Heat pump quote: what it should include to avoid surprises

What should be in writing

A complete quote describes the whole installation, not just the unit:

• Equipment: brand, model and output in kW (for example, an 8 kW Vaillant aroTHERM plus).
• Output justified by a calculation: floor area, year built, insulation, part of the island and number of occupants.
• Domestic hot water: cylinder and litres.
• Buffer tank and pump group, if the system needs them.
• Emitters: whether the radiators stay, some are replaced or underfloor heating or fan coils are added.
• Removal of the old boiler and what happens to the oil tank (emptied, made inert or removed).
• Electrical work and, if needed, an increase in contracted power.
• Certification under the RITE regulations, installation certificate and commissioning.
• Energy certificates before and after, required for the income-tax deduction.
• Handling of the energy-saving certificates (CAE) and of the financing.
• Written warranties for the equipment and the installation.

Why the output matters

An oversized heat pump keeps switching on and off and costs more; an undersized one cannot cope on cold days. In Mallorca, a house on the coast does not need the same output as one inland or in the Tramuntana mountains. Ask for the quote to explain where the kW figure comes from.

Radiators, underfloor heating or fan coils

A heat pump is more efficient the lower the water temperature: underfloor heating is the most efficient emitter, fan coils also cool in summer, and many existing radiators work if they are the right size. The quote should state what happens to the emitters, as it changes both the result and the price.

Grants and financing it should cover

The FACTOR 2026 programme closed on 17 October 2026 (BOIB no. 132). What is still available and worth seeing in the quote:

• CAE energy-saving certificates: when an oil, propane, butane or gas boiler is removed, about €2,000 for an 8 kW unit.
• National income-tax deduction: 40% (maximum base €7,500) on a main or rented home, if the work cuts non-renewable energy use by at least 30% and is finished before 31 December 2026.
• Balearic income-tax deduction: 50% (up to €5,000 a year) with an income limit. It cannot be combined with the national one: we tell you which suits you.
• Vaillant PLAN6000YA financing: €6,000 in 12 instalments of €500 at 0% interest and 0% APR, until 31/12/2026 and subject to approval.

What to ask before signing

• Is certification included, and who signs the certificate?
• Does it include the energy certificates for the tax deduction?
• Who handles the CAE, and when are they paid?
• What happens to the boiler and the oil tank?
• Is the price fixed and VAT-inclusive, or could there be extras?