Planning air conditioning: comparing systems, installation and costs
Air conditioning should suit how your rooms are used and the building itself. Alongside the equipment, positioning, pipework, condensate drainage and connections affect the work and comfort. A comparison becomes useful when every quote covers the same rooms and the same complete, usable installation.
Which solution suits the rooms?
In a split system, an indoor and an outdoor unit work together. A multisplit system can connect several indoor units to one outdoor unit; numbers, combinations and operating modes depend on the model. Several rooms therefore do not automatically require several outdoor units. The professional selects and sizes a suitable solution.
A portable hose-based appliance has different requirements and operating characteristics from a fixed installation. Rental can be a separate option for a temporary need. Ventilation, meanwhile, provides air exchange: without a suitable cooling function it does not replace active room cooling. Vehicle air conditioning and process refrigeration are separate tasks.
| Solution | What matters when comparing |
|---|---|
| Split | Cooling zone, outdoor-unit position and pipe route. |
| Multisplit | Several zones and a unit combination compatible with the model. |
| Ducted or cassette units | Ceiling integration, air distribution and maintenance access. |
| Portable appliance | Heat discharge and suitability for temporary use. |
| Advice | Establish requirements and feasibility before ordering equipment. |
Floor area alone does not determine cooling capacity
Sun exposure, glazing, roof-level position, occupants and heat-producing equipment affect cooling demand. Two rooms of the same size can therefore have different requirements. A fixed capacity per square metre does not replace professional assessment of usage and the building.
Describe which rooms need cooling and when they are used. A bedroom raises different comfort questions from an office floor with substantial equipment. External shading and ventilation at suitable times can reduce heat gains. Air conditioning should address the remaining demand rather than automatically compensate for inadequate heat protection with more capacity.
Plan indoor and outdoor units together
Indoor-unit placement needs suitable air distribution, space and access for care. The airflow should fit the room’s use. The outdoor unit needs a position where air can circulate properly and later servicing is possible. A balcony, façade or roof is not equally suitable without assessment.
Noise also matters to neighbours. Position relative to neighbouring windows, operating hours and mounting affect the outcome. A low sound value on a product sheet does not automatically prove that the complete installation suits its location. Have the actual placement and any necessary acoustic measures assessed.
Pipework, drainage and connections belong in the installation
Connecting the units requires properly planned routes and sometimes wall penetrations. Cooling produces condensate that needs reliable drainage. Depending on the situation, a different drain route or an additional pump may be necessary. This affects space, care and cost.
Clarify who provides the electrical connection, drilling, mounting and reinstatement of affected surfaces. Where equipment has already been purchased, the business should first check the model, supplied parts and suitability. Precharged lines or quick connectors do not make every installation a straightforward customer DIY task.
Clarify local requirements before ordering
Fixed air-conditioning systems and outdoor units can be subject to building and energy requirements. The procedure depends on the location and project. Establish the responsible municipality, required documents and any owner or management consent early. An online quote does not replace a necessary approval.
Refrigerant selection and handling are also subject to technical and legal requirements. The professional assesses which solution is currently appropriate and what documentation or notifications are needed. Customers do not have to select a refrigerant or determine a statutory installation category themselves.
Distinguish equipment prices from installed costs
An equipment price does not automatically include pipework, electrical work, installation and commissioning. Cooling zones, unit combinations, routes and access affect the complete cost. Compare the same finished installation with VAT and additional work clearly identified.
As a narrowly scoped illustration, one published project example from a Swiss business specifies two indoor units, one outdoor unit and rooms of 17 and 38 m² at CHF 7,480 including VAT. Pipe routes were 7 and 12 m; the site-provided electrical connection was excluded. This undated example is neither a Swiss average nor a binding price for your rooms.
Consider operation and care as well. Running hours, the desired temperature and efficiency affect electricity use. A flat annual electricity estimate without that information would be unhelpful. Equipment with both cooling and heating should be compared against the operating modes you actually want.
| Item | What to establish in the quote |
|---|---|
| Equipment | Exact models, number of indoor and outdoor units, and delivery. |
| Pipework and drainage | Included lengths, penetrations and condensate drainage. |
| Connections | Electrical connection and other site-provided work. |
| Installation and handover | Mounting, commissioning, checks and operating instructions. |
| Additional work | Access, auxiliary equipment, removal of existing units and any documentation. |
Information that makes quotes comparable
Known room information is enough for a first assessment. Technical sizing and final installation details are established afterwards.
- Rooms. State the number, approximate floor area and use of the zones needing cooling.
- Order. Distinguish a new system, replacement and installation of equipment already purchased.
- Building. Describe the known situation and possible outdoor-unit location.
- Result. Specify cooling only or an additional heating function, and preferred timing.
From requirements to usable air conditioning
Handover should include understandable instructions, agreed documentation and a clear maintenance requirement. A filter or cooling function does not guarantee medical air purification or complete fresh-air exchange.
- Assess the need. Consider rooms, use and existing heat protection together.
- Define the installation. Plan equipment, positions, pipework, drainage and necessary checks.
- Compare proposals. Check the same complete scope and stated exclusions.
- Install and hand over. Agree professional installation, commissioning and operating guidance.
Frequently asked questions
Which air conditioning suits several rooms?
A multisplit system can operate several indoor units with one outdoor unit. The combination and number depend on the model and cooling demand. The business should plan the rooms together; a large unit in one room does not automatically cool every adjoining room suitably.
Can I have air conditioning I already purchased installed?
Yes, you can request installation. The business checks the model, available parts and feasibility before confirming. Supply, additional components and commissioning should be clearly distinguished.
Do I need permission?
Fixed installations and outdoor units can require approvals and supporting documents. The procedure depends on location and project. Involve the municipality and any necessary owner or management consent early.
Is air conditioning also ventilation?
Not automatically. Many room appliances cool recirculated indoor air. Fresh-air supply and active cooling are different functions. If air exchange matters, the proposed solution must expressly provide it.
What particularly affects installation costs?
The number and position of units, pipe routes, wall penetrations, condensate drainage, electrical connection and access affect the work. Compare a clearly described complete scope rather than equipment prices alone or an unclear starting price.
Can air conditioning also provide heating?
Many suitable systems offer heating as well. Capacity, efficiency and permitted use depend on the model and building. A requested heating function does not automatically replace planning for the building’s heating system.
