France: room temperature controls and pipe insulation

A French building survey can now produce four different compliance questions from the same plant room. Local temperature regulation, pipe insulation, building automation and annual tertiary energy reporting are related, but they are not one obligation. A thermostat deadline does not automatically require a building management system (BMS), and an OPERAT declaration does not prove that room controls or insulation are present.

Decree 2025-1343 changed the timetable for three of these regimes. For local temperature controls and distribution-pipe insulation, the decisive dates are now 1 January 2027 for specified new construction and 1 January 2030 for other buildings within scope.

The two dates after decree 2025-1343

Articles R. 241-6 and R. 241-31-1 of the Energy Code have been in force in their current form since 1 March 2026. Their application clauses set two later dates:

The first row is tied to the date of the permit application or déclaration préalable. It should not be shortened to “all new buildings from 2027”, because the filing date is part of the legal trigger. The second row captures existing stock, but only within each article’s stated building and system scope.

The dates are stock-wide backstops. They do not remove requirements that another building-energy rule may trigger when heating, cooling or distribution equipment is installed or replaced. Record the rule used for each project decision rather than relying on a single date in a portfolio spreadsheet.

Automatic control by room or zone

Article R. 241-31-1 applies to heating and cooling in buildings or parts of buildings used as dwellings, and in buildings or parts used for commercial or non-commercial tertiary activities. Tertiary space owned by a primary-sector or secondary-sector organisation is included.

The local control has to regulate temperature automatically by room or, where the design justifies it, by heating or cooling zone. The minimum control time step is hourly. For heating, the system must allow manual control and programmed indoor set points with at least four modes:

• comfort;
• reduced, with automatic switching between comfort and reduced;
• frost protection;
• off.

The system must allow automatic or manual switching between all four modes. A central hydronic heating system also needs a regulator in class IV, V, VI, VII or VIII under the referenced European ecodesign communication, unless the heating system and local controls are technically incompatible.

Cooling controls must also regulate automatically by room or justified zone at a minimum hourly step and provide the manual and programming functions specified in the heating rules.

A room sensor is evidence of temperature, not evidence of control. Acceptance should show the sensor, set point, schedule and actuator as one working loop. Change a scheduled set point, confirm the command reaches the correct zone, observe the valve, damper or equipment response, and confirm that the measured room condition follows without another controller reversing the action.

Exceptions and the BACS route

The control obligation does not apply to an independent heater whose fuel supply is not automated. More generally, the duty applies only where it is technically and economically feasible. The implementing order describes the economic case as an owner-produced study showing that compliant local controls cannot achieve a simple payback of less than ten years.

For heating, a system connected to a BACS as defined in Article R. 175-1 of the Construction and Housing Code is deemed to meet Article R. 241-31-1. That does not reverse the rule. A building can meet the local heating-control duty with compliant local controls and no BACS, while a building that is independently in BACS scope must meet the full BACS functions.

Keep the exemption study, design basis and acceptance evidence with the asset record. A line saying “not economic” without the study does not establish the exception.

Insulation for heat and cold distribution

Article R. 241-6 covers a different set of buildings and equipment. It applies to:

• collective residential buildings or parts of them;
• buildings or parts used for commercial or non-commercial tertiary activities, including tertiary space owned by primary-sector or secondary-sector organisations;
• heat distribution for space heating or domestic hot water, including connections to district heating, where the network is outdoors or outside the heated volume; and
• cold distribution for cooling, including connections to district cooling, where the network is outdoors or outside the cooled volume.

The residential scope is therefore narrower than the room-control rule. Article R. 241-6 says collective residential buildings. It does not turn the 2030 backstop into an insulation duty for every individual house.

The implementing order sets maximum linear or surface thermal-transmission values. Insulation at class 4 or above under NF EN 12828+A1:2014 is deemed to satisfy them. Heat and cold networks must be insulated separately. Where the network owner establishes a technical impossibility in meeting the specified values, the network must still be insulated to achieve the lowest transmission coefficient possible.

The cited rules do not give the insulation duty the ten-year payback exception used for local controls. Do not apply one obligation’s exception to the other.

Survey the complete route, not a sample beside the plant-room door. Record pipe service, diameter, operating temperature, location relative to the heated or cooled volume, insulation class or calculated thermal transmission, thickness, condition and every discontinuity. Valves, flanges, strainers, pumps, supports and damaged vapour barriers can dominate losses on an otherwise insulated run.

A thermal image can locate hot or cold discontinuities under stable conditions. It does not identify an insulation class by itself. Keep the product declaration, installed dimensions and photographs with the route record.

How these duties differ from BACS and OPERAT

The four regimes answer different questions.

The BACS threshold is capacity, while Eco Energie Tertiaire is generally based on tertiary floor area. The local-control article contains neither the 70 kW BACS threshold nor the 1,000 m² tertiary threshold. The pipe-insulation article is based on building use, network service and the pipe’s location relative to the conditioned volume.

One site can fall under all four regimes. Another can need room controls and pipe insulation without crossing the BACS or Eco Energie Tertiaire thresholds. Assess each rule separately, then reuse the same verified asset register and measurements where their evidence overlaps. The French BACS guide covers its functions and inspection evidence in detail.

Build one evidence plan without merging the obligations

Start with a building and system register:

1. Record residential and tertiary uses, collective residential status, tertiary floor area, and the building-permit or prior-declaration date where relevant.
2. List every heating and cooling system, its useful rated output, served rooms or zones, and whether its fuel supply is automated.
3. Trace heat, domestic-hot-water and cold distribution outside the heated or cooled volume.
4. Record the existing room or zone sensor, controller, schedule, actuator and plant interlock for each control loop.
5. Map fiscal and submetered energy boundaries to the functional entity used in OPERAT.
6. State which system owns each control action and how manual override, communications failure and recovery behave.

Then test physical outcomes. For controls, witness scheduled and manual changes in representative zones, including a loss of communication. For insulation, inspect the full relevant route and retain the installed-product evidence. For BACS, test the functions and records required by the Construction and Housing Code. For OPERAT, reconcile the declared annual totals with invoices and the meter boundary.

Temperature and energy monitoring make these checks repeatable. A representative zone sensor can show whether comfort and reduced periods are distinct. Heat meters and energy inputs can show standing losses or unexpected circulation. Electricity submeters can show whether pumps, chillers or air-handling units run outside their schedule. The heat-meter data guide explains how to preserve meter identity, units and counter continuity.

Monitoring does not replace the regulated function. A trend that shows a room overheating does not prove that a valve can correct it. A heat balance that suggests distribution loss does not prove which insulation product was installed. Keep observation, control and construction evidence separate.

Where EpiSensor fits

EpiSensor can collect representative room conditions, electricity, pulse and heat-meter data, and operating states from existing plant. Edge records the data locally on the Gateway and can pass it to another system over documented interfaces. This can support commissioning, exception studies, fault finding and an evidence trail shared with the energy team.

The local controller or BACS remains responsible for the approved control sequence. Insulation compliance remains a property of the installed network. OPERAT remains the reporting platform for the tertiary scheme. Define those ownership boundaries before selecting sensors or enabling a write path.

Use the HVAC energy-monitoring guide to map energy, state and occupied conditions. Use the System Builder after the required measurements and interfaces are known.