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Heat Pump Design Support for Installers
Flexible technical design support behind your installation business.
- Last updated: September 2026
- Heat Loss Hub · For Installers
Heat Loss Hub provides independent heat pump design support for installers across the UK.
Use us for a single room-by-room heat loss calculation, a difficult system design, temporary overflow work or as an ongoing outsourced design resource behind your business. You choose how much of the design process you want to keep in-house and how much you want us to handle.
We can support you with:
- Room-by-room heat loss calculations
- Heat pump sizing and selection
- Radiator and heat emitter sizing
- Underfloor heating design
- Design flow temperature
- Pipework and hydraulic design
- Flow rate and pressure-loss calculations
- Cylinder and hot water sizing
- System schematics and design documentation
- Design checking and technical review
- Remote survey and project-data collection
Heat Loss Hub does not sell heat pumps and does not need to steer a design towards a particular manufacturer or merchant.
KEY TAKEAWAY
The starting point is the property and the heating system it needs.
GET IN TOUCH
Discuss which parts of the design process you want to keep in-house, and which you want Heat Loss Hub to take on.
Explore: The Remote Design Programme
What Can Heat Loss Hub Take Off Your Desk?
Heat pump installation businesses do not all need the same level of support. Some installers are comfortable completing the survey and system design but want room-by-room heat loss calculations produced accurately and consistently. Others want the whole technical design handled so their team can concentrate on surveying, quoting and installing.
You can use Heat Loss Hub for individual parts of the process or combine them into a complete design service.
Heat Loss Calculations
Room-by-room design heat losses based on the property construction, dimensions, ventilation assumptions and local design conditions.
If this is all you need, see our Outsourced Heat Loss Calculations for Installers.
Heat Pump Sizing and Selection
The heat pump should be selected against the calculated building load and the output the exact model can deliver at the intended outdoor and flow temperatures.
The model number on the casing is not the design output.
Radiator and Emitter Design
We can assess existing radiators, calculate required room outputs and identify where emitters need replacing or increasing. This can include radiator schedules, towel rails and underfloor heating.
Pipework and Hydraulics
Where required, the design can extend beyond heat loss and emitters to the water side of the system, including:
- Required flow rate
- Pipe sizing
- Pressure loss
- Available pump head
- Minimum flow requirements
- Water volume
- Hydraulic separation
- Buffer or volumiser requirements
Hot Water and Cylinder Design
Domestic hot water should be considered as part of the heating-system design rather than simply choosing a cylinder by litre capacity. Support can include:
- Cylinder sizing
- Coil suitability
- Heat pump compatibility
- Reheat performance
- Household hot-water demand
- Plant-space considerations
Design Review and QA
If you already produce your own designs, Heat Loss Hub can provide an independent technical review before the system reaches site. That can be particularly useful for unusual properties, higher flow temperatures, complicated hydraulics or designs your team is not completely comfortable with.
Choose the Level of Support You Need
You do not have to outsource the whole job.
Heat Loss Only
You complete the survey and provide the property information. Heat Loss Hub produces the room-by-room heat loss calculation and whole-property design load.
This works well for installers who are comfortable completing the rest of the system design themselves but want the calculation work taken off their desk.
Explore: Outsourced Heat Loss Calculations
Heat Loss + Emitters
We calculate the room loads and assess the heat emitters required at the chosen design flow temperature. This can include existing-radiator checks, replacement sizes and underfloor heating requirements.
Full Technical System Design
For installers wanting more comprehensive support, the design can extend through:
- Room-by-room heat loss
- Design flow temperature
- Heat pump sizing and selection
- Radiator and UFH requirements
- Pipework and hydraulics
- Flow rates
- Hot water and cylinder sizing
- Agreed schematics and design documentation
Explore: Outsourced MCS Heat Pump Design
Design Review
You produce the design. Heat Loss Hub checks it. This can provide an independent technical second opinion before equipment is ordered or installation begins.
Who Is Installer Design Support For?
Small Heating Companies
You may have the installation experience but not want to spend evenings completing calculations and producing design paperwork. Heat Loss Hub can provide the technical design resource without you employing a full-time designer.
Growing MCS Installers
As installation volume increases, design capacity can quickly become the bottleneck. Outsourcing part of the design process allows your survey and installation teams to keep moving without letting the technical work build up behind them.
Established Heat Pump Businesses
Even companies with internal design capability can need extra support during busy periods, staff holidays or unusually complex projects. Heat Loss Hub can act as overflow capacity without changing the way your company normally operates.
Installers Developing Their Heat Pump Offering
If you are newer to heat pumps, independent technical design support can help you deliver early projects while your own internal design capability develops.
The installer remains responsible for their own certification, installation and compliance obligations. Heat Loss Hub provides the agreed technical design service behind the project.
What You Send Us
The information required depends on the service being provided, but typically includes:
- Property address
- Floor plans where available
- Room dimensions
- Ceiling heights
- Wall, floor and roof construction
- Window and door information
- Existing radiator dimensions and types
- Underfloor heating details
- Existing pipework information
- Cylinder location
- Proposed heat pump location
- Electrical information where relevant
- Survey photographs
- Survey videos
- Preferred equipment where applicable
KEY TAKEAWAY
Better survey information produces better design information. That is why we are also developing a structured remote-survey process to make the handover between surveyor, customer and designer more consistent.
What Comes Back
Depending on the level of support selected, your project can include:
- Room-by-room heat loss calculation
- Whole-property design heat load
- Recommended design flow temperature
- Radiator or emitter schedule
- Underfloor heating requirements
- Heat pump sizing assessment
- Heat pump selection support
- Required system flow rate
- Pipework design calculations
- Hydraulic assessment
- Cylinder and hot-water assessment
- System-design notes
- Schematics or drawings where included
- Technical design documentation
- Design-review comments
The exact deliverables are agreed before the project starts.
How Heat Loss Hub Fits Into Your Workflow
The aim is not to take control of your installation business. It is to remove the design bottleneck.
A typical project can work like this:
- Survey. You or your surveyor collect the required property and system information.
- Submit. The project information, measurements, photographs, videos and plans are sent to Heat Loss Hub.
- Design. We complete the agreed calculation and design work.
- Review. Any missing information or design questions are resolved before the final documents are issued.
- Install. Your company continues with procurement, installation, commissioning and project completion.
KEY TAKEAWAY
The technical design becomes one part of your existing process rather than a separate business relationship with your customer.
Your Customer Stays Your Customer
Outsourcing design should not mean outsourcing your customer relationship.
Heat Loss Hub works as the technical resource behind your company. Depending on the arrangement, design work can be produced for use within your own project workflow and may be supplied in your company name where agreed.
We do not need to:
- Sell equipment to your customer
- Quote for the installation
- Replace your company in the customer relationship
- Push a particular manufacturer
- Move the project into an umbrella scheme
KEY TAKEAWAY
Your customer stays your customer. Your installation stays your installation. We provide the agreed design support behind it.
WHITE-LABEL DESIGN SUPPORT
Design support that sits entirely behind your own customer relationship — supplied in your company name where agreed.
Independent of Manufacturers and Merchants
Some design services exist primarily to support equipment sales. Heat Loss Hub works differently. We do not need the answer to be a particular heat pump before the design begins.
The sequence should be:
Property → Heat loss → Emitters → Flow temperature → System requirements → Heat pump
not:
Heat pump → Make the property fit it
Manufacturer preferences can still be accommodated where the installer or customer has a preferred product, but the equipment should be checked against the actual design conditions. Independent design support is particularly useful when comparing different manufacturers or when a project sits close to the performance limits of a particular model.
Remote Survey and Design Support
One of the biggest problems with outsourced design is not the calculation itself. It is getting complete and consistent survey information to the designer.
Missing radiator dimensions, unclear construction, poor photographs or forgotten plant-space details can delay a project and create unnecessary revisits.
Heat Loss Hub is developing a structured remote-survey process designed to improve this handover. The process can collect information such as:
- Property measurements
- Construction details
- Windows and doors
- Radiators
- Underfloor heating
- Existing pipework
- Cylinder location
- Heat pump location
- Electrical routes
- Loft information
- Photographs
- Videos
KEY TAKEAWAY
The objective is simple: collect the information the designer needs before the design begins. This can be used by an installer, surveyor or homeowner depending on the project.
Design Support That Grows With Your Workload
You do not need to commit to outsourcing every project. Heat Loss Hub can support:
One difficult project — send a project where the heat loss, emitters, hydraulics or system design needs a second pair of eyes.
Temporary overflow — use external design support during busy periods rather than allowing surveys and installations to queue behind your design team.
Staff absence — maintain design capacity during holidays, sickness or recruitment gaps.
Regular project volume — if outsourcing works for your business, it can become part of your normal workflow.
An outsourced design department — for smaller companies, Heat Loss Hub can provide much of the technical resource of an internal design function without the cost of employing a dedicated designer.
Use us for one project or make Heat Loss Hub part of your normal design workflow.
Installer Design Services
Explore the individual services available to heat pump installers.
Outsourced Heat Loss Calculations
Room-by-room calculations for installers who want to keep the remaining system design in-house.
Outsourced MCS Heat Pump Design
Comprehensive technical system-design support for installers wanting more than heat loss alone.
White-Label Heat Pump Design
Technical design support that sits behind your own customer relationship.
Remote Heat Pump Survey
A structured survey-to-design process for collecting the information required before design begins.
Radiator Sizing for Installers
Room-by-room emitter assessment and radiator schedules for heat-pump systems.
Heat Pump Hydraulic Design
Flow rates, pipework, pressure loss and hydraulic system requirements.
Cylinder Sizing & Hot Water Design
Cylinder and domestic-hot-water assessment for heat-pump installations.
Heat Pump Design Review
Independent QA and technical review of designs produced by your own team or another designer.
INSTALLER DESIGN GUIDES
Explore the Installer Content Library
Outsourced Design & Support
Considering outsourcing, or want to understand your options? These guides cover white-label design, overflow support and the in-house vs outsourced decision.
Heat Pump Design Guides
The technical core: MCS design packs, room-by-room heat loss, radiator and pipe sizing, hydraulic design, cylinder selection and design review.
- What Should an MCS Heat Pump Design Pack Include?
- Room-by-Room Heat Loss Calculations for MCS Installers
- Radiator Sizing Service for Heat Pump Installers
- Heat Pump Pipe Sizing Service for Installers
- Heat Pump Hydraulic Design Service for Installers
- Heat Pump Cylinder Sizing & Selection Service for Installers
- Heat Pump Design Review for Installers
Remote Survey Guides
Learn how to collect the property, emitter, pipework, plant, electrical, photographic and video information needed for an accurate remote design.
Frequently Asked Questions
Yes. You can use Heat Loss Hub for a single part of the design process or for a much wider system design. If you only need room-by-room heat losses, there is no requirement to outsource the rest of the project.
Yes. Depending on the agreed scope, design support can include heat loss, emitters, flow temperature, heat pump selection, pipework, hydraulics, hot water and supporting design documentation.
White-label and installer-branded workflows can be discussed depending on the service required. The aim is to support your business rather than replace your customer relationship.
No. Heat Loss Hub is independent of heat-pump manufacturers and merchants. If you have a preferred manufacturer or product range, those units can be assessed against the project requirements.
The exact requirements depend on the service, but typically include property dimensions, construction information, openings, emitter details, plant locations and supporting photographs or videos. A clear project-data checklist is agreed before work starts.
Yes, where the plans contain sufficient information. New-build and renovation projects can often be designed substantially from drawings, although additional construction or system information may still be required.
Yes. Design review can be used where you have already completed the calculation or system design but want an independent technical check before installation.
Not unless that forms part of an agreed process. For installer design work, Heat Loss Hub can operate behind your company so you retain control of the customer relationship.
Yes. Support can range from occasional projects to regular outsourced design volume. For repeat work, the objective is to create a consistent survey, handover and design process rather than starting from scratch on every project.
Heat Loss Hub already works with heat-pump design and project platforms including Spruce and Heat Engineer. Where practical, we can agree a workflow that fits alongside the systems your business already uses.
Need More Design Capacity?
Whether you need one room-by-room heat loss calculation, help with a difficult system or regular outsourced design support, Heat Loss Hub can provide the technical resource behind your installation business.
Tell us which part of the design workflow you want to take off your desk.
DISCUSS INSTALLER DESIGN SUPPORT
Get in touch to talk through which parts of your design workflow you want to keep in-house and which you want to hand over.
Explore: Outsourced Heat Loss Calculations