Buying a new air conditioner is one of the most important comfort decisions you can make for your home. In Des Moines, where summers can bring high heat, sticky humidity, and long stretches of heavy system use, choosing the right AC system matters for comfort, efficiency, and long-term reliability.
Holt Plumbing & Heating, Inc. has proudly served Des Moines and surrounding Iowa communities for decades with trusted plumbing, heating, cooling, electrical, and indoor air quality solutions. If your current air conditioner is aging, struggling, or costing more to run each year, understanding what to look for before a new AC installation can help you make a smart investment.
Below are six of the most important factors to consider when selecting a new AC system for your Des Moines home.
Choose the Right AC Size for Your Home
One of the biggest mistakes homeowners can make is assuming that bigger always means better. An air conditioner must be properly sized for the home it serves. If the system is too small, it may run constantly and still fail to keep your home comfortable. If it is too large, it may cycle on and off too quickly, wasting energy and leaving humidity behind.
Proper AC sizing depends on several home-specific details, including:
- Square footage
- Insulation levels
- Window size and placement
- Ceiling height
- Ductwork condition
- Home layout
- Sun exposure
- Number of occupants
- Existing comfort problems
A professional HVAC contractor should perform a load calculation before recommending equipment. This helps determine how much cooling capacity your home actually needs.
For Des Moines homeowners, sizing is especially important because humidity control is just as important as temperature control. An oversized system may cool the air quickly but fail to run long enough to remove moisture properly. That can leave your home feeling clammy, even when the thermostat says the temperature is right.
Consider Energy Efficiency Ratings
Energy efficiency plays a major role in how much your air conditioner costs to operate over time. While a higher-efficiency unit may cost more upfront, it can reduce monthly utility bills and provide better long-term value.
When comparing systems, homeowners should pay attention to efficiency ratings such as SEER2. The higher the SEER2 rating, the more efficiently the system converts electricity into cooling performance.
A more efficient air conditioner can help:
- Lower summer energy bills
- Reduce system strain
- Improve comfort during long run times
- Support better humidity control
- Reduce environmental impact
In a climate like Des Moines, where air conditioners may run heavily during hot summer weather, efficiency can make a noticeable difference.
However, the highest-rated system is not always the best choice for every home. The right option depends on your budget, home size, expected usage, and long-term goals. Holt Plumbing & Heating can help homeowners compare efficiency options honestly so they understand both upfront costs and potential savings.
Evaluate Your Existing Ductwork
A new air conditioner can only perform as well as the ductwork connected to it. If your ducts are leaking, undersized, poorly insulated, or blocked, even a high-quality AC system may struggle to cool your home effectively.
Before installation, your contractor should inspect the duct system for issues such as:
- Air leaks
- Damaged sections
- Poor insulation
- Restricted airflow
- Improper duct sizing
- Dust and debris buildup
- Uneven distribution between rooms
Ductwork problems can lead to hot and cold spots, weak airflow, higher energy bills, and reduced indoor comfort. In some homes, duct improvements or modifications may be recommended before or during AC installation.
This is especially important in older Des Moines homes, where duct systems may have been designed for older equipment or modified over the years. If your current system has always struggled to cool certain rooms, the issue may not be the air conditioner alone. It may be the airflow system behind the walls, ceilings, or basement.
Think About Humidity Control and Indoor Air Quality
Iowa summers are not just hot. They can be humid, and that humidity affects how comfortable your home feels.
A properly installed air conditioner helps remove moisture from indoor air as it cools. However, some homes need additional support to manage humidity and indoor air quality.
When choosing a new AC system, consider whether your home also needs:
- Whole-home dehumidification
- Better air filtration
- Air purification
- Humidity control equipment
- Improved ventilation
- Duct cleaning or sealing
Excess indoor humidity can cause:
- Sticky, uncomfortable air
- Musty odors
- Mold and mildew concerns
- Dust mite growth
- Warped wood surfaces
- Poor sleep quality
- Increased strain on the AC system
On the other hand, better air filtration and purification can help reduce airborne particles, allergens, and indoor pollutants.
Because Holt Plumbing & Heating also provides indoor air quality solutions, homeowners can look at the full comfort picture instead of focusing only on cooling equipment. A new AC installation is a smart time to improve the way your whole home handles air, moisture, and comfort.
Compare System Type and Features
Not every home needs the same type of cooling system. Before buying, it is important to understand your options.
Central Air Conditioning
Central AC is a common choice for homes with existing ductwork. It provides whole-home cooling through a single system and distributes conditioned air through vents.
Central AC may be a good fit if:
- Your home already has ducts
- You want consistent whole-home cooling
- Your furnace is still in good condition
- You prefer a traditional cooling setup
Heat Pumps
A heat pump can cool your home in summer and provide heating during cooler months. Modern heat pumps can be a strong option for homeowners interested in energy efficiency and year-round comfort.
A heat pump may be worth considering if:
- You are replacing both heating and cooling equipment
- You want one system for cooling and supplemental heating
- Energy efficiency is a top priority
- You are interested in a dual-fuel setup with a furnace
Ductless Mini-Splits
Ductless systems are ideal for rooms or spaces where traditional ductwork is not practical. They are often used in additions, finished basements, garages, sunrooms, and older homes.
Learn more about the costs of ductless mini-split installation and more.
Ductless systems may be a good solution if:
- Some rooms never cool properly
- You do not have existing ductwork
- You want zoned temperature control
- You are finishing or remodeling part of the home
Comfort Features to Consider
Modern systems may include features such as:
- Variable-speed operation
- Two-stage cooling
- Smart thermostat compatibility
- Quieter performance
- Improved humidity control
- Advanced filtration options
These features can improve comfort, reduce energy use, and make the system easier to manage.
Choose the Right HVAC Contractor
The quality of installation is just as important as the equipment itself. Even a top-rated air conditioner can perform poorly if it is installed incorrectly.
A professional AC installation should include:
- Accurate load calculation
- Proper equipment selection
- Ductwork evaluation
- Correct refrigerant charging
- Secure electrical connections
- Proper drainage setup
- Thermostat setup
- Full system testing
- Clear homeowner guidance
Choosing a licensed and insured HVAC contractor helps protect your investment and ensures the work is completed safely.
Des Moines homeowners should look for a contractor with local experience, strong community reputation, and a clear commitment to honest communication. Holt Plumbing & Heating has served the greater Des Moines area for decades, helping homeowners choose and install reliable cooling systems built for Iowa weather.
When Is It Time to Replace Your AC?
Many homeowners are unsure whether they need another repair or a full replacement. While every situation is different, replacement may be the better choice if your current system is nearing the end of its service life.
You may want to consider AC replacement if:
- Your system is more than 10 to 15 years old
- Repairs are becoming frequent
- Your energy bills keep rising
- Your home has uneven cooling
- The system uses outdated refrigerant
- The AC runs constantly
- Major components have failed
- Your home never feels comfortable in summer
If the cost of repair is high and the system is older, investing in a new air conditioner may provide better long-term value.
What to Expect During AC Installation
A professional AC installation should feel organized and straightforward. Before work begins, your technician should explain the system being installed, the expected process, and any changes needed to your existing setup.
A typical installation may include:
- Removing the old outdoor unit
- Installing the new condenser
- Connecting the indoor coil if needed
- Updating refrigerant lines
- Making electrical connections
- Connecting condensate drainage
- Installing or configuring the thermostat
- Testing airflow and temperature performance
- Reviewing system operation with the homeowner
Most standard installations can be completed efficiently, though complex projects may require additional time if ductwork, electrical updates, or indoor equipment changes are involved.
Why Professional Installation Protects Your Investment
AC installation is not a simple plug-and-play project. Proper performance depends on sizing, airflow, refrigerant charge, electrical safety, and system setup.
Poor installation can lead to:
- Higher utility bills
- Shorter equipment lifespan
- Frequent breakdowns
- Poor humidity control
- Weak airflow
- Uneven cooling
- Warranty problems
Professional installation gives your system the best chance to operate safely, efficiently, and reliably for years to come.
Why Des Moines Homeowners Choose Holt Plumbing & Heating
For generations, homeowners throughout Des Moines, West Des Moines, Urbandale, Waukee, Ankeny, Clive, and nearby communities have trusted Holt Plumbing & Heating for dependable home comfort solutions.
Homeowners choose Holt because of the company’s:
- Decades of experience in Des Moines
- Licensed and insured technicians
- Local understanding of Iowa weather
- Honest system recommendations
- Quality installation practices
- Reliable AC repair and maintenance services
- Full plumbing, heating, cooling, and indoor air quality support
Whether you need AC installation, ductless cooling, heat pump service, or seasonal maintenance, Holt provides skilled service with the care and craftsmanship local families expect.
Get Expert Help Before You Buy a New AC
A new air conditioner is a major investment, but the right system can improve comfort, reduce energy waste, and help your home handle Des Moines summers more reliably.
Before you buy, make sure you understand the six key factors: sizing, efficiency, ductwork, humidity control, system type, and installation quality. With expert guidance, you can choose a cooling system that fits your home, your budget, and your long-term comfort needs.
Call Holt Plumbing & Heating today to schedule an AC installation consultation in Des Moines and experience the reliable service Iowa homeowners have trusted for decades.
