plot, Small Development or Multi-Plot Scheme
The design approach can be adapted to the scale of the project.
Individual New Build
Suitable for bespoke houses, one-off developer projects and architect-led homes.
Small Development
Suitable for several plots, mixed house types, boutique developments and phased construction.
Multi-Plot Development
Suitable for repeated house types, standard specifications, multiple phases and larger residential schemes.
MULTI-PLOT DESIGN
Standardising Repeated House Types
COORDINATION
Coordinating the Heating Design With the Building
Heat pumps should not be treated as equipment that is simply added after the architectural design is finished. The heating design can influence:
- cylinder cupboard size
- plant space
- outdoor-unit location
- service access
- primary pipe routes
- building penetrations
- UFH build-up
- radiator positions
- defrost-water drainage
- electrical provision
- control locations
Early coordination can prevent otherwise avoidable compromises later in the project.
DELIVERABLES
What Does the Developer Receive?
The exact deliverables depend on project scope, but a developer design package may include:
- room-by-room heat-loss report
- whole-property design heat load
- design temperatures
- heat-pump selection
- relevant manufacturer operating-point information
- radiator schedule
- UFH design criteria
- cylinder specification
- system schematic
- pipe-sizing information
- hydraulic design notes
- design flow temperature
- control strategy
- equipment schedule
- commissioning requirements
- design revision information
- installer design pack
The purpose is to give the project team more than a single heat-loss figure or equipment recommendation. It should provide a technical basis that can be followed through construction.
TRACEABILITY
Design Value → Installed Value → Commissioned Value
A useful project design should make it possible to compare what was intended with what was eventually installed.
| Design requirement | Installation check | Commissioning evidence |
|---|---|---|
| Heat-pump model and output | Correct unit fitted | Operating behaviour |
| Design flow temperature | Controls installed | Actual settings |
| Radiator schedule | Correct emitters fitted | Room performance |
| Hydraulic schematic | Installed arrangement | Flow evidence |
| Cylinder specification | Correct cylinder fitted | DHW operation |
| Control strategy | Correct controls fitted | Commissioned settings |
This helps create a clear technical trail through the project.
EQUIPMENT SELECTION
Product-Neutral Equipment Selection
Heat Loss Hub is not tied to selling one heat-pump manufacturer. The equipment selection can therefore begin with building load, operating temperature, hot-water requirement, project constraints, required output, modulation, available space and manufacturer performance data.
The aim is to select equipment to suit the project rather than shape the project around a predetermined product.
DESIGN CHANGES
Managing Design Changes
New-build projects change. Possible changes include:
- revised window specifications
- different insulation products
- altered room layouts
- changed plant positions
- moved radiators
- different cylinders
- changed heat-pump models
- customer upgrades
- plot variations
Where those changes affect the heating system, the design should be reviewed. A controlled revision process helps prevent several different versions of the same design circulating between the developer, contractor and site team.
STANDARDISATION
What Can Be Standardised — and What Still Needs Checking?
Can be standardised
- design methodology
- equipment families
- repeated emitter schedules
- house-type schematics
- commissioning requirements
- documentation format
May still require plot-specific review
- orientation
- exposure
- glazing
- fabric changes
- end conditions
- client variations
- site-specific constraints
Standardisation should reduce unnecessary repetition without replacing engineering judgement.
COMMISSIONING
Commissioning Requirements Should Start With the Design
Commissioning should not be the point where the operating strategy is invented. The design can establish the intended basis for:
- system water flow
- design flow temperature
- weather-compensation settings
- pump arrangement
- balancing
- domestic hot-water strategy
- control behaviour
The commissioning engineer can then work toward defined design requirements rather than starting without a clear target.
CONTINUITY
Design Continuity if the Contractor Changes
Developments do not always use the same contractor from start to finish. A project may:
- be re-tendered
- use different contractors on different phases
- change installer partway through
- split work between several teams
Where the heating design belongs to the project rather than the installation contractor, the technical basis can remain consistent. A new contractor does not necessarily mean starting the heating design again.
SECOND OPINION
Already Have a Heat Pump Design?
SCOPE
Scope of the Service
Heat Loss Hub provides heating-system design. Depending on the project, this may interact with other disciplines, but it does not automatically include:
- SAP assessment
- Building Regulations approval
- structural design
- electrical-system design
- planning
- formal acoustic assessment
- building-control sign-off
Where another specialist is required, that should be identified clearly.
STANDARDS
Design Quality and Industry Standards
The aim is to provide a rigorous, documented heat-pump design based on the actual requirements of the building. That means considering:
- room-by-room heat demand
- design conditions
- heat-pump performance
- emitter output
- operating temperatures
- hydraulics
- domestic hot water
- controls
- commissioning requirements
Where a project needs to align with a particular standard, specification or client requirement, that can be considered as part of the design brief. The focus remains on producing a technically defined system that the project team can understand and the contractor can install against.
DEVELOPER DESIGN GUIDES
Explore Developer Heat Pump Design Services
Design Services
Can Heat Loss Hub design or review this project for us?
GET IN TOUCH
Discuss Your Development
Tell us about the project and we will review it personally — usually within two working days.
QUESTIONS
Frequently Asked Questions
Can you design a heat-pump system from architectural plans?
Yes. Many new-build designs can be developed from architectural and technical information such as floor plans, elevations, sections, construction details and glazing information. Any missing information should be identified before the design is finalised.
Can the design be completed before an installer is appointed?
Yes. One of the main benefits of independent design is that the technical heating requirements can be established before the installation contractor is selected.
Can installers tender against the design?
Yes. The design can provide a common technical basis against which contractors can prepare their quotations. The contractor still remains responsible for their own pricing, installation scope and delivery.
Can you design more than one plot?
Yes. Projects can range from a single property to developments containing repeated or varied house types. The scope can be structured around the size and complexity of the development.
Can repeated house types share one design?
Much of the design can sometimes be standardised, but individual plots may still need review for differences such as exposure, orientation, glazing or design changes. The objective is to avoid unnecessary repetition without assuming every property is identical.
Can you review a design produced by somebody else?
Yes. An independent review can assess an existing proposal before construction or installation.
Do you specify heat-pump models?
Where equipment selection forms part of the agreed scope, specific models can be assessed against the project requirements and manufacturer performance information.
Do you size radiators and underfloor heating?
Yes, where included within the project scope. Emitter design should be based on the heating requirement of each room and the intended operating temperatures.
Do you provide hydraulic schematics?
System schematics and hydraulic design information can form part of the design package, depending on project scope.
Can the design be revised if the construction changes?
Yes. Where changes affect the heating system, the relevant parts of the design can be reviewed and revised.
Do you provide commissioning requirements?
Commissioning requirements can be included so the contractor understands the intended system flow, temperatures, controls and operating strategy.
Can the installer use a different manufacturer?
Potentially. Any proposed substitution should be checked against the design requirements rather than assumed to be equivalent.
Does the service include SAP or Building Regulations sign-off?
Not automatically. Heat Loss Hub provides heating-system design. SAP assessment, Building Regulations approval and other specialist services remain separate unless specifically included within the agreed project scope.
READY WHEN YOU ARE
Planning a New Build or Housing Development?
Heat Loss Hub can provide an independent heat-pump design package from architectural information through to installer documentation and commissioning requirements. The objective is to give the project team a clear technical basis before installation starts. That can help you:
- coordinate the heating system earlier
- compare contractor quotations against a more consistent specification
- standardise repeated house types
- manage design revisions
- give installers clear technical information
- retain design continuity if contractors change
- check the completed system against the original design intent
Whether you are working on one property or a larger residential development, the first step is to review the project information and agree the design scope.