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Service · process

How a heat pump installation unfolds

From the technical survey to commissioning, we explain exactly what happens on your site, day by day. The fitting itself takes one to two days: here is how we organise everything so it is all ready on the day.

1 to 2 days on-site fitting time
Technical survey beforehand and free
Commissioning settings included
wendows team installing a heat pump outdoor unit
Planned jobslot confirmed in advance
Commissioninghandover included
On site

What happens, task by task

A heat pump installation is not just a machine dropped in a garden: it is a sequence of coordinated operations — refrigerant, hydraulic and electrical — carried out in the right order.

Technical survey

Before any work, a technician measures the heat loss, the location of the units and the state of the existing system. It is this survey that sizes the heat pump and the equipment.

Site preparation

Floor protection, removal of the old equipment if needed, preparation of the outdoor unit support and of the duct runs. The ground is ready before fitting.

Fitting outdoor & indoor units

Fixing the outdoor unit on anti-vibration feet or a bracket, and installing the indoor (hydraulic) module at the defined spot, accessible for servicing.

Hydraulic connection

Linking the heat pump to the heating circuit and, where relevant, to the domestic hot water tank. Filling, bleeding and leak-tightness check of the network.

Electrical connection

Dedicated supply from the panel, suitable protection and wiring of the control. Everything is brought up to standard and secured before switching on.

Commissioning & settings

Vacuuming of the refrigerant circuit, setting of the heating curve, the setpoints and the time slots, then operating tests in heating and hot water mode.

Step by step

From technical survey to handover

  1. Technical survey

    A technician comes out, measures the heat loss and validates the location of the units. This free survey locks in the sizing and the equipment: it is what guarantees a well-matched heat pump.

  2. Planning

    We set a fitting date together and order the equipment. You receive a clear schedule and the list of what to prepare on the home side before the day.

  3. Installation

    In one to two days, the team fits the units, makes the hydraulic and electrical connections and tidies the place up. You stay informed of progress at every step.

  4. Commissioning & handover

    Full tests, fine-tuning of the control, then an explanation of how it works and of day-to-day use. You leave with an operational system and the right habits.

1 to 2 days of on-site fitting on average
1 survey systematic preliminary technical survey
4 steps of a job framed from end to end
100% teams based in Belgium
Ready to launch your heat pump project?

It all starts with a free technical survey: we then lock in a fitting date and a clear schedule.

Frequently asked questions

How a heat pump installation unfolds

How long does the installation take?

On-site fitting usually takes one to two days, depending on the home layout and the type of heat pump. More complex jobs — difficult duct runs, removal of an old boiler, reworking the heating circuit — may need an extra day. The precise duration is given to you after the technical survey.

Does the heating have to be switched off during the work?

The heating is only interrupted for the time of the connections, generally for part of a day. We preferably schedule installations outside the coldest period and organise the job to limit the cut-off. At commissioning, the heating is back up and running the same day.

Is there any extra work to plan for?

It depends on what is already there. Some installations require a support for the outdoor unit, drilling a wall for the links, an adaptation of the electrical panel or the addition of a tank. These points are identified during the technical survey and priced in advance: no nasty surprises on fitting day.

What happens once the heat pump is fitted?

After commissioning, we set the control and explain day-to-day operation to you. You then benefit from follow-up: an annual service preserves efficiency and the warranty, and we stay reachable to adjust the settings during the first weeks of heating.

Before the day

What to prepare on the home side

A few points to check beforehand so the fitting goes off without a hitch on the day.

  • Clear access for the team and the equipment up to the work areas
  • A free, ventilated spot for the outdoor unit (stable ground or load-bearing wall)
  • An accessible space for the indoor module, near the heating circuit
  • An electrical panel in good order, with spare capacity for the heat pump dedicated supply
  • The clearing of the old boiler or the equipment to be replaced, if necessary
  • A water supply and a drain near the indoor module
  • The removal of fragile items and the clearing of the planned duct runs
  • The presence of a point person on site to validate the locations
Customer reviews

They chose wendows

5.0/5 · 3verified reviews

« Châssis, panneaux et pompe à chaleur en une seule fois : on a eu un seul devis, un seul planning et zéro paperasse pour les primes. Le résultat est impeccable et notre facture d'énergie a chuté. On ne pensait pas que ce serait aussi simple. »
Famille DuboisWavre · Brabant wallon
« Passage du mazout à une pompe à chaleur air-eau. Chantier propre, anciens radiateurs conservés. La maison est mieux chauffée pour bien moins cher. »
Ahmed B.Charleroi
« PAC air-air réversible installée avant l'été. Confort été comme hiver, et le SAV répond vite. Très satisfait du suivi. »
Nathalie F.Verviers

Want to know how your job would go?

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