Single-Split Systems
Climate units for individual rooms such as bedrooms, living rooms or offices – ideal for retrofits.
Air Conditioning Installation & Maintenance in Wels
Constant Sanitär & Elektro installs and maintains air conditioning systems in Upper Austria and Salzburg. Whether single-split for individual rooms, multi-split for the whole apartment or VRF systems for commercial buildings – we advise, plan, install and maintain your air conditioning. Energy-efficient cooling and heating with state-of-the-art technology and smart home integration.
Comfortable indoor climate all year round
Modern air conditioning not only provides cool air in summer but also improves air quality and can heat depending on the system. We plan and install systems that are optimally matched to your rooms.
From a single-split unit in the bedroom to a multi-split solution for office buildings, we handle installation, commissioning and regular maintenance – including advice on optimal unit configuration.
Cooling & Dehumidifying
Energy-efficient climate systems with quiet operation and smart app control.
Service overview
What we offer
Multi-Split Systems
One outdoor unit supplies several indoor units – perfect for single-family homes and smaller commercial buildings.
VRF/VRV Systems
Variable refrigerant flow systems for larger office and commercial buildings with flexible zone control.
Installation & Commissioning
Professional installation, leak testing and instruction in operating your system.
Maintenance & Refrigerant Service
Cleaning, leak testing and refrigerant check for reliable operation and high efficiency.
Smart Home Integration
Control your air conditioning via app or voice assistant and integration with existing smart home systems.
Finding the right air conditioning system
Room size and cooling capacity
| Room size (approx.) | Cooling capacity (kW) | Type |
|---|---|---|
| up to 20 m² | 2.0–2.5 | Single-split |
| 20–30 m² | 2.5–3.5 | Single-split |
| 30–45 m² | 3.5–5.0 | Single-split |
| 2–3 rooms | combined | Multi-split |
As of 2026. Indicative – heat sources (sun, appliances) and insulation affect the choice. We advise on site.
Frequently asked questions
What does an air conditioning system cost for an apartment?
A single-split system for one room (up to 35 m²) costs including installation approx. €2,500–€4,000. Multi-split systems for 2–3 rooms cost approx. €5,000–€9,000. Cost depends on manufacturer, cooling capacity and installation effort. We provide an individual quote after a site visit.
Can an air conditioner also heat?
Yes, modern split systems work as air-to-air heat pumps and can both cool and heat. They are ideal as supplementary heating in shoulder seasons (autumn/spring) and are very energy-efficient with an SCOP of up to 5.0. That means: from 1 kW of electricity you get up to 5 kW of heat.
How loud is a modern air conditioning unit?
The indoor unit of a modern split system runs at around 19–22 dB(A) in the lowest mode – about whisper level. The outdoor unit reaches around 45–50 dB(A), similar to a quiet conversation. We ensure optimal placement during installation for minimal noise.
How often does an air conditioner need servicing?
We recommend professional servicing once a year, ideally before the cooling season. Service includes filter cleaning, refrigerant level check, disinfection and function test. Regular servicing extends lifespan (15+ years) and keeps efficiency high.
Can I control the air conditioner from my phone?
Yes, most modern air conditioners offer WiFi modules and apps for smartphone control. We can also integrate air conditioning into existing smart home systems (KNX, Busch-Jaeger free@home, Loxone, Home Assistant) on request. Temperature, timer and mode can then be controlled conveniently via app or voice assistant.
Benefits
Benefits of professional air conditioning
Comfortable temperatures in summer and optional heating in winter.
Better air quality through filtering and dehumidification of room air.
Energy-efficient units with low power consumption.
Convenient control via remote, app or smart home.