Heat Engineer has been designed to help heating engineers and surveyors gather information about a property for the installation of a heating system. The options available for heat loss reports are renewable technologies such as Air Source Heat Pumps, Ground Source Heat Pumps, Biomass or conventional fossil fuels.

Please visit our website to create an account and watch our training videos.

Heat Engineer Software Ltd is an Industrial Associate Supporter of the Chartered Institute of Plumbing & Heating Engineering.

----Heat Engineer has three functions ----

1 - Heat Loss survey, designed to meet BS EN 12831, CIBSE Domestic Heating Design Guide and MCS standards. When the survey is completed you can send it to your account at

2 - MCS 020 Planning Standards, sound assessment for Air Source Heat Pumps.

3 - A quick heat loss estimator tool.

-----Important useful feature----
Every entry made is automatically saved in the app’s history so you can revisit any time to amend either your sound assessment or heat loss survey. For MCS 020 Sound assessments this is particularly useful if you don’t know the sound power decibel rating whilst on site and haven’t yet decided which manufacturer to use. You can use the app on site to record data you have and revisit your history to update the project once you’re back in the office.

1----Heat Loss Survey----

Complete a site survey for a room by room heat loss calculation. The parameters within this app are detailed so calculations can be carried out following the domestic heating design guide and requirements to meet MCS standards. This tool is for collecting details of a property so you can then send it to an online Heat Engineer account. If you are a Heat Engineer account holder at then you can review your survey and produce a detailed heat loss report.

• Pre-populated drop down lists for room names and options to add custom names.

• Pre-populated drop down lists and options to add custom description and U values for all building materials, walls, floors, windows, doors, ceilings and roof.

• For ‘complex rooms’, rooms with lofted/vaulted ceilings and roof an option to select which image profile, so measurement and wall types can quickly be entered.

• Current Emitter selection, quickly select the radiator profile image from our list and enter the height and length. Heat Engineer online will calculate the output based on the designed flow temperature in the final report.

• Send completed survey to a Heat Engineer account online at

• Surveys submitted for the heat loss calculation the ‘internal room design temperatures’ and ‘air changes per hour ‘will be based on the room name and age of the room. Energy kWh demand and running costs is calculated using degree day data. Fuel comparisons are also available.

2----MCS 020 Planning Standards, sound assessment for Air Source Heat Pumps-

To ensure a proposed Air Source Heat Pump installation is a ‘permitted development’ for sound conditions use this app if you’re an MCS installer for the handover pack.

• Enter any manufacturer and model name
• Enter the A weighted sound power (dB) level for the chosen model (you can change this information in the history when you decide which model you want to install)
• Enter a description of assessment position
• Take and add a photo of the assessment position for your final PDF report
• A clear indication of assessment results
• Send a two page PDF report of the completed MCS 020 assessment to your office via email

3----Heat Loss Estimator----

This heat loss estimator tool has been designed to provide heating estimations on Power kW and Energy kWh demands for domestic and commercial properties. The tool provides approximations to aid the quotation / tendering process before a project is accepted.

What’s New

Version 2.0

We've added a quick to use heat loss estimator tool, which has the ability to compare different results for a given project. You can copy a survey, make some changes for a different scenario and see the results in a bar chart format. Has the option for either domestic or commercial.

Ratings and Reviews

5.0 out of 5
3 Ratings

3 Ratings

Nsrxr00 ,

Must have Heatloss software

This is a must have heat loss program for the professional heating installer, no other program comes close to delivering as comprehensive data and levels of customisation for different heating types from heatpumps to gas boilers, Rob and his team are constantly adding new features to make it more useful and adapt to the ever changing world of heating design 👌

Developer Response ,

Thanks for your feedback, cheers Rich.

Tomliv ,

Easy to use & good support

Very simple to use. Good support and training. Heat loss for each room is well presented once I have submitted the survey to my account online. Looking forward to using it more often.

Wishywoshi ,

Excellent app

Excellent app that I would recommend to any heating engineer looking for a quick and easy solution to being more accurate in sizing up the perfect system.

App Privacy

The developer, Heat Engineer Software Ltd, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary based on, for example, the features you use or your age. Learn More


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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