Before replacing a fixed air conditioner: establishing the applicable RITE route

Neutral AI-generated editorial illustration of a light-coloured folder and two blank cards on a table, with a wall-mounted air conditioner in the background; not a real property, an installation diagram or confirmation that an installation meets the requirements.

An apartment owner on the Costa Blanca is choosing a new fixed air conditioner and receives a short offer: “We will remove the old one and fit a similar replacement.” Before agreeing, it helps to establish exactly what the contractor considers the equipment being replaced and how this work relates to the home's entire thermal installation. Two units looking alike does not explain the applicable technical and administrative procedure.

The key decision comes before placing the order: is the scope defined well enough to compare offers and agree on the chosen option, or is a professional classification of the installation needed first? This is not a brand-selection guide, a capacity calculation or installation instructions. The article does not authorise an owner to connect equipment, handle refrigerant or determine the system's safety from a photograph.

Why a “similar appliance” does not mean there are no questions

RITE — Reglamento de Instalaciones Térmicas en los Edificios — covers fixed climate-control installations. Article 2 treats replacement of a heat or cold generator with a similar one as a reforma too. Article 15 distinguishes a project for nominal thermal capacity above 70 kW and the option of a memoria técnica from 5 to 70 kW inclusive; for multiple generators, capacity is determined using the relevant combined group. This is not an instruction to add every figure printed on the boxes. Article 24 separately regulates commissioning and states that registration is not technical approval of the installation by the administration. A specialist must justify the applicable option.

GVA page 19316 treats independent apartment installations and common building installations separately. It also sets out a conditional registration exception when replacing a generator with a nominal useful capacity no greater than 70 kW: the change relative to the replaced generator must not exceed 25%, and the installed generator must not exceed 70 kW. Documentation of the alteration must be kept: at least the factura for purchase and installation, or the certification required by other applicable industrial-safety rules. This is not exemption from all requirements. For a new installation or reforma, the page states that the instalador habilitado who performed the work starts the procedure. Individual applicability is checked before choosing the route.

1. Describe the task rather than substituting a model name

Explain why replacement is planned: failed equipment, a change in how rooms are used or another agreed reason. State which rooms are under discussion and what you want to retain. If the task still amounts to “make it better”, ask the contractor to turn it into a verifiable description of the offer. Do not add your own promise of a particular saving, quietness or cooling of the whole apartment.

Record the order's boundaries separately: for example, is only existing equipment being replaced, or are new service points and a different location also proposed? This is a list of questions for the contractor, not a technical classification by the owner. Two prices for a “new air conditioner” cannot fairly be compared if one covers a limited replacement and the other an as-yet undescribed change to the system.

2. Establish the system boundary first

Give the specialist any available old documents, model identifiers and information about previous changes. Identify the units and rooms served that you know about, and which connections remain unclear. Photograph only accessible labels without opening equipment or approaching dangerously. Do not step onto exterior structures or dismantle equipment to complete a list.

Ask what is included in the thermal installation being considered: only the apartment system you know, or elements linked to other premises and common systems? “That is your unit” does not yet answer the question of the entire installation's boundaries. If the offer accounts for only one new appliance, clarify which existing elements the specialist excluded from the calculation and why.

If old paperwork is missing, state that gap honestly. Do not reconstruct the system's capacity and composition from the apartment's sale listing or a similar catalogue model. Ask for the next professional survey step and an explanation of the baseline information needed for the offer. Until the answer is available, keep the description provisional rather than treating an unknown configuration as a confirmed independent installation.

3. Ask for the figures to be explained before comparing thresholds

A sales card, technical data sheet and electricity bill may contain different measures. For the RITE discussion, ask the specialist to identify the exact quantity used, its unit, the source of the value and the equipment to which it relates. Do not substitute electrical input power or an advertised coverage area for the required thermal measure.

It is useful to request two clear lines: the value for the equipment being replaced and the value for the proposed equipment, with the source document for each. Separately, ask where the remainder of the installation is reflected in the justification. An owner should not pick the smallest figure in the specifications to obtain a preferred administrative outcome.

If one supplier states only an individual appliance's capacity while another discusses the whole system, resolve the differing starting assumptions first. The route's correctness cannot be judged by whose offer has the lower total. Request equally clear descriptions of the work boundaries; engineering calculations and selection of the relevant measure should remain with a competent specialist.

4. Separate classification of the work from the registration question

Ask the contractor to answer separately: how they classify the proposed intervention; what baseline information they rely on; and which documentation and administrative procedure they consider applicable. “Nothing needs registering”, without an explanation of these links, does not yet enable an informed ordering decision. Nor should it automatically be treated as wrong: check the basis rather than arguing against the conclusion in advance.

If the contractor invokes an exception, request a written explanation of its applicability to the named configuration and the specific replacement scope. Do not turn the percentage mentioned in the rule into a home-made permission calculator. Before discussing the comparison's result, the quantities compared, their source documents and exactly what will replace what must be clear.

If the answer changes after the model or scope is clarified, ask for the offer to be updated before agreeing the order. Do not retain an old promise of “no paperwork” as a condition of new, broader work without renewed confirmation. A useful checkpoint is that the selected configuration and explained route must refer to the same version of the offer.

5. Compare offers covering the same subject

For two offers, prepare a small table: what is being replaced, what remains, what additional work is envisaged, what baseline information is still missing and who explains the applicable route. Do not limit the comparison to brand and price. If one option includes a necessary professional assessment and the other excludes it, that should be visible before the decision.

Ask what the quoted price includes on the documentation side and who will carry out the corresponding actions if required. Do not invent an arbitrary “RITE supplement” in advance, or treat the absence of a separate line as proof that everything is included. The question should be specific: which actions are promised for the stated amount and what would justify changing it?

If the visit reveals that the previous description is insufficient, it is better to obtain a clarified scope than to continue under the old wording just to preserve an attractive price. This is not a recommendation to accept any price increase. The point is to discuss a change for an understandable reason and before additional work is performed.

6. Do not extend a RITE conclusion to the apartment's other issues

Discussing the thermal installation does not automatically answer questions about the outdoor unit's position, common building elements or access for work. If the proposal changes equipment location or the way routes pass through structures, list those changes separately and ask who checks the necessary approvals. Do not present the installer's agreement as a decision by the comunidad or municipality.

Nor should electrical work, refrigerant handling and the chosen RITE route be combined into a single promise. Ask for those responsible for the respective parts of the order to be identified, along with issues requiring separate checks. The article does not determine the permissions applicable to your property or give instructions for specialised operations. An unknown condition is better kept visible until confirmed than hidden behind the word “installation”.

7. Agree future evidence before installation

Ask in advance which documents and explanations the owner will receive under the chosen option, who will prepare them and which stage they concern. This is not a demand for an identical package for every replacement. What matters is the contractor explaining the connection between their conclusion about the route and the outcome promised to the owner.

If the quotation lists only the product, clarify where the installation work itself is described and who performs it. If the equipment seller and installation company differ, establish who answers questions about the combined offer. Do not treat a shop's advertising statement as confirmation that the installation company has already assessed your apartment. The parties to the order first need an agreed scope.

Record which changes will require another discussion before being carried out: a different model, additional equipment, relocation or some other expansion of the agreed scope. The list should relate to your offer rather than being copied as a universal legal form. It helps avoid discovering after installation that the basis of the original decision has already changed.

8. What should be clear before agreeing to replacement

Before ordering, you should be able to explain four things in your own words: which installation the specialist is considering; exactly what changes; why this route was chosen; and which questions remain before the relevant stage begins. This is an organisational check of the offer's completeness, not independent technical approval by the owner.

If even one answer rests only on a guess, formulate a specific request rather than approving the whole package as “suitable”. For example: “Please explain which existing elements were considered when choosing the route” or “Please confirm whether the explanation of the exception applies to the latest offer.” Conflicting professional answers call for further specialist assessment, not a vote among acquaintances for the more convenient option.

The preparation should result in a selected order scope with understandable grounds and explicit outstanding conditions. It does not guarantee no costs, energy savings or all approvals. But it enables an owner to decide on replacing a fixed air conditioner based on a description of the specific system, rather than two boxes looking alike and the promise that “it is just a replacement”.

Sources and scope of verification

On 31 October 2026, the following were read: GVA 19316: the procedure for thermal installations with nominal capacity of 5–70 kW and BOE: RITE, Real Decreto 1027/2007, Articles 2, 15 and 24. BOE's consolidated text is informational. The specified provisions and substantive sections of the regional procedure were checked, not all RITE technical instructions or a particular installation. The organisation of pre-order questions consists of Laverna editorial recommendations; calculations, individual applicability and any other necessary approvals require professional verification.