Year-round living
Winter comfort on Costa Blanca South: heating, ventilation and damp checks
A practical guide to how a home feels on a cool morning and what to verify before buying.
At a glance
- Visit before the sun has warmed the rooms, if possible.
- Check which rooms have working heat and whether the equipment is included.
- Find out how the home is ventilated and investigate recurring damp before committing.
A sunny terrace can sell you on a home, but it tells you little about getting out of bed on a cool morning. If you plan to spend winter in San Miguel de Salinas, Torrevieja or Orihuela Costa, check how heat reaches the rooms you actually use, how moisture leaves them and what the current owner does to keep them comfortable.
Use regional weather as context
At Alicante–Elche Airport, AEMET’s 1981–2010 January normals show an average daily high of 16.7 °C and average daily low of 6.5 °C. These outdoor observations are regional context, not a forecast for this winter or a reading from any of the three municipalities. [1]
Ask for a morning viewing, ideally before the property has been heated for your arrival. Spend time in the bedrooms, bathroom and any room you would use as an office. Note what the heating was doing and which spaces felt comfortable.
Check the heating room by room
Ask to see the model and test heating mode with permission. A reversible heat pump can heat and cool, but a listing’s reference to air conditioning does not establish the functions or coverage of the equipment installed. A unit in the living room tells you little about a bedroom with its door closed. [2]
On a plan, mark each room’s emitter or air outlet and the controls you can actually use. For new construction, check whether the contract includes an operating system or just provision for future installation. For a resale, ask what stays and request any maintenance records.
Follow the path of fresh air
Spain’s technical guidance on indoor air explains the role of background ventilation in removing moisture generated by normal use. Ask where fresh air enters, how bathrooms and kitchens are ventilated, and which controls or filters occupants need to maintain. [3]
Check whether bathroom extraction works with permission, and ask where it discharges. A recirculating cooker hood does not extract air outdoors. If new windows are planned, ask the installer how fresh air will be provided after the work.
Treat damp as a clue, not a diagnosis
Look at window reveals, external corners, behind furniture where accessible, and around ceilings and skirtings. Note musty smells, peeling paint or fresh decoration over a small area. Those observations can guide questions; they do not distinguish condensation from leaks or water entering from outside.
Ask when the marks first appeared, whether they follow rain or everyday use, and what repairs were made. Request records where available. If stains recur or the explanation is uncertain, commission an independent inspection before budgeting for a fix.
Compare two homes using the same routine
Imagine a winter week: mornings in the bathroom, doors closed during work calls, cooking and drying laundry. List which rooms you would heat, how you would ventilate them and which work would be needed. Ask to see winter consumption in kWh alongside occupancy and heating habits, if available.
An energy certificate is useful background, but it cannot tell you what your particular routine will cost. Compare similar use and keep one-off work separate from running costs. If a feature is essential, confirm its inclusion in writing and test it again at handover.
Questions about winter comfort
Does air conditioning mean the home has heating?
Only if the installed model supports heating. Confirm its model, operation, room coverage and inclusion in the sale. [2]
Does condensation on glass prove a leak?
No. Condensation and water ingress are different possibilities. Check the location and timing and get persistent damp independently assessed.
Can I judge winter comfort from a summer viewing?
Only partly. Inspect the installation and documents, then seek a cool-weather visit or independent assessment if winter use matters.
Sources and further reading
- AEMET — Valores climatológicos normales: Alicante-Elche Aeropuerto, 1981–2010
- IDAE, Guía 025 — La bomba de calor en la rehabilitación energética de edificios, 2023, apartado 2.2.1.5
- Código Técnico de la Edificación — DB-HS con comentarios, HS 3: Calidad del aire interior
Sources checked on 6 November 2026. The checks are practical guidance; the article does not assess any specific building, diagnose damp or estimate bills.