Quote: heat-recovery ventilation
E.g.: dual-flow heat recovery ventilation in an overall energy renovation
Provide plans, room uses, occupancy and planned insulation works. Identify existing ventilation and combustion appliances. Assess duct routes and served rooms before selecting a unit on its advertised efficiency alone.
Request room-by-room design
Zehnder highlights network sizing and terminal flow measurements during balancing. Request a plan and commissioning record for your installation.
Reserve serviceable space
Show access and removal space for filters, exchanger and components. Identify intake, exhaust, ducts and condensate drain. Specify treatment of ducts through unheated areas.
Define expected comfort
Request bedroom and terminal acoustic assumptions and verification. Explain normal and boost operation, summer control and compatibility with other appliances. A claim of inaudibility does not replace these details.
Obtain model-specific instructions
The consulted Zehnder guidance concerns particular units and filter alerts. Request your model’s manual, consumable references and permitted user tasks; do not transfer one interval to every installation.
Prepare support evidence
The 2026 renovation scheme specifies recovery, electricity use, measured airtightness and ventilated-area conditions. Check the application and prior approval with the adviser; the unit label alone is insufficient.
Indicative prices in Luxembourg
On quotation
Compare unit, ducts, terminals, penetrations, acoustic treatment, condensate drainage and settings. Include building finishes and maintenance. Exchanger efficiency is not the saving percentage on the whole bill; no local average price is published.
Subsidies and grants
No grant is deducted from the budget shown here. If a quote mentions support, request the exact scheme and confirmation of your eligibility before including it in financing.
Frequently asked questions
Is higher efficiency enough to choose?
Compare useful airflow, electricity, noise, ducts and maintenance too.
Can it fit without a dropped ceiling?
Assess routes; general feasibility is not a plan for your home.
Do all filters need the same replacement interval?
Follow model instructions, alerts and contamination checks.
Is it compulsory in every renovation?
Check project-specific requirements. A grant condition is not a universal obligation to use this technology.