Installing a new air conditioning system isn’t just about staying cool—it is a holistic investment in comfort, energy efficiency, system longevity, and property value. At 100 % Plumbing, we handle air conditioning installations, repairs, and maintenance across the Costa Blanca region. (See our Air Conditioning service).
If the installation is done incorrectly, even a good unit won’t perform as expected. Common consequences of poor installation include uneven cooling, frequent breakdowns, high electricity usage, and voided warranties. That’s why it’s essential to consider multiple factors before committing to a specific model or installer.
How to choose the right size air conditioner for your home
What is a load calculation?
A “load calculation” (often known as Manual J in HVAC design) estimates how much cooling capacity your building needs. It accounts for:
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The floor area and volume of each room
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Insulation quality in walls, roof, and floors
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Window size, orientation, and glazing type
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Solar gain from sunlight
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Internal heat sources (appliances, lighting, occupants)
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Air infiltration and ventilation
This calculation yields an appropriate cooling capacity in BTU/h or kW to ensure comfortable temperatures without overwork.
Risks of under- or oversizing your AC unit
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Oversized units: They cool too fast, then shut off prematurely (short cycling), which leads to inefficient operation, increased wear, and poor dehumidification.
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Undersized units: They struggle to achieve desired temperatures in hot weather and run continuously, increasing electricity costs and stress on components.
A correctly sized unit avoids both problems and gives you balanced performance and energy efficiency.
Understanding energy efficiency ratings (SEER, EER, COP)
How SEER and EER affect your electricity bills
When comparing AC units, you’ll see efficiency ratings such as SEER (Seasonal Energy Efficiency Ratio) and EER (Energy Efficiency Ratio). The higher these ratings, the more cooling output you get per unit of electricity input, which translates directly into energy savings.
Why high-efficiency ACs pay off over time
High-efficiency models may cost more initially but often pay for themselves over 5–10 years via lower electricity bills. Furthermore, some governments and utility programs offer rebates or incentives for energy-efficient units. For reference, the U.S. Department of Energy publishes official guidance around HVAC efficiency and system selection (e.g. on their Energy Saver site). Incorporating an efficient AC in your home or business helps reduce your carbon footprint as well.
Types of air conditioning systems explained
Split vs. Multi-Split vs. Ducted Systems
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Split systems (also “mini‑split”): one outdoor unit, one indoor unit. Ideal for individual rooms or small areas.
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Multi‑split systems: one outdoor unit connects with multiple indoor units—great for zoning multiple rooms.
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Ducted / central systems: hide the equipment behind ceilings or in false ceilings; ideal if the building already has ductwork or can accommodate it.
Is a VRF system right for your property?
For larger homes, apartments, or commercial buildings, VRF / VRV (Variable Refrigerant Flow / Volume) systems are a sophisticated option. They allow individual temperature control per zone and adapt refrigerant flow for efficiency. However, VRF systems require more design precision and are generally more expensive to install.
AC brands, warranties, and what to look for
Key questions to ask before choosing a brand
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What is the warranty on the compressor and on other parts?
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Is spare parts support available locally?
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Does the manufacturer certify the installer (so your warranty remains valid)?
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How is the brand’s service network and track record in your region?
Importance of certified installation partners
You want an installer who is not only skilled but certified. A certified installer helps ensure your system meets manufacturer standards, which protects your warranty. At 100 % Plumbing, our team is experienced in both plumbing and HVAC systems, which ensures integrated installation and servicing.
Best practices for AC unit placement and installation design
Outdoor unit placement tips
Choose a location with adequate airflow, protection from direct sun, and sufficient space for maintenance access. The base should be level, stable, and free from obstructions like shrubs or walls that could block airflow.
Minimizing ducting losses and noise
Design piping and duct runs to be as short and straight as possible, with proper insulation and minimal bends. For ducted systems, use ductwork sized with careful attention to pressure drop. Place indoor units away from bedrooms or quiet areas, or use vibration damping techniques to reduce noise.
Smart thermostats, zoning, and AC automation
Control your cooling: smarter, not harder
Smart thermostats (Wi-Fi enabled, learning, or programmable) let you adjust settings from your phone, create schedules, and monitor system usage. This is especially beneficial for vacation homes or properties left idle at times.
Benefits of AC zoning systems
By dividing a home into zones, you can cool only the needed areas, improving comfort control and reducing wasted energy. Multi-split or VRF systems typically support zoning.
Initial vs. lifetime cost of your AC installation
Breaking down upfront and operational costs
Don’t focus just on the purchase and install cost. To estimate the full investment, include:
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Electricity consumption over 10–15 years
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Annual maintenance and servicing
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Replacement parts or repairs
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Filter changes
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Potential downtime and premature failure
How to calculate your system’s ROI
Create a projection combining initial investment, expected yearly energy savings (based on efficiency difference), and maintenance costs. A more efficient system often shows a better return on investment over its useful life.
We also offer Aircon Maintenance plans to help extend system life and maintain peak performance, which can lower total lifecycle costs.
Legal codes, permits, and HVAC regulations to know
Do you need a permit to install AC?
In many jurisdictions, installations that involve electrical modifications or refrigerant work require permits or certification. Especially handling of refrigerants (F‑gas or local equivalents) often requires licensed technicians.
Why hiring a certified HVAC technician matters
Improper installation can void warranties or introduce safety hazards. Moreover, local authorities may refuse to approve installations that don’t meet code. Our emergency callout team sometimes responds to failures from noncompliant installations—prevent that risk by using qualified professionals.
How to find a reliable air conditioning installer
Questions to ask your AC contractor
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Are you licensed, insured, and bonded?
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Can you provide references or past project photos?
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What is included in your quote: labor, materials, warranty, commissioning?
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Do you offer maintenance contracts?
Why experience in HVAC and plumbing matters
Because AC systems often tie into condensate drainage, electrical supply, roof penetrations, and structural supports, a contractor that understands plumbing, HVAC and building integration (like 100 % Plumbing) is a major advantage.
AC maintenance tips to maximize performance
What’s included in a professional AC service?
A complete maintenance check typically includes:
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Cleaning or replacing filters
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Inspecting coil condition
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Checking refrigerant pressures and top-up if needed
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Checking for leaks
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Cleaning condensate drains
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Testing electrical connections and safety devices
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Inspecting ductwork or piping insulation
How often should your aircon be checked?
It’s wise to schedule a full service at least once per year. If your system works heavily (hot climates, continuous use), semi‑annual checks may be warranted to avoid breakdowns and maintain efficiency. With our maintenance plans, clients on the Costa Blanca can enjoy priority scheduling and preventive care so the system lasts longer and runs better.
Ready for installation? Get a free AC assessment
If you’re planning to install or upgrade air conditioning, start with a site visit and free assessment. We’ll measure your space, analyze load needs, review installation layout, and discuss equipment options.
To get started, simply contact us. 100 % Plumbing is your trusted partner for air conditioning installations, maintenance, and plumbing needs across the Costa Blanca.
