Frequently Asked Questions -Â
What is a heat loss calculation?
A heat loss calculation measures how much heat each room in a property loses during cold weather. It is used to determine the correct size of a heating system and ensure that radiators, underfloor heating and heat pumps are properly specified.
Why is a heat loss calculation important?
Without an accurate heat loss calculation, a heating system may be oversized or undersized. Oversized systems can be less efficient and more expensive, whilst undersized systems may struggle to maintain comfortable temperatures.
Do I need a heat loss calculation before installing a heat pump?
Yes. A heat loss calculation is a fundamental part of heat pump design and is required for MCS-compliant installations. It ensures the heat pump is correctly sized for the property.
Can you carry out a heat loss calculation from plans?
Yes. We can provide full room-by-room heat loss calculations from architectural drawings and construction specifications for new builds, extensions and renovation projects.
Do you visit the property?
For existing properties, a site visit may be required depending on the information available. For new builds and projects with detailed plans, calculations can often be completed remotely.
What information do you need?
Typically we require architectural drawings, floor plans, elevations, construction details and any available insulation specifications.
Can you design a heat pump system before the property is built?
Yes. In many cases, designing the system from plans is preferable because it allows the heating system to be properly integrated into the project from the outset.
Do I need a heat loss calculation for a heat pump?
Yes. Accurate heat loss calculations are essential for selecting the correct heat pump and designing an efficient heating system.
Can you work from PDF plans?
Yes. Most projects are completed using PDF architectural drawings and construction specifications.
Do you install heat pumps?
No. We are an independent consultancy specialising in heat loss calculations, heat pump design, EPCs and retrofit assessments.
How long does the design process take?
Timescales vary depending on project complexity, but most residential designs are completed within a few working days of receiving the required information.
Heat Pump Design
What is included in a heat pump design?
Our heat pump design service includes:
Room-by-room heat loss calculations
Heat pump sizing
Radiator sizing
Underfloor heating assessment
Design flow temperatures
Hot water cylinder sizing
System design documentation
Are your heat pump designs MCS compliant?
Our designs are produced using recognised industry methodologies and provide the information installers require to meet MCS design requirements.
Do you install heat pumps?
No. Tawai Consulting is an independent consultancy. We provide impartial technical assessments and designs but do not sell or install heating equipment.
Why use an independent heat pump designer?
As an independent consultancy, we have no interest in selling a particular manufacturer or installation package. Our recommendations are based solely on the property's requirements.
Solar PV Surveys
What is a solar PV survey?
A solar PV survey assesses whether a property is suitable for solar panels. It considers roof orientation, roof area, shading, energy usage and potential electricity generation.
Can you tell me how many solar panels I need?
Yes. We can assess your property and estimate the most suitable solar PV system size based on your available roof space and energy consumption.
Are solar panels suitable for older properties?
Many older properties are suitable for solar PV installations. The suitability depends on roof condition, orientation, structural considerations and shading.
Can solar panels work with a heat pump?
Yes. Solar panels and heat pumps are often an excellent combination, helping to reduce electricity costs and improve overall energy efficiency.
Do you assess battery storage options?
Yes. We can advise on the potential benefits of battery storage based on your energy consumption patterns and solar generation estimates.
EPCs and Energy Assessments
What is an EPC?
An Energy Performance Certificate (EPC) rates the energy efficiency of a property and provides recommendations for improvement.
When do I need an EPC?
An EPC is usually required when selling, letting or constructing a property.
How long is an EPC valid?
An EPC is normally valid for ten years unless significant changes are made to the property.
Are your EPCs officially registered?
Yes. All EPCs are lodged on the national EPC register in accordance with current regulations.
Retrofit Assessments
What is a Retrofit Assessment?
A Retrofit Assessment is a detailed survey of a property's condition, energy performance and occupancy. It forms part of the PAS 2035 retrofit process.
When is a Retrofit Assessment required?
A Retrofit Assessment is often required when applying for government-backed energy efficiency schemes or undertaking PAS 2035-compliant retrofit projects.
What does the assessment involve?
The assessment typically includes:
Property inspection
Occupancy assessment
Energy performance review
Building condition survey
Ventilation assessment
Service Areas
Which areas do you cover?
We provide services across:
Suffolk
Norfolk
Essex
We can also undertake remote design work throughout the UK where suitable information is available.
How long does a survey take?
Survey times vary depending on property size and complexity. Most residential surveys are completed within a few hours, with reports typically issued within a few working days.
How do I request a quotation?
You can contact Tawai Consulting by phone or the contact us page, with details of your project. We will provide a tailored quotation based on your requirements.