What is the difference between SEER2 and EER2, and which matters more in Arizona heat?
Both SEER2 and EER2 measure energy efficiency, but they evaluate performance under different conditions.
- SEER2 (Seasonal Energy Efficiency Rating): Measures efficiency over an entire cooling season with varying temperatures. This is the number most commonly used in marketing and comparisons.
- EER2 (Energy Efficiency Rating): Measures efficiency at a consistent high outdoor temperature (typically around 95°F and above), which better reflects real-world performance in extreme heat.
In desert climates like Arizona—where temperatures regularly exceed 105°F—EER2 becomes a more accurate indicator of how your system will actually perform.
Many systems with high SEER2 ratings achieve that efficiency under mild conditions but may not perform as efficiently during extreme heat. A system with a strong EER2 rating will:
- Maintain better performance during peak summer temperatures
- Operate more efficiently when you need it most
- Provide more consistent cooling under heavy demand
At Precision Air & Plumbing, we help homeowners evaluate both ratings to ensure the system you choose performs efficiently in real desert conditions—not just on paper.
Why is there such a large price range for new equipment?
Every home is different, which means every installation is different. While many homes require similar base components, some homes need additional upgrades to properly support a new system.
These upgrades can include:
- Undersized ductwork that needs to be increased for proper airflow
- Line set sizing or replacement depending on the existing system
- Roof or attic penetrations that need to be modified
- Fixing existing hot or cold spots caused by duct design
Unlike a plug-and-play appliance, HVAC systems must be customized to your home.
In addition, equipment itself varies. Some systems are more energy efficient, quieter, or provide better comfort control than others. Different brands and feature levels also impact pricing.
The best way to determine exact pricing is to have a field supervisor evaluate your home and provide options based on your needs and budget.
Why does pricing vary from company to company?
Pricing differences typically come down to quality, process, and support.
Some key factors include:
- How quickly the system can be installed
- The quality of materials used
- The training and skill level of the technicians
- Installation procedures followed
The most important day of an air conditioner’s life is the day it’s installed. Poor installation can lead to long-term issues and higher costs.
At Precision Air & Plumbing, we follow manufacturer specifications and go beyond standard practices by:
- Brazing with nitrogen to prevent contamination
- Cleaning existing line sets to remove debris
- Flushing and clearing condensation lines
- Adding vibration absorption to reduce noise
- Verifying airflow, charge, and system performance
We also test every system using third-party verified software to ensure it’s operating correctly in your home.
Additionally, post-installation support matters. Having a company that stands behind their work and is available when needed provides long-term value.
How long does a typical installation take?
Most standard system replacements are completed in one full day.
If additional work is required—such as ductwork modifications—the project may take 2–3 days depending on the scope.
How do I know which system is right for my home?
The best system depends on your goals, budget, and how long you plan to stay in the home.
- Entry-level systems: Great for budget-conscious homeowners or short-term ownership. Still offer improved efficiency and performance over older systems.
- Mid-tier systems: Provide better efficiency, quieter operation, and improved airflow control. Often include smart features and enhanced warranties.
- Top-tier systems: Deliver maximum comfort, quieter performance, better humidity control, and advanced features. These systems may also qualify for rebates and tax credits when available.
A professional evaluation helps match the right system to your specific needs.
How do I know what size air conditioning unit I need for my home?
System sizing depends on several factors, and it’s important to get it right.
In the past, many contractors used rules of thumb—such as matching the existing unit or sizing at approximately 1 ton per 400 square feet. However, these methods are no longer reliable due to improvements in home efficiency.
The correct way to determine system size is by performing a heat load calculation (Manual J).
This process takes into account:
- Your home’s square footage and layout
- Insulation levels and construction type
- Window size, type, and sun exposure
- Number of occupants in the home
- Appliances, pets, and internal heat sources
At Precision Air & Plumbing, this calculation is standard practice. Proper sizing ensures efficiency, comfort, and system longevity.
What happens to my old system?
Your old system must be disposed of according to EPA regulations, including proper handling of refrigerant.
Precision Air & Plumbing uses a certified third-party company to:
- Remove your system the same day
- Properly recover refrigerant
- Dispose of equipment in compliance with regulations
This ensures there is no liability for you or the company.
Can I finance a new air conditioning system?
Yes. We offer multiple payment options including:
- Cash, check, and credit card
- Long-term financing with low monthly payments
- Promotional options, including interest-free plans (with approved credit)
Our team can help you find the best option for your situation.
What brand is the best?
Today, most major manufacturers use many of the same internal components, such as compressors, motors, and coils.
Because of this, the biggest difference is not the brand—it’s how the system is installed.
A properly installed system will last longer, perform better, and require fewer repairs. Improper installation can lead to premature failure regardless of brand.
How do I choose the right contractor?
Choose a contractor who provides transparency, quality, and long-term value.
Things to look for:
- Clear explanations of what’s included
- Detailed and comparable estimates
- Proven installation processes
- Strong customer support after the install
Not all quotes are equal, and not all installations are the same. The right contractor will take the time to do it correctly and stand behind their work.
What accessories should I consider with my new system?
There are several accessories that can improve performance and protect your system:
- Surge protectors / voltage monitors: Protect sensitive components
- Soft start or hard start kits: Reduce strain on the compressor
- Float switches: Prevent water damage from clogged drain lines
A good contractor will help you determine which accessories make sense for your home.
Will a new system lower my energy bill?
Yes, in most cases. Older systems lose efficiency over time, especially after 10–15 years.
New systems are designed to use less energy while providing better performance. Savings depend on:
- The efficiency of the new system
- Your current system’s condition
- Your home’s insulation and ductwork
Most homeowners see noticeable improvements in energy usage.
What is SEER2 and why does it matter?
SEER2 measures how efficiently your air conditioning system operates.
Higher SEER2 ratings mean:
- Better energy efficiency
- Lower operating costs
Higher efficiency systems may cost more upfront but can reduce long-term energy expenses.
How long will a new air conditioning system last?
Most systems last 10–15 years, depending on:
- Installation quality
- Maintenance
- Usage
- Environmental conditions
Proper installation and maintenance are key to maximizing lifespan.
Do I need to replace my ductwork when I replace my system?
Not always, but it depends on the condition and design of your ductwork.
Ductwork may need attention if:
- It is undersized
- It has leaks or damage
- It causes uneven temperatures
Often, targeted repairs or modifications can significantly improve performance.
Will a new system make my home more comfortable?
Yes. New systems improve more than just temperature.
Benefits can include:
- More even cooling
- Better humidity control
- Quieter operation
- Improved airflow
Higher-end systems offer even greater comfort control.
What kind of maintenance does a new system require?
Routine maintenance keeps your system running efficiently and helps prevent breakdowns.
Typical service includes:
- Cleaning components
- Checking refrigerant levels
- Inspecting electrical systems
- Verifying airflow
Most systems should be serviced 1–2 times per year.
What warranties come with a new system?
Most systems include:
- Manufacturer warranty (typically up to 10 years on parts with registration)
- Workmanship warranty from the installing contractor
Coverage varies, so it’s important to understand what is included.
Can I replace just part of my system instead of the whole thing?
In some cases, yes—but it’s not always recommended.
Mixing old and new components can:
- Reduce efficiency
- Cause performance issues
- Void warranties
A full system replacement usually provides the best long-term results.
When is the best time to replace my system?
The best time is before your system fails, typically during spring or fall.
Benefits include:
- Better scheduling availability
- Potential promotions or rebates
- Avoiding emergency situations
Planning ahead gives you more control and options.
Are rebates or tax credits available for new systems?
In many cases, yes.
You may qualify for:
- Utility rebates (SRP, APS, etc.)
- Federal tax credits (when available)
Higher efficiency systems are more likely to qualify. Your contractor can help identify current programs.
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