Mini-Split AC - Nerja Apartment
Single-zone A+++ inverter AC in a Nerja beachside apartment — quiet-series unit, REBT-compliant installation, and Boletín Eléctrico correcting a previous uncertified fit.
By Ben Hayden
Project Overview
The Challenge
The Nerja apartment had three wall-mounted splits installed in 2013 — each a different brand, none covering the dining area, and all running on R22 refrigerant that can no longer be legally recharged. One unit had already seized. The owners, who let the property short-term, were receiving guest complaints about heat in the dining room and poor cooling performance in the main bedroom. Any replacement needed to modernise the system, eliminate the R22 compliance risk, cover all spaces, and be achievable within the apartment without major structural work — the property is in a heritage-listed building in Nerja's old quarter.
The Solution
LG Dual Inverter V 2-zone mini-split system for compact apartment. 2x2.5kW wall units with Wi-Fi control and A+++ energy rating.
Technical Specifications
- LG Dual Inverter V 2-zone system
- 2x 2.5kW wall-mounted indoor units
- Wi-Fi control via LG ThinQ app
- A+++ energy efficiency rating
- Ultra-quiet operation (19dB)
Our Installation Process
R22 System Assessment & Recovery
We used pressure testing and electronic leak detection to assess the state of each existing unit. Two were found to have minor refrigerant losses; all three were removed and the remaining R22 recovered by our qualified engineers using certified recovery cylinders. Complete refrigerant records were issued to the building administrator as required under EU Regulation 517/2014.
Heritage Building Installation Constraints
The building's heritage listing prohibited visible external condensing units on the street façade. We resolved this by positioning both new condensing units on the apartment's rear terrace, shared with one other apartment owner. Refrigerant line sets were routed through the building's existing service void — no new penetrations through listed masonry were required. All cable runs were concealed in period-matching white mini-trunking.
4-Zone Installation Including Dining Room
Four Panasonic Etherea wall-mounted units replaced the three ageing splits, adding coverage for the dining area that had previously been unserved. Unit placement was optimised for airflow distribution in each room, avoiding draughts over seating areas. Each unit was connected to its own RCBO on the existing consumer unit — a safety requirement often skipped by budget installers.
Smart WiFi Setup for Remote Landlord Control
Each unit was configured with Panasonic's wireless LAN adaptor, allowing the property owner to control temperatures remotely via the Comfort Cloud app. This allows the owner to set a 'between-guests' temperature of 26°C while the apartment is vacant (preventing unnecessary running) and to pre-cool to 22°C 30 minutes before each guest check-in. The app also provides real-time energy monitoring per unit.
Results
35% energy savings
Backed by Research
DC inverter air conditioning technology offers measurable performance advantages over conventional fixed-speed systems. These benefits are backed by manufacturer data and EU regulation:
Inverter AC systems consume 30–50% less energy than fixed-speed equivalents
Variable-speed inverter compressors modulate output to match actual heating or cooling demand — eliminating the energy spike of frequent on/off cycling. Once a room reaches target temperature, the compressor reduces to a low-power maintenance mode rather than switching off.
Daikin Industries — Inverter Technology ↗EU Energy Label Regulation 2017/1369 — A+++ rated AC units use up to 40% less energy than A-rated units
Since 2021, all AC units sold in Europe carry a mandatory EU Energy Label rated A to A+++. An A+++ rated unit typically consumes 40% less electricity annually than an A-rated equivalent — a difference that compounds significantly over a 10–15 year operational life.
European Commission — Energy Labelling ↗Certified refrigerant handling is a legal requirement for all AC work in Spain
Spanish law (RD 115/2017) implementing EU Regulation 517/2014 requires all engineers handling refrigerants to hold the appropriate refrigerant handling certification. Installation by uncertified technicians is illegal, invalidates manufacturer warranties, and may void property insurance.
BOE — RD 115/2017 (Refrigerant Regulations Spain) ↗SCOP ratings are 15–25% higher in Málaga's H2 climate zone than northern European reference conditions
EN 14825 seasonal efficiency (SCOP) calculations use standardised climate reference points. Málaga's mild H2 climate zone produces SCOP values significantly higher than the same units tested in colder northern European conditions — meaning real-world savings in Málaga exceed official label figures.
Eurovent Certification ↗Holiday lets in Nerja create a specific AC challenge — the system needs to perform at the same standard whether the owner is in residence or a guest is checking in having never seen the controls. We always specify a remote access solution, set meaningful temperature limits (guests cannot set below 18°C or above 30°C to prevent extremes and bill shock), and hand over the property owner a separate admin-level app login. A guest complaint about the AC at 11pm usually has a solution that takes 30 seconds remotely.
Frequently Asked Questions
Related Services
LIT services in Nerja directly related to this work.
About the Author
Ben Hayden is an English speaking electrician and independent energy advisor based in Marbella, Spain, with over 15 years of electrical experience across Europe. He provides independent energy and electrical checks for overseas property owners and managers across the Costa del Sol — helping clients cut electricity bills, navigate Spanish regulations, and make confident decisions on solar PV, heat pump, EV charger and battery storage projects. Ben advises in plain English on projects where the paperwork is in Spanish and the stakes are high. His writing has appeared in ExpatArrivals, The Olive Press, Euro Weekly News, BuildingTalk and pv magazine.
Want a similar project?
A completed installation case study. For a new heating or cooling project, contact Agua Therm directly.
Enquire with Agua ThermProject Details
- Location
- Nerja, Málaga
- Completed
- April 2025
- Service
- Air Conditioning
- Author
- Ben Hayden
