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Laurent Duplat — Founder, Vocalis AI Published 18 May 2026 · 9 min read · Energy renovation

It's 8:47 PM on a Thursday evening. A homeowner has just received her energy performance diagnosis: rating F. Her France Rénov advisor told her that MaPrimeRénov can cover up to 90% of an air/water heat pump if she uses an RGE certified artisan. She types into Google "RGE artisan air water heat pump [her town]" and finds three results. She calls the first — voicemail. The second — voicemail. The third picks up — not the plumber himself, but a natural voice saying "Good evening, you've reached [company name], would you like to know more about energy renovation?". She says yes. Twelve minutes later, her file is pre-qualified, a technical site visit is confirmed for the next day at 10 AM, and your competitor has just secured a €14,500 contract.

This scenario plays out dozens of times each week in every French department. The RGE certification is a powerful filter — clients searching for it are qualified leads, with a concrete project, calculated financial aid and strong purchase intent. But this filter is useless if your phone doesn't answer at the right moment.

RGE certification: a competitive advantage you're under-exploiting

France today has around 60,000 companies holding at least one RGE qualification (Reconnu Garant de l'Environnement), according to Qualibat and Qualifelec data. This figure may seem large — but compared to the volume of works eligible for State grants, it's a structural shortage of qualified labour.

The explosion of MaPrimeRénov demand

Since 2020, the MaPrimeRénov scheme has transformed the energy renovation market. In 2024, more than 700,000 files were submitted to ANAH. In 2025, the scheme reform concentrated grants on comprehensive renovations — insulation, ventilation, heating — which mechanically increased the average value of funded works. Major renovation, with mandatory energy audit, now represents projects of €30,000 to €80,000, of which 50 to 90% can be covered depending on household income.

Direct consequence for RGE artisans: demand for qualified leads is exploding. Households with EPC ratings E, F or G are actively searching for an RGE certified artisan in their geographic area. And they're searching now — because ANAH administrative deadlines can reach 6 to 9 months, and they want to secure their artisan before starting the file.

The real value of a qualified RGE lead

A qualified RGE lead — that is, a prospect who understands the MaPrimeRénov scheme, has a defined renovation project and is specifically looking for a certified artisan — represents an average ticket between €8,000 and €25,000 depending on the type of works:

The maths is brutal: if you miss 2 qualified RGE leads per week — because no one answered between 6 PM and 9 PM or during the weekend — you lose between €32,000 and €100,000 in potential turnover per month. Not cold prospects: households with an EPC rating F, a budgeted project and a calculated grant who were just waiting for your call.

The problem: RGE leads call outside your office hours

RGE artisans manage their phone like any artisan: they answer when they're not on a site, traveling or in a site meeting. This de facto excludes the most active time slots for energy renovation prospects.

When RGE prospects really call

Behavioural data from prospects on France Rénov platforms and RGE artisan websites reveals a very clear peak of activity:

Outside these slots, RGE artisans are theoretically available — but in practice, they're on sites, doing quotes or in compulsory RGE training. The phone rings in their pocket, they see an unknown number, and they can't answer.

Response time: conversion factor #1

Studies on B2C prospect behaviour in energy renovation are unanimous: response time is the first conversion factor, before price, before reputation, before Google reviews. A prospect calling 3 RGE artisans systematically chooses the one who answered first — or whose first contact was most reassuring and competent.

More specifically: if an RGE artisan calls back within 5 minutes of a missed call, his conversion rate is 45 to 55%. If the callback occurs 2 hours later, the rate drops to 15 to 20%. If the callback is the next morning, the prospect has already signed with someone else in 70% of cases.

"I had good Google ranking for 'RGE artisan heat pump' in my area. But I lost half the calls during site work. I estimated 3 or 4 leads per week. Actually, it was 11 to 14. The voice agent proved it to me in 3 weeks — it catches everything I was missing."

— Sébastien M., RGE heating engineer, Loire-Atlantique

Automatic MaPrimeRénov lead qualification in 6 minutes

The AI voice agent doesn't just answer for you. It conducts a structured conversation that qualifies the MaPrimeRénov lead with the same precision as an experienced salesperson — in under 6 minutes, at any time.

The 8 key RGE qualification questions

The conversation follows an adaptive, natural and non-robotic script that covers essential qualification points in logical order:

  1. Type of works planned: insulation (loft, walls, floors), heating (heat pump, biomass boiler), ventilation (dual-flow VMC), windows, comprehensive renovation. This information determines your relevant RGE qualification and the amount of potential aid.
  2. Current EPC: rating A to G. An EPC E, F or G = confirmed MaPrimeRénov eligibility. An EPC C or D = partial eligibility, reduced grant. The agent adapts the discourse based on the response.
  3. Habitable surface: determines the grant amount (caps per m²) and estimated work duration.
  4. Reference tax income: very modest / modest / intermediate / higher category. The agent doesn't ask for the exact amount — it guides the prospect towards the category ("Is your income below [threshold] for a household of [size]?"). This information determines the aid rate and lead priority.
  5. Owner / tenant status: MaPrimeRénov is reserved for occupying owners and landlord owners (under conditions). A tenant without landlord agreement = unqualified lead to redirect.
  6. Type of housing: detached house or apartment in a co-ownership. Works in co-ownership require a general meeting vote — additional delay and different process.
  7. Desired completion time: immediate (before winter) / within 6 months / project over a year. Determines lead temperature and callback priority.
  8. Has the prospect already contacted a France Rénov advisor?: if yes, they already have support — the file is progressing. If no, the agent can offer to direct them to an advisor while scheduling your technical visit.
60KRGE artisans in France for 700K+ MaPrimeRénov files/year
+240%qualified leads processed vs before voice agent (8-month panel)
12hsaved per week on phone sorting and qualification

Automatic grant pre-estimation

From the data collected — type of works, surface, income, EPC — the agent calculates an indicative MaPrimeRénov grant range and communicates it to the prospect before the end of the call. This is not a contractual commitment, but a first figure that anchors the conversation and reassures the prospect about the project's financial feasibility.

Result: when you call back the next morning, the prospect already has a figure in mind, they know you're aware of their project and that you've done the upstream work. The technical visit confirmation rate climbs to 78% versus 45% without this prior qualification step.

See also: our complete MaPrimeRénov 2026 guide for tradespeople — all the scheme's rules, income caps and eligible work types, updated in real time.

Lead prioritisation and sorting: priority household vs vague project

Not all RGE leads are equal. A household with EPC rating G with a heat pump to replace before winter, modest income eligible for maximum grants, owner of a detached house and a 3-month deadline — that's an A+ lead. A curious browser inquiring "for in 2 years, if we renovate" — that's a C lead that doesn't deserve the same immediate treatment.

The automatic scoring system

The voice agent assigns a qualification score to each call according to a weighted grid:

Hot leads: immediate SMS callback

For A leads, every second counts. As soon as the conversation ends, you receive a structured SMS on your phone:

You call back from your van between two sites. You have all the information. The conversation lasts 4 minutes instead of 20. The technical visit appointment is confirmed.

Cold leads: automatic nurturing without effort

C and D leads don't disappear into the void. The agent integrates them into an automatic nurturing sequence: sending an informative guide "How to prepare your MaPrimeRénov file" (link to your resources page), automated follow-up at D+30 with a personalised message, and alert if the prospect calls back spontaneously (sign of project maturation). You manage nothing — but you lose nothing either. See also our article on energy renovation grants for tradespeople.

Results over 8 months — heating and insulation RGE artisans

On a panel of 31 RGE artisans (heating engineers, insulators, QualiPV-qualified electricians) who activated the voice agent between September 2025 and April 2026, the results measure the real impact on commercial activity:

Volume and response rate

Conversion and turnover

Time savings and quality of life

For artisans specialising in loft insulation, see our detailed analysis: Loft insulation: qualifying leads — specific eligibility criteria and adapted qualification scripts.

Frequently asked questions from RGE artisans

Can MaPrimeRénov eligibility be qualified over the phone?

Yes, and it's actually one of the strengths of the AI voice agent. It asks the decisive questions: type of works, current EPC rating, household reference tax income, owner/tenant status, heated surface area. This data allows the household's eligible grant to be estimated even before your first callback. You arrive at the appointment with a credible pre-estimate — a decisive advantage over competitors who discover the situation on site.

Which types of RGE works are best converted?

High-ticket, short-deadline works convert best: boiler replacement (air/water heat pump, air/air heat pump), loft insulation (simple task, maximum grants), and window replacement. External wall insulation and dual-flow ventilation generate more "cold" leads (6-12 month project) requiring nurturing rather than immediate conversion. Also check our dedicated page for heating engineers for heat pump and biomass boiler specifics.

How do you handle "tourist" leads (unqualified browsers)?

The agent identifies "tourist" profiles in less than 90 seconds through disqualification questions: tenant without landlord agreement, ineligible secondary residence, income above MaPrimeRénov ceilings, works already funded by another scheme. These leads are directed to informative resources and don't generate an immediate callback — you save sorting time without losing the contact trail.

Can the agent send a financing file automatically?

Yes. After the call, the agent can trigger the automatic sending of an email or SMS containing a personalised financing guide: ANAH links, MaPrimeRénov simulator, checklist of documents to prepare (tax notice, EPC, title deed). This post-call sequence increases engagement before your first callback and positions your company as an RGE expert from first contact. Find all the details in our guide to energy renovation grants for tradespeople.