Monitoring evaluates whether a new or renovated building performs as intended under real operating conditions. The Passive House Institute recommends a two-year monitoring programme to ensure reliable long-term performance evaluation.

Energy efficiency of the Passive House Standard: Expectations confirmed by measurements in practice
Post-Occupancy Monitoring for Performance Verification
Measurement concept, disturbance variables and suitable solutions
Tool: Monitoring Tool
Video: Renovations: outPHit simplifies monitoring

The monitoring approach needs to account for different variations and applications, here we list the different methods:

// Overview of consumption measurements. This diagram summarises the measured heat consumptions from four housing estates, a low-energy settlement (left) and three Passive House settlements.//

In all circumstances, the actual weather conditions (outdoor temperature, global radiation) and the indoor temperature should also be entered in the adjusted balance calculation. These influences can have a great effect on the heating demand. Monitoring heat consumption: Calculation and Demand

Uncertainties in Energy Balance Calculations
Reasons for discrepancies between predicted and actual heating energy consumption
Fact sheet: Comparison of heating energy demand according to the PHPP and consumption
Fact sheet: Heating energy consumption - expectations confirmed by measurements in practice

Basic measurement setup for testing airtightness

Air tightness (blower door) tests measure how airtight a building is and are important for Passive House certification. They help find and fix leaks in the building envelope, improving construction quality and ventilation performance. The test uses a fan to create pressure and detect leaks, preventing drafts and potential structural damage.

Airtightness and airtightness measurement
Airtightness test
Airtightness Measurement of High-Rise Buildings

Here is the list of iPHA factsheets
Airtightness or walls do not "breathe"!
Airtightness: Practical Solutions
Measuring airtightness: tips for protocol tests
Airtightness measurements in high-rise buildings
Air permeability of OSB composite wood panels
Multifunctional expanding tape for airtight window installation

In large buildings, substantial data is already collected through Building Automation and Control Systems (BACS) and visualized via Building Management Systems (BMS). If performance evaluation and verification requirements are considered from the beginning, costs can be reduced.

Instrumentation and Controls for Buildings in Passive House Standard
Building automation
Potential energy savings through building automation
Building automation for energy-efficient buildings
Building automation for non-residential Passive House buildings
Webinar: Control paradigms for non-residential Passive House buildings
Fact Sheet: Building automation for non-residential Passive House buildings

Complex building projects often need detailed thermal analysis, especially for large glazing, special constructions, or strict indoor comfort requirements. The Passive House Institute’s Dynbil tool provides this kind of dynamic simulation for research and consulting, including summer comfort checks. It models heat, ventilation, solar gains, and moisture with high time resolution to predict building performance accurately.

Infrared thermography shows heat radiation to visualize surface temperatures of building components. It helps identify heat losses, insulation quality, thermal bridges, and air leaks. However, it requires expertise and is mainly used for qualitative assessment of a building’s thermal envelope.

Materials and devices can be tested in a climate chamber with two controlled zones that simulate precise temperature and humidity conditions. This allows their performance, reliability, and durability to be evaluated under realistic conditions.

To assess a building’s performance, a clear definition of “performance” must first be established. A practical approach is to evaluate the quality of living, focusing on thermal comfort and indoor air quality. Accordingly, monitoring and assessment methods should capture both indoor environmental conditions and energy consumption ; building efficiency can then be expressed as the relationship between living quality and energy use.

Post-Occupancy Monitoring for Performance Verification
outPHit Monitoring procedure

Monitoring focuses on critical parameters including total energy use, indoor temperature, relative humidity, and CO₂ concentrations. These measurements help evaluate how renovations improve building performance and create healthier, more comfortable indoor environments. Additionally, ventilation system efficiency and microbiological air quality indicators are assessed to capture a comprehensive picture of indoor living conditions.

Collected data is systematically formatted and stored in a centralised database, facilitating uniform evaluation across projects. Advanced algorithms process the data to detect trends, irregularities, and overall building performance, enabling informed decisions for further optimisation and certification of verified energy efficiency.

Even when only very limited data are available, such as utility bills and meter readings, some assessments of building performance can still be undertaken. Minimal Monitoring offers a simple approach to evaluating energy consumption and identifying the optimization.

Measurements for checking consumption – "Minimal Monitoring"
Verification of energy consumption via "minimal monitoring"

Decades of monitoring experience and extensive measured data consistently demonstrate that Passive House buildings deliver exceptional energy efficiency, comfort, and reliability, while also supporting ongoing research and innovation in sustainable building design.

Residentaial building monitoring
Research reports: Residential building
Article: Monitoring of the "Good Energy House", Minneapolis, Minnesota, USA

Non-residentail building monitoring (Passive Houes district, large Passive House buildings, non-residentail buildings)
Research reports: Non-residential building
Monitoring of Passive House schools built with modular timber construction (German)
Article: Monitoring in the Passive House district of Bahnstadt, Heidelberg
Article: Realizing a large scale monitoring project in 300 apartments
Fact Sheet: Building automation for non-residential Passive House buildings

Retrofits monitoring
Research reports: Residentail retrofits
Articls: Monitoring of the Passive House indoor swimming pool in Lünen
Fact sheet: outPHit Verified Performance – monitoring made easy

Airtightness monitoring
The list of all the relevant fact sheets can be found below:
Airtightness or walls do not "breathe"!
Airtightness: Practical Solutions
Measuring airtightness: tips for protocol tests
Airtightness measurements in high-rise buildings
Air permeability of OSB composite wood panels
Multifunctional expanding tape for airtight window installation

Energy consumption monitoring
The list of all the relevant fact sheets can be found below:
Comparison of heating energy demand according to the PHPP and consumption
Heating energy consumption - expectations confirmed by measurements in practice

Planning monitoring
Research: Monitoring of planning and construction in a selected project: Energy efficient detached house in Königsfeld

Monitoring reports

Certification as Quality Assurance

Refurbishment with Passive House components

List of Research Group for Cost-effective Passive Houses proceedings

Technical literature, project reports and guides from the Passive House Institute