Independent Underfloor Heating Design & CAD Drawings
Professional underfloor heating design for heat pumps, gas boilers and oil boilers — designed around your property, not a generic kit.
Underfloor heating should do more than make your floors feel warm. A properly designed system should provide the heat each room requires, operate at an appropriate water temperature and work efficiently with the rest of your heating installation.
Heat Loss Hub provides independent underfloor heating design services and professional CAD pipework layouts for homeowners, heating installers, builders, architects and property developers throughout the UK.
Whether you’re installing underfloor heating in a new home, renovating an existing property or extending your current heating system, we can help establish the correct design before installation begins.
Our designs consider the building’s heat losses, floor construction, insulation, floor coverings, pipe spacing, circuit lengths, flow rates and compatibility with the proposed heating system.
We don’t sell underfloor heating kits or installation materials. Our focus is on providing the technical design information needed for a successful installation.
Independent design. Professional CAD drawings. No equipment to sell.
WHY IT MATTERS
Why Professional Underfloor Heating Design Matters
A pipework layout is not the same as a complete heating design.
Many underfloor heating systems are supplied as packaged kits, often accompanied by drawings showing the proposed pipework layout.
Some suppliers provide excellent technical designs, including detailed heat loss calculations and hydraulic information. Others may rely on standard assumptions or limited property information.
The important question is whether the proposed design has been calculated to meet the heating requirements of your particular property.
A proper underfloor heating design should establish:
- How much heat each room requires.
- How much floor area is available to provide that heat.
- What water temperature is needed to achieve the required output.
- Which pipe diameter and spacing are appropriate.
- How many heating circuits are required.
- The necessary water flow rates and circuit pressure losses.
- How the system will integrate with the boiler or heat pump.
- Whether additional pumps, mixing valves or controls are necessary.
These decisions can have a significant influence on comfort, performance and running costs.
Designed to Work — or Designed to Work Efficiently?
This distinction is particularly important with heat pumps.
For example, your heat pump installer may have designed the heating system to operate at a maximum flow temperature of 40°C.
However, if the proposed underfloor heating has been calculated around a 55°C flow temperature, it may not provide sufficient heat when connected to the lower-temperature system.
Increasing the heat pump’s operating temperature could compensate for an inadequate emitter design, but it would generally reduce efficiency and increase electricity consumption.
The better approach is to coordinate the underfloor heating design with the intended operating temperature from the beginning.
The correct flow temperature should be established through calculation, not assumed because the system uses underfloor heating.
OUR SERVICES
Our Underfloor Heating Design Services
Heat Loss Hub offers flexible design services depending on how far your project has progressed and what information is already available.
1. Underfloor Heating CAD Drawings
Professional pipework layouts for projects where the heating requirements have already been established.
If you already have reliable room-by-room heat loss calculations and agreed UFH design criteria, we can provide a dedicated CAD layout service.
Depending on the project, this can include:
- Underfloor heating pipework layouts.
- Circuit identification and pipe routing.
- Proposed pipe centres and laying patterns.
- Individual circuit lengths.
- Manifold positions and circuit connections.
- Drawings suitable for use by the installing contractor.
This service is particularly suitable for heating installers, builders and contractors who already have the necessary technical calculations but require professional drawings.
2. Complete Underfloor Heating Design
A complete technical design developed around your property’s heating requirements.
For projects without an established design, we can assess the building and calculate the underfloor heating requirements before preparing the CAD drawings.
The design can include:
- Room-by-room heat loss calculations.
- Available heated floor area assessments.
- Floor construction and covering considerations.
- Required UFH heat output.
- Design flow and return temperatures.
- Pipe spacing, circuit lengths and flow rates.
- Hydraulic calculations and manifold requirements.
- Professional CAD pipework drawings.
This provides a coordinated design package rather than a pipework layout based on unverified assumptions.
3. UFH and Complete Heating System Integration
Underfloor heating designed to work with your radiators, boiler or heat pump.
Where underfloor heating forms part of a larger heating system, we can assess how the different components should operate together.
This is especially important in properties combining UFH downstairs with radiators upstairs.
Our design work can consider whether both emitter types can operate at a common flow temperature or whether separate temperature circuits are required.
We can also assess the need for additional circulating pumps, mixing arrangements, hydraulic separation and suitable heating controls.
4. Independent Underfloor Heating Design Reviews
Already received a UFH design from a supplier or installer?
We can independently review an existing design to assess whether it is suitable for the property and proposed heating system.
This can include checking the design heat losses, assumed flow temperatures, floor outputs, pipe spacing, circuit lengths and integration with the existing or proposed heating installation.
Where we identify potential problems, we can explain what needs further investigation or correction before installation proceeds.
WHAT'S INCLUDED
What's Included in Our Underfloor Heating Designs?
The documentation provided will depend on the service selected and the information available.
For a complete design, the package can include the following elements.
Room-by-Room Heat Loss Calculations
The design starts by establishing the heat required to maintain each room at its intended indoor temperature during the relevant winter design conditions.
This ensures the underfloor heating is sized around the building’s actual heating requirements rather than floor area alone.
Underfloor Heating Output Calculations
The available heated floor area is assessed against the room heat loss.
Floor coverings, insulation, construction type and water temperatures are considered when determining whether the proposed system can provide sufficient output.
Professional CAD Pipework Layouts
Detailed drawings identify the proposed pipework arrangement, heating circuits, manifold location and appropriate pipe spacing.
The objective is to give the installer a clear layout that reflects the engineering design.
Circuit Flow Rates and Hydraulic Requirements
Pipe diameter, circuit length and required flow rate influence the pressure loss through each circuit.
These factors need to be considered together to establish whether the proposed manifold and pumping arrangement can deliver the required water flow.
Design Documentation and Installation Information
The agreed design pack can include circuit schedules, design temperatures, manifold information, calculated flow rates and relevant installation notes.
The exact scope and deliverables are confirmed before design work begins, so you know what information you will receive.
BY HEAT SOURCE
Designed for Heat Pumps, Gas Boilers and Oil Boilers
Underfloor heating is not exclusive to heat pumps.
The fundamental design principles apply regardless of the heat source. Each room still requires a calculated amount of heat, and the floor must be capable of delivering it.
What changes is how the underfloor heating is integrated with the heating system.
Underfloor Heating for Heat Pumps
Heat pumps generally achieve better efficiency when supplying lower-temperature water.
A properly designed UFH system can take advantage of this by using the available floor area to deliver the required heat at relatively low operating temperatures.
However, underfloor heating is not automatically efficient simply because it is connected to a heat pump.
The floor construction, pipe layout and required heat output must support the proposed temperature.
Underfloor Heating for Gas and Oil Boilers
We also design underfloor heating for conventional gas and oil boiler installations.
Boilers may operate at higher temperatures than the underfloor heating requires, making suitable temperature control and hydraulic integration important.
Where practical, lower-temperature heating arrangements can also benefit the efficiency of condensing boilers.
The correct design depends on the boiler, existing heating circuits and proposed UFH installation.
Underfloor Heating Combined with Radiators
Many properties use underfloor heating on the ground floor and radiators upstairs.
A common assumption is that these systems must operate at different temperatures.
That isn’t necessarily true.
If the radiators and underfloor heating can both meet their room heat losses at the same design flow temperature, a common-temperature arrangement may be possible.
Where different temperatures are necessary, suitable mixing and control arrangements need to be incorporated.
We assess these requirements rather than automatically specifying additional pumps and mixing valves.
For more information, see our Underfloor Heating with Heat Pumps guide.
FLOOR CONSTRUCTIONS
Underfloor Heating for Different Floor Constructions
Different floor constructions transfer heat in different ways.
An underfloor heating system suitable for a new screeded floor may not be appropriate for a low-profile renovation or suspended timber floor.
We can assess a range of wet underfloor heating construction methods.
Traditional Screeded Underfloor Heating
Pipework installed within screed over suitable insulation is common in new homes, extensions and major renovations.
These systems offer good heat distribution and can be designed with different pipe diameters, laying patterns and spacing arrangements.
Low-Profile and Overlay Systems
Overlay systems are commonly used in existing properties where removing the original floor is undesirable.
They often use smaller pipe diameters or specially designed boards to minimise additional floor height.
Their thermal output and hydraulic limitations must be considered when selecting a suitable system.
Suspended Timber Floors
Suspended floors may use aluminium heat-distribution plates, grooved timber boards or pipework embedded within suitable infill systems between joists.
Each construction has different heat-transfer characteristics.
Insulation, pipe contact, available space and the finished floor covering all influence the achievable output.
Floor Coverings Matter
Tiles, engineered timber, laminate and carpet do not transfer heat equally.
The thermal resistance of the complete floor covering, including any underlay, affects the heat available to the room.
A system designed for tiles may need to be reassessed if the finished floor is changed to timber or carpet.
The floor construction and covering should form part of the design from the beginning — not become an afterthought once the pipework has been installed.
INDEPENDENT DESIGN
Why Choose Independent Underfloor Heating Design?
Your heating requirements should determine the design — not the products someone wants to sell.
Heat Loss Hub operates independently of underfloor heating manufacturers, merchants and installation contractors.
We don’t sell UFH kits, manifolds, pipework or other installation materials.
This allows us to consider different system types and manufacturers according to the requirements of the property.
For example, an effective design might use 100 mm pipe centres in one area, 150 mm in another and 200 mm elsewhere.
There is no universal requirement for heat pump underfloor heating to use 150 mm pipe spacing.
The appropriate spacing depends on the room’s heat loss, available floor area, floor construction, floor covering and intended operating temperature.
The same principle applies to pipe diameter, manifold design and heating controls.
Some projects benefit from individual room temperature control. Others require careful consideration of how closing multiple heating circuits could affect heat-pump operation.
Similarly, some systems need additional pumps and mixing valves, while others can operate without them.
Good design is about selecting the components the system actually requires, rather than adding complexity by default.
HOW IT WORKS
Our Underfloor Heating Design Process
We aim to make the design process straightforward, whether you’re a homeowner undertaking a renovation or an installer requiring technical support.
Step 1 – Tell Us About Your Project
Contact Heat Loss Hub with a brief description of the property and the underfloor heating you intend to install.
If you already have architectural drawings, floor plans or an existing heating design, these are useful starting points.
Step 2 – Establish the Design Requirements
We review the available information and identify anything else required.
This may include insulation specifications, floor construction details, intended floor coverings, existing radiators and the proposed boiler or heat pump.
Where sufficient accurate information is available, the design can often be undertaken remotely.
More complex projects may require additional measurements, a technical survey or clarification of construction details.
Step 3 – Heat Loss and Technical Design
For a complete design, we establish the room heating requirements before determining suitable floor outputs, water temperatures, pipe spacing and circuit arrangements.
Where heat loss calculations have already been completed, we can assess the supplied information and agree whether it is suitable for the proposed design.
Step 4 – CAD Drawings and Design Documentation
The agreed technical information is developed into professional CAD pipework drawings and supporting design documentation.
These provide the basis for the installing contractor to plan and complete the installation.
Step 5 – Design Review and Handover
We explain the key design decisions and provide an opportunity to clarify technical details before installation.
Where necessary, we can also discuss the design with your heating installer or building contractor.
WHO IT IS FOR
Who We Work With
Heat Loss Hub provides independent UFH design support for a wide range of residential projects.
Homeowners
Planning a new home, extension or renovation and wanting confidence that the proposed underfloor heating has been designed correctly.
Heating Installers
Requiring professional CAD layouts, heat loss calculations or additional design support without maintaining a dedicated in-house design department.
Builders and Main Contractors
Needing coordinated underfloor heating drawings and technical information before floor construction begins.
Architects and Building Designers
Looking to incorporate suitable underfloor heating into a building design while considering insulation, floor construction and heating performance.
Property Developers
Requiring consistent technical designs for individual homes or multiple properties, with drawings and documentation suitable for installation contractors.
We can support projects throughout England, Wales and Scotland, with many designs completed remotely from suitable architectural drawings and supporting information.
FAQ
Frequently Asked Questions
Yes. Architectural drawings provide a useful starting point for both CAD layouts and complete UFH designs.
However, floor plans alone do not establish the heating requirements of the property.
For a full design, we also need sufficient information about the building construction, insulation, heat losses, available heated floor area and intended floor coverings.
Where details are missing, we will identify what is needed before completing the calculations.
A reliable room-by-room heat loss calculation is an essential input for a complete UFH design.
It establishes how much heat each room requires and allows the proposed floor system to be assessed against that requirement.
Without this information, it is difficult to establish the correct water temperature, pipe spacing and achievable room output.
We can provide the heat loss calculation as part of the design service where required.
No.
There is no universal pipe spacing that is correct for every heat pump installation.
The appropriate spacing depends on the required heat output, available floor area, floor construction, pipework and design water temperature.
Some rooms may require closer pipe centres than others. In certain circumstances, improving the building insulation or providing an additional heat emitter may be more appropriate than simply installing more pipework.
Yes.
We can assess the UFH alongside existing or proposed radiators to establish whether the different heating circuits can operate at compatible temperatures.
Where separate temperatures are required, the design can consider suitable mixing, pumping and control arrangements.
The objective is to produce a heating system that works together rather than treating the underfloor heating and radiators as unrelated installations.
Not necessarily.
Many traditional UFH manifolds incorporate a separate pump and thermostatic mixing valve, particularly where they are connected to higher-temperature boiler circuits.
However, these components are not automatically necessary for every installation.
For example, a low-temperature heating system may be able to supply suitable UFH circuits directly, subject to the heat source, required flow rates, available pump head, controls and hydraulic design.
We assess the requirements of the complete system before recommending an arrangement.
Yes.
If you have drawings or calculations from a UFH supplier or installation contractor, we can independently assess the design against the available property information.
This can be particularly valuable before installation, when changes to pipe spacing, circuit arrangements or operating temperatures are still relatively straightforward.
No.
Heat Loss Hub is an independent heating design consultancy.
We provide technical calculations, design advice and CAD drawings, but we do not sell underfloor heating equipment or undertake installation work.
You are free to use your preferred supplier and suitably qualified installation contractor.
The cost depends on the property size, available information and level of design required.
A straightforward CAD pipework layout based on existing calculations is a different service from a complete design involving room-by-room heat losses, hydraulic calculations and integration with a heating system.
We review each enquiry and provide a quotation based on the agreed scope of work.
GET STARTED
Request Your Underfloor Heating Design
Get the design right before the floor is finished.
Underfloor heating pipework is often installed beneath screed, tiles or other permanent floor finishes.
Once the floor is complete, correcting a poorly designed system can be difficult, disruptive and expensive.
Whether you’re planning a new installation, extending an existing heating system or reviewing a design supplied by someone else, Heat Loss Hub can help establish the technical requirements before installation begins.
Our independent design services can help you understand:
- Whether the proposed UFH can meet your room heating requirements.
- The appropriate pipework layout, spacing and circuit arrangements.
- The water temperatures required for the system to operate.
- How the UFH should integrate with your boiler, heat pump or radiators.
- What information your installation contractor needs to complete the work.
Tell us about your project and, if available, provide your architectural drawings or existing UFH design.
We’ll review the information and explain which design service is most appropriate.
Independent advice. Professional heating design. No equipment to sell.
Alternatively, email hello@heatlosshub.co.uk with your project details.