Documentation:<\/strong> Sources, assumptions, calculations, controls, and approvals.<\/li>\n<\/ol>\nWhat does emissions reporting produce?<\/strong><\/p>\nA suitable reporting process produces:<\/p>\n
\n- Total greenhouse gas emissions in kilograms or tonnes of CO\u2082e.<\/li>\n
- Emissions by heat pump, site, building, region, or company.<\/li>\n
- Scope 1, Scope 2, and relevant Scope 3 results.<\/li>\n
- Operational and lifecycle emission breakdowns.<\/li>\n
- Refrigerant-related emissions.<\/li>\n
- Electricity-related emissions.<\/li>\n
- Emissions-intensity indicators.<\/li>\n
- Data-quality ratings.<\/li>\n
- A record of emission factors and calculation versions.<\/li>\n
- Evidence that supports environmental claims and disclosures.<\/li>\n<\/ul>\n
What emissions reporting is not<\/strong><\/p>\nEmissions reporting is not the same as energy monitoring. An energy monitoring system records quantities such as kilowatt-hours, temperatures, heat output, and operating hours. Emissions reporting adds boundaries, classifications, emission factors, calculation rules, quality controls, and disclosure requirements.<\/p>\n
It is also not the same as a carbon footprint. A carbon footprint is the quantified climate impact inside a defined boundary. Emissions reporting is the process used to calculate, document, update, and communicate that footprint.<\/p>\n
<\/span>Core purpose of emissions reporting<\/span><\/h2>\nThe core purpose of emissions reporting is to create a consistent and decision-useful account of greenhouse gas emissions. The report should show both environmental performance and the reliability of the underlying data. This allows different users to understand and compare the results.<\/p>\n
A good reporting system supports four management needs:<\/p>\n
\n- Measurement:<\/strong> Determine the amount and source of emissions.<\/li>\n
- Control:<\/strong> Detect inefficient operation, leaks, missing data, or calculation errors.<\/li>\n
- Decision-making:<\/strong> Prioritize maintenance, electrification, renewable electricity, or equipment replacement.<\/li>\n
- Disclosure:<\/strong> Answer regulatory, customer, investor, procurement, and supply-chain requests.<\/li>\n<\/ul>\n
From operating data to business decisions<\/strong><\/p>\nA raw electricity reading does not show the complete climate effect of a heat pump. The reading must be linked to a location, period, energy source, contractual arrangement, and approved emission factor. Refrigerant events and backup heating must also be considered.<\/p>\n
The reporting system converts this fragmented information into a management record. That record can show whether emissions changed because of operating efficiency, weather, electricity generation, refrigerant leakage, building use, or portfolio growth.<\/p>\n
The final outcome supports practical decisions such as:<\/p>\n
\n- Repairing a system with abnormal electricity use.<\/li>\n
- Investigating repeated refrigerant top-ups.<\/li>\n
- Comparing heat pumps across buildings.<\/li>\n
- Selecting lower-impact refrigerants.<\/li>\n
- Procuring suitable electricity products.<\/li>\n
- Setting an emissions-reduction target.<\/li>\n
- Preparing a customer or sustainability disclosure.<\/li>\n
- Verifying a claimed reduction against a baseline.<\/li>\n<\/ul>\n
<\/span>Why emissions reporting is needed<\/span><\/h2>\nHeat pump environmental performance is often communicated through efficiency ratings, coefficients of performance, renewable-energy claims, or estimated CO\u2082 savings. These indicators are useful, but they do not replace an emissions inventory. They may omit actual electricity consumption, refrigerant losses, backup heating, or lifecycle impacts.<\/p>\n
The need for emissions reporting increases when an organization operates several systems. Meter data may sit in one platform, service records in another, and electricity invoices in a third. Without a common method, different teams can produce different figures for the same asset.<\/p>\n
Common business problems<\/strong><\/p>\nOrganizations frequently face the following problems:<\/p>\n
\n- Electricity use is available, but no approved emission factor is recorded.<\/li>\n
- Heat pump and building loads are combined in one electricity meter.<\/li>\n
- Refrigerant service records are stored outside the sustainability system.<\/li>\n
- Backup heating is not separated from heat pump operation.<\/li>\n
- Different countries use different electricity factors.<\/li>\n
- Emission factors change from one reporting year to the next.<\/li>\n
- Renewable electricity claims are not linked to supporting evidence.<\/li>\n
- Purchased equipment emissions are mixed with operating emissions.<\/li>\n
- Avoided emissions are deducted from the corporate inventory.<\/li>\n
- Historical figures cannot be reproduced after data or factors change.<\/li>\n<\/ul>\n
Emissions reporting creates a controlled process for resolving these issues. It establishes who owns the data, which method applies, and how corrections are handled.<\/p>\n
Regulatory and supply-chain pressure<\/strong><\/p>\nCompanies within the scope of the EU Corporate Sustainability Reporting Directive report sustainability information using the European Sustainability Reporting Standards. The European Commission adopted revised ESRS on 3 July 2026. As of 28 July 2026, those revised standards remain subject to the applicable European Parliament and Council scrutiny process, with intended application from financial year 2027 and optional early use for financial year 2026. Companies should therefore verify the legally applicable ESRS version for their reporting year.<\/p>\n
Small and medium-sized companies can also receive emissions-data requests from larger customers, banks, landlords, public buyers, or group companies. The European Commission\u2019s voluntary sustainability reporting standard for SMEs is designed to help smaller companies respond to these information requests in a structured way.<\/p>\n
Heat pump operators must also distinguish greenhouse gas inventory reporting from refrigerant compliance. Regulation (EU) 2024\/573 establishes requirements for fluorinated greenhouse gases. Depending on the equipment and applicable thresholds, obligations can include qualified personnel, leak prevention, leak checks, records, recovery, and end-of-life handling. These records are important emissions-reporting inputs, but they do not form a complete corporate greenhouse gas inventory on their own.<\/p>\n
<\/span>Emission sources in a heat pump environment<\/span><\/h2>\nA heat pump transfers thermal energy from air, ground, or water to a building or process. An all-electric heat pump does not normally burn fuel at the point of operation. However, electricity generation and refrigerant losses can still create greenhouse gas emissions.<\/p>\n
The relative importance of each source varies. It depends on heat pump efficiency, electricity demand, electricity generation, climate, building load, system controls, refrigerant type, leakage rate, and equipment life.<\/p>\n
Typical emission-source map<\/strong><\/p>\n<\/div>\n\n
\n\n\n| Emission source<\/th>\n | Typical activity data<\/th>\n | Typical treatment for a heat pump operator<\/th>\n<\/tr>\n<\/thead>\n |
\n\n| Purchased electricity<\/td>\n | Imported electricity in kWh<\/td>\n | Scope 2 in an organization-level inventory<\/td>\n<\/tr>\n |
\n| Upstream electricity and grid losses<\/td>\n | Electricity use and upstream factors<\/td>\n | Relevant Scope 3 category when included by the selected method<\/td>\n<\/tr>\n |
\n| Refrigerant leakage<\/td>\n | Kilograms of refrigerant emitted<\/td>\n | Scope 1 when the equipment is owned or controlled<\/td>\n<\/tr>\n |
\n| Gas or oil backup heating<\/td>\n | Fuel quantity or energy content<\/td>\n | Scope 1 when combusted in owned or controlled equipment<\/td>\n<\/tr>\n |
\n| Electric backup heater<\/td>\n | Electricity in kWh<\/td>\n | Included with purchased electricity<\/td>\n<\/tr>\n |
\n| Purchased heat pump equipment<\/td>\n | Supplier product data, EPD, mass, or spend<\/td>\n | Scope 3 capital goods under a corporate inventory<\/td>\n<\/tr>\n |
\n| Maintenance and replacement parts<\/td>\n | Supplier data, quantities, transport<\/td>\n | Relevant Scope 3 categories<\/td>\n<\/tr>\n |
\n| Waste and refrigerant recovery<\/td>\n | Waste quantities and treatment routes<\/td>\n | Relevant Scope 3 categories<\/td>\n<\/tr>\n |
\n| Leased heat pump systems<\/td>\n | Electricity, refrigerant, and contract data<\/td>\n | Classification depends on ownership, control, and lease treatment<\/td>\n<\/tr>\n |
\n| Use of heat pumps sold by a manufacturer<\/td>\n | Expected lifetime electricity, refrigerant loss, and product life<\/td>\n | Scope 3 use of sold products for the manufacturer<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\nUnder the GHG Protocol, refrigerant leakage from owned or controlled refrigeration and air-conditioning equipment is treated as a direct fugitive emission. Purchased capital equipment can be reported in Scope 3 capital goods, while the expected lifetime use of electricity-consuming and refrigerant-containing products can be relevant to a manufacturer\u2019s Scope 3 use-of-sold-products calculations. Lease classification depends on the selected organizational boundary and lease arrangement.<\/p>\n This classification is typical rather than universal. The final treatment must follow the selected standard, organizational boundary, ownership structure, and reporting purpose.<\/p>\n <\/span>Key features of an emissions-reporting system<\/span><\/h2>\nA reliable emissions-reporting system requires more than a final CO\u2082e number. It must control the complete information chain from the heat pump to the published result.<\/p>\n The key features are:<\/p>\n \n- A defined reporting boundary.<\/li>\n
- A complete emission-source register.<\/li>\n
- Consistent scope and category classification.<\/li>\n
- Reliable activity-data collection.<\/li>\n
- Controlled emission factors and GWP values.<\/li>\n
- A defined electricity-accounting method.<\/li>\n
- Refrigerant-event accounting.<\/li>\n
- Baselines and performance indicators.<\/li>\n
- Data-quality and uncertainty controls.<\/li>\n
- A reproducible calculation record.<\/li>\n
- Separate treatment of inventories, avoided emissions, and offsets.<\/li>\n
- Suitable management and disclosure outputs.<\/li>\n<\/ol>\n
Defined reporting boundary<\/h3>\nDefinition.<\/strong> The reporting boundary states what the report includes. It identifies the organization, buildings, heat pumps, operating period, greenhouse gases, emission scopes, and lifecycle stages. It also records material exclusions.<\/p>\nPurpose.<\/strong> The boundary prevents omissions, double counting, and inconsistent comparisons. It ensures that every user understands what the final number represents. A result without a boundary cannot be interpreted correctly.<\/p>\nBenefits.<\/strong> A stable boundary improves year-to-year comparison. It also allows changes caused by acquisitions, disposals, equipment replacement, or lease changes to be explained.<\/p>\nExample.<\/strong> A housing company may include every heat pump under its operational control from 1 January to 31 December. It may report electricity, refrigerant leakage, and backup fuel as operational emissions. Purchased heat pumps may be reported separately as capital goods.<\/p>\nThe boundary should answer:<\/p>\n \n- Which legal entities are included?<\/li>\n
- Which buildings and heat pumps are included?<\/li>\n
- Are leased assets included?<\/li>\n
- Is the report asset-level, organization-level, or product-level?<\/li>\n
- Which Scope 3 categories are included?<\/li>\n
- Which reporting period applies?<\/li>\n
- Which gases and refrigerants are included?<\/li>\n
- Which exclusions are material?<\/li>\n
- Which base year is used?<\/li>\n<\/ul>\n
Emission-source and scope classification<\/h3>\nDefinition.<\/strong> Source classification assigns each emission-producing activity to the correct scope, category, asset, and lifecycle stage. The classification follows ownership, control, purchasing, and value-chain relationships.<\/p>\nPurpose.<\/strong> It creates a consistent structure for calculation and disclosure. It also prevents the same activity from being counted twice in one inventory.<\/p>\nBenefits.<\/strong> Correct classification supports reporting standards and makes results easier to compare. It also shows which emissions the organization directly controls and which require supplier, customer, or market action.<\/p>\nExample.<\/strong> In a hybrid system, refrigerant leakage and gas combustion may be Scope 1. Purchased electricity may be Scope 2. Production of the purchased equipment and upstream fuel activities may be Scope 3.<\/p>\nA useful source register records:<\/p>\n \n- Source name.<\/li>\n
- Site and heat pump identifier.<\/li>\n
- Equipment owner and operator.<\/li>\n
- Emission scope.<\/li>\n
- Scope 3 category where relevant.<\/li>\n
- Activity-data owner.<\/li>\n
- Data source.<\/li>\n
- Calculation method.<\/li>\n
- Emission-factor source.<\/li>\n
- Materiality assessment.<\/li>\n
- Evidence location.<\/li>\n<\/ul>\n
Activity-data collection<\/h3>\nDefinition.<\/strong> Activity data is the measured or estimated quantity that causes an emission. Common units include kilowatt-hours of electricity, litres of fuel, kilograms of refrigerant, kilometres of transport, and kilograms of material.<\/p>\nPurpose.<\/strong> Activity data provides the measurable basis for each calculation. Higher-quality activity data produces a more representative and defensible result.<\/p>\nBenefits.<\/strong> Direct measurements make it easier to identify operating problems. They also reduce dependence on assumptions and portfolio averages.<\/p>\nExample.<\/strong> A heat pump controller may record electrical consumption, heat production, operating hours, and temperatures. Electricity bills can be used to reconcile the total imported electricity. Service reports provide refrigerant additions and recovery records.<\/p>\nPreferred activity-data sources include:<\/p>\n \n- Calibrated or approved meter readings.<\/li>\n
- Heat pump controller and connected meter data.<\/li>\n
- Utility invoices or supplier statements.<\/li>\n
- Refrigerant service and maintenance records.<\/li>\n
- Fuel-purchase records.<\/li>\n
- Supplier-specific product carbon data.<\/li>\n
- Engineering calculations.<\/li>\n
- Documented estimates.<\/li>\n
- Spend-based estimates as a last resort.<\/li>\n<\/ol>\n
The report should not present estimated data as measured data. Each data point should carry a source and quality status.<\/p>\n Emission-factor and GWP governance<\/h3>\nDefinition.<\/strong> An emission factor converts activity data into greenhouse gas emissions. A global warming potential, or GWP, converts the mass of a greenhouse gas into CO\u2082e over the time horizon defined by the selected methodology.<\/p>\nPurpose.<\/strong> Factor governance ensures that the correct value is used for the correct country, year, energy source, refrigerant, and reporting standard. It also prevents unapproved factor changes.<\/p>\nBenefits.<\/strong> Controlled factors make calculations reproducible. They allow management to separate changes in operating activity from changes in the electricity or fuel factor.<\/p>\nExample.<\/strong> A German site should use the electricity factor required by the selected reporting method and reporting year. An Austrian, Finnish, Spanish, or Polish site may require a different factor. Refrigerant calculations must use the GWP source required by the applicable inventory or regulatory method.<\/p>\nThe factor register should record:<\/p>\n \n- Factor name and identifier.<\/li>\n
- Value and unit.<\/li>\n
- Greenhouse gases included.<\/li>\n
- Geographic area.<\/li>\n
- Valid year.<\/li>\n
- Source organization.<\/li>\n
- Publication date.<\/li>\n
- Method or standard.<\/li>\n
- GWP assessment basis.<\/li>\n
- Approval status.<\/li>\n
- Date introduced into the reporting system.<\/li>\n
- Reports affected by later corrections.<\/li>\n<\/ul>\n
Do not mix GWP values from different methodological sources without disclosure. The same refrigerant can have different published values when different assessment bases or regulatory tables apply.<\/p>\n Electricity-accounting method<\/h3>\nDefinition.<\/strong> Electricity accounting converts imported electricity into Scope 2 emissions. It can use a location-based method, a market-based method, or both when required by the selected framework.<\/p>\nPurpose.<\/strong> The method distinguishes emissions associated with the electricity system from emissions associated with eligible contractual purchasing instruments. It explains how renewable electricity claims affect the reported result.<\/p>\nBenefits.<\/strong> A transparent method prevents unsupported claims of zero-emission operation. It also allows readers to compare grid conditions with procurement choices.<\/p>\nExample.<\/strong> A heat pump site may use electricity from the public grid, on-site photovoltaic generation, and a supply contract supported by contractual instruments. The report should show grid imports, self-consumed photovoltaic electricity, exports, factor sources, and the selected accounting method separately.<\/p>\nUnder the current GHG Protocol Scope 2 approach, location-based and market-based reporting can both be relevant when qualifying contractual instruments are available. The report must state the method, factor hierarchy, and contractual evidence used.<\/p>\n Electricity reporting should address:<\/p>\n \n- Total grid imports.<\/li>\n
- Heat pump electricity where separately metered.<\/li>\n
- Electric backup heating.<\/li>\n
- Pumps, controls, and auxiliary loads.<\/li>\n
- On-site generation.<\/li>\n
- On-site self-consumption.<\/li>\n
- Electricity exports.<\/li>\n
- Storage charging and discharging.<\/li>\n
- Contractual electricity instruments.<\/li>\n
- Residual or supplier-specific factors where applicable.<\/li>\n
- Upstream generation and transmission losses where included.<\/li>\n<\/ul>\n
Grid exports should not automatically be subtracted from imported electricity emissions. The treatment depends on the selected framework and the ownership of environmental attributes. Transmission and distribution losses can also fall outside Scope 2 for an electricity purchaser and may instead be reported in Scope 3.<\/p>\n Refrigerant-event accounting<\/h3>\nDefinition.<\/strong> Refrigerant-event accounting records refrigerant charge, additions, removals, recovery, loss, replacement, and disposal. It links each event to the affected heat pump and service record.<\/p>\nPurpose.<\/strong> The feature quantifies fugitive greenhouse gas emissions and supports refrigerant compliance. It also reveals recurring leakage or poor service practices.<\/p>\nBenefits.<\/strong> Accurate refrigerant records can improve maintenance planning and reduce environmental risk. They prevent refrigerant emissions from disappearing inside general service costs.<\/p>\nExample.<\/strong> A technician adds refrigerant after locating and repairing a leak. The reporting record identifies the refrigerant, quantity added, quantity recovered, reason for the intervention, date, equipment identifier, and supporting service document. The calculated emission uses the mass determined to have been released, not an undocumented assumption.<\/p>\nUseful refrigerant fields include:<\/p>\n \n- Refrigerant designation.<\/li>\n
- Refrigerant composition.<\/li>\n
- GWP source and value.<\/li>\n
- Original system charge.<\/li>\n
- Quantity added.<\/li>\n
- Quantity recovered.<\/li>\n
- Quantity sent for reclamation or destruction.<\/li>\n
- Confirmed or estimated quantity released.<\/li>\n
- Service date.<\/li>\n
- Service organization.<\/li>\n
- Technician qualification where required.<\/li>\n
- Leak location and cause.<\/li>\n
- Corrective action.<\/li>\n
- Supporting documentation.<\/li>\n<\/ul>\n
For owned or controlled equipment, fugitive refrigerant releases are normally direct Scope 1 emissions under an organization-level GHG inventory. EU F-gas compliance requirements should be used as a source of reliable service records where they apply.<\/p>\n Data-quality and uncertainty controls<\/h3>\nDefinition.<\/strong> Data-quality controls assess the reliability, completeness, timing, and representativeness of the information used. Uncertainty shows where the result depends on estimates or assumptions.<\/p>\nPurpose.<\/strong> These controls prevent a precise-looking total from hiding weak data. They also direct improvement work toward the most important data gaps.<\/p>\nBenefits.<\/strong> Management can distinguish measured performance from modelled performance. Reviewers can identify which results are suitable for external disclosure and which require qualification.<\/p>\nExample.<\/strong> One building has a dedicated electricity meter and complete service records. Another building allocates heat pump electricity from a shared building meter. The first result receives a higher quality rating, while the second is labelled as an estimate.<\/p>\nA practical quality hierarchy is:<\/p>\n<\/div>\n \n \n\n\n| Quality level<\/th>\n | Data type<\/th>\n | Typical example<\/th>\n<\/tr>\n<\/thead>\n | \n\n| A<\/td>\n | Direct, complete measurement<\/td>\n | Dedicated electricity and heat meters<\/td>\n<\/tr>\n | \n| B<\/td>\n | Verified supplier or invoice data<\/td>\n | Utility invoice or service report<\/td>\n<\/tr>\n | \n| C<\/td>\n | Engineering calculation<\/td>\n | Electricity estimated from runtime and rated input<\/td>\n<\/tr>\n | \n| D<\/td>\n | Proxy or portfolio average<\/td>\n | Average consumption for similar buildings<\/td>\n<\/tr>\n | \n| E<\/td>\n | Spend-based estimate<\/td>\n | Cost multiplied by an economic emission factor<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\nThe report should disclose material estimation methods. It should also define when estimated data must be replaced with measured data.<\/p>\n Baselines and normalized indicators<\/h3>\nDefinition.<\/strong> A baseline is the reference period or reference system used to measure change. A normalized indicator divides emissions by a relevant unit such as delivered heat, floor area, operating hour, occupied dwelling, product unit, or revenue.<\/p>\nPurpose.<\/strong> Baselines show progress over time. Normalized indicators help explain changes caused by portfolio size, weather, building use, or production volume.<\/p>\nBenefits.<\/strong> A company can distinguish a real efficiency improvement from a reduction caused by lower demand. It can also compare assets of different sizes.<\/p>\nExample.<\/strong> A building reports total tonnes of CO\u2082e and kilograms of CO\u2082e per megawatt-hour of useful heat. Internal analysis may also adjust for heating degree days. The external inventory still retains the unadjusted absolute total.<\/p>\nUseful heat pump indicators include:<\/p>\n \n- kg CO\u2082e per kWh or MWh of useful heat.<\/li>\n
- kg CO\u2082e per square metre.<\/li>\n
- kg CO\u2082e per occupied dwelling.<\/li>\n
- kg CO\u2082e per production unit.<\/li>\n
- Electricity input per unit of heat output.<\/li>\n
- Refrigerant emissions per installed heat pump.<\/li>\n
- Refrigerant loss as a percentage of system charge.<\/li>\n
- Percentage of activity data measured directly.<\/li>\n
- Percentage of sites with complete service records.<\/li>\n<\/ul>\n
Normalized indicators should supplement absolute emissions. They should not replace the gross inventory total.<\/p>\n Calculation traceability and audit trail<\/h3>\nDefinition.<\/strong> An audit trail connects every reported figure to its activity data, factor, formula, evidence, approval, and reporting version. It also records corrections and restatements.<\/p>\nPurpose.<\/strong> The audit trail allows another qualified person to reproduce the calculation. It supports internal review, external assurance, and regulatory inspection.<\/p>\nBenefits.<\/strong> Historical reports remain understandable after staff, software, or factors change. Errors can be corrected without losing the original record.<\/p>\nExample.<\/strong> A Scope 2 figure links to twelve monthly electricity readings, a named grid factor, unit-conversion logic, a calculation version, and an approval record. If the factor is corrected later, the system records whether previous reports must be restated.<\/p>\nThe audit record should retain:<\/p>\n | |