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Heat Pump Design Support for Small Installers
Professional design support without building a design department.
- Last updated: September 2026
- Heat Loss Hub · For Installers
If you are a one-man band or small heating business, heat-pump design can become a second job on top of the first one.
During the day you may be:
- Surveying
- Quoting
- Installing
- Commissioning
- Ordering equipment
- Dealing with customers
Then the design work starts afterwards.
Heat Loss Hub provides flexible technical design support for small installers who need help without employing a full-time designer or committing to a fixed monthly workload.
Use the service for one job, an occasional difficult project or regular design support when the work is there.
KEY TAKEAWAY
One project is enough.
GET IN TOUCH
Send us one project and we’ll agree the design scope before work begins — no commitment beyond that.
When Every Role Belongs to the Same Person
Large installation companies can split work between surveyors, designers, office staff and engineers. Small businesses often cannot.
The same person may be responsible for:
- Surveying the property
- Producing the quotation
- Calculating the heat loss
- Sizing the radiators
- Selecting the heat pump
- Ordering equipment
- Installing the system
- Commissioning it
- Completing paperwork
- Answering customer questions
That can turn a normal working day into two shifts. The installation finishes. Then the laptop comes out.
KEY TAKEAWAY
Heat Loss Hub can take some of the technical design work out of that second shift. Outsourcing design gives back one of those roles without employing another person.
You Do Not Need Enough Work for a Full-Time Designer
A small heating company may install only a few heat pumps each month. Some months may be busy. Others may not contain a single heat-pump project. That can make a permanent internal design role difficult to justify.
Building your own complete design function can also involve more than a salary. Depending on how the business operates, there may be:
- Design software subscriptions
- Training
- CAD or drawing tools
- Document-production time
- Technical administration
- Time spent keeping up with changing products and requirements
For a business with irregular project volume, using external design support can be a more flexible option. You pay for the design resource when the project exists. You do not need to build the whole infrastructure before the workload justifies it.
Send One Job, Ten Jobs or None This Month
Small businesses do not always have predictable project volumes. Heat Loss Hub can be used around that reality.
One Project
If you have one heat-pump job that needs design support, send one project.
Several Projects Arrive Together
Use Heat Loss Hub to take part of the workload when surveys start arriving faster than you can design them.
A Quiet Month
If there is nothing to send, there is nothing to send.
Seasonal Workload
Use external design support during the parts of the year when your heat-pump workload increases.
KEY TAKEAWAY
Use the service when the workload exists. You do not need to create work just to justify having access to a designer.
Keep Straightforward Jobs In-House
Outsourcing does not need to be all or nothing. You may prefer to retain simple projects yourself and send only the ones that need more time or technical attention. For example:
Straightforward property — you complete the design internally.
Mixed radiators and underfloor heating — send the project to Heat Loss Hub.
Difficult pipework — get additional hydraulic support.
Unusual heat pump selection — ask for a second opinion.
Three surveys arrive in the same week — send the overflow.
Customer asks for a complex redesign — use Heat Loss Hub for that project only.
This means you can keep developing your own design capability without allowing difficult jobs to consume disproportionate amounts of time.
Support While You Build Your Own Heat-Pump Capability
Many small heating businesses moving into heat pumps already have years of experience with heating systems, pipework, cylinders, controls, radiators, installation and commissioning.
The newer part may be the design process around low-temperature heating. That can include:
- Room-by-room heat loss
- Flow-temperature design
- Corrected emitter output
- Heat-pump performance at design conditions
- Hydraulic requirements
- Minimum flow
- Hot-water reheat performance
Using external design support does not mean the installer lacks competence. It can simply mean choosing where to use specialist resource while experience develops.
KEY TAKEAWAY
Heat Loss Hub can provide technical design support while you continue building your own capability. Over time you may choose to bring more work in-house, or you may decide that outsourcing design continues to make more sense for your business. Both approaches are valid. Design support can be a bridge while your own heat-pump capability grows.
What Can Heat Loss Hub Take Off Your Desk?
You can outsource one part of the design or a much wider package.
Room-by-Room Heat Loss
Heat-loss calculations for individual rooms and the complete property.
Explore: Outsourced Heat Loss Calculations
Radiator and Emitter Sizing
Assessment of existing radiators and sizing of replacement emitters at the intended design flow temperature.
Full Heat-Pump System Design
A broader technical package can include heat loss, emitters, flow temperature, heat-pump sizing, hydraulics, hot water and supporting documentation.
Explore: Outsourced MCS Heat Pump Design
Hydraulic Design
Support with flow rates, pipe sizing, pressure loss, pump head and system hydraulic requirements.
Cylinder and Hot-Water Design
Assessment of cylinder size, coil performance and hot-water demand.
Design Review
If you produce your own design but want another pair of eyes on it, Heat Loss Hub can independently review the project.
You decide which parts of the work you want to keep.
A Second Pair of Eyes on Your Survey
Large installation companies may have office staff or technical teams checking surveys before the design starts. A small installer often does not.
If something is missed on site, the same person who surveyed the job may only discover the problem later when they sit down to design it. Common missing information can include:
- Room dimensions
- Ceiling heights
- Window sizes
- Construction details
- Radiator type
- Radiator dimensions
- Existing pipe sizes
- Loft insulation
- Cylinder dimensions
- Proposed heat pump position
- Electrical route
- Plant-space photographs
Where Heat Loss Hub is completing the design, the project information can be checked before the calculation proceeds. If something important is missing, it can be identified before assumptions become embedded in the final design.
This is also one of the reasons we are developing a more structured remote-survey process for installers.
Keep the Customer Relationship Personal
For a small installer, the customer relationship is often one of the strongest parts of the business. The customer may have met you personally, asked you to survey the property, received the quotation from you, chosen your company because they trust you and expected you to carry out the installation.
Outsourcing part of the technical design should not weaken that relationship. Heat Loss Hub can work behind your business while you remain the customer-facing installer. Where appropriate, design outputs can also be supplied for use within your own branded workflow.
Heat Loss Hub does not need to:
- Sell equipment to your customer
- Quote for their installation
- Take over the customer relationship
- Market other services directly to them
Your customer remains your customer.
Cover When Life Gets in the Way
One of the vulnerabilities of a very small business is that there may be no spare capacity when something changes. A week of illness can create a backlog. A family commitment can remove an evening you expected to use for design. A large installation can consume the whole week. A holiday can leave several surveys waiting.
External design support can provide another route when your own time suddenly disappears. Typical situations might include:
- Holiday cover
- Illness
- Family commitments
- Large installation projects
- Unexpected survey volume
- Delayed recruitment
- A temporary backlog
- Several quotations needing technical work at once
You do not need a permanent arrangement for temporary problems.
Avoid Building Unnecessary Software and Admin Overhead Too Early
Heat-pump design can involve several different tools depending on how far the design goes. That may include software for heat-loss calculations, heat-pump selection, radiator sizing, hydraulic calculations, drawings, project management and documentation.
If your project volume is still relatively low, it may not make sense to build an entire internal design stack immediately.
Heat Loss Hub can provide access to technical design resource while your business grows. If the workload eventually becomes large enough to justify bringing more design work in-house, you can make that decision then. There is no need to build the infrastructure before you need it.
Three Common Small-Installer Scenarios
Scenario 1 — One Heat Pump This Month
You have one installation to design. There is no reason to commit to regular outsourced design just to complete a single job.
Send the project. We agree the scope. You receive the design support required.
Scenario 2 — Three Jobs Arrive Together
Normally you manage the design yourself. This month, three surveys arrive within a few days and the installation diary is already full.
Keep whichever jobs you want internally and send the overflow to Heat Loss Hub.
Scenario 3 — One Project Is Much More Complicated Than Usual
Most of your projects are relatively straightforward. Then you survey a property with mixed UFH and radiators, restricted pipe routes, high room heat losses, unusual hydraulic requirements and a difficult cylinder location.
You do not need to outsource every design just because one project is difficult. Send the difficult one.
Start With One Project
You do not need to commit to a new way of running your business. Start with one job.
That first project allows us to establish what survey information is available, what design work you want completed, what additional information is required, how documents should be returned, whether you want Heat Loss Hub visible to the customer and how revisions should be handled.
Once the project is complete, you can decide whether the service is useful to your business. If it is, send another project when you need support. If your workload becomes quiet, stop.
It really can be that simple.
SEND US ONE PROJECT
Send one project and we’ll agree the design scope and information required before work begins.
Frequently Asked Questions
Yes. A small installer can use Heat Loss Hub for a single project, occasional technical support or regular design work. You do not need a large monthly installation volume.
Yes. One project is enough. There is no need to commit to sending multiple jobs before trying the service.
The service is designed to accommodate different installer workloads. You may need support regularly, occasionally or only when a difficult project appears.
Yes. You decide which projects or parts of the design process you want to outsource. You may keep simple work internally and send Heat Loss Hub only complex projects or temporary overflow.
Yes. If room-by-room heat loss is the only part you want completed externally, that can be provided as a standalone service.
Yes. Depending on the agreed scope, support can extend through heat loss, emitters, heat-pump selection, hydraulics, hot water and technical documentation.
Not necessarily if the design work is being outsourced. The exact software requirements depend on which parts of the process you intend to keep within your own business.
Yes. Some installers may use Heat Loss Hub while developing their own internal design capability. You can compare outputs, ask technical questions and gradually decide which parts of the process you want to bring in-house.
Yes. Heat Loss Hub can operate behind your business so you retain the customer-facing relationship.
White-label workflows can be agreed where appropriate. Explore White-Label Heat Pump Design Services.
If required information is missing or unclear, this should be identified before the design is finalised. This is one of the reasons a structured survey handover is useful.
Yes. External design support can be used around the workload of your business rather than requiring you to maintain a design department when the work is not there.
Need Design Support Without Building a Design Department?
You do not need to become a large heat-pump company before you can access proper technical design resource.
Send one project. Keep the jobs you want to design yourself. Use Heat Loss Hub when workload, complexity or time makes external support useful. Then stop or start again as your workload changes.
SEND US ONE PROJECT
Send one project and we’ll take it from there — no commitment to send another.
Explore: Heat Pump Design for Installers