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Common AC Questions Answered

Clear, simple explanations to help homeowners make confident decisions.

Why This Page Exists

Most homeowners only replace their AC system a few times in their life. Contractors talk about this stuff every day — which means it’s easy for things to get confusing or overwhelming.

This page gives you straightforward answers to the questions homeowners ask most.

1. How long should an AC system last?

Most systems last 10–15 years in the Houston area. Heat, humidity, and long run‑times shorten lifespan.

A well‑installed system with proper airflow and maintenance can last longer.

2. What brand should I buy?

Brand matters far less than homeowners think.

What matters more is:

  • Proper sizing
  • Proper airflow
  • Proper installation
  • Proper ductwork

A great installation of a mid‑tier brand will outperform a poor installation of a premium brand every time.

3. Why does AC pricing vary so much?

Because different contractors include different things.

Pricing depends on:

  • Equipment efficiency
  • Installation standards
  • Ductwork condition
  • Return air capacity
  • Warranty coverage
  • Labor quality

Two quotes may look similar on paper but be completely different in what’s actually included.

4. What size AC system do I need?

The only correct answer is:

“We’ll run a load calculation.”

Rule‑of‑thumb sizing leads to:

  • Humidity problems
  • Short cycling
  • High energy bills
  • Poor comfort

Proper sizing is one of the most important parts of the job.

5. Why is return air so important?

Your system can only cool the air it can pull in.

If return air is restricted:

  • The system runs hot
  • Efficiency drops
  • Comfort suffers
  • Equipment wears out faster

This is why Majestic checks return air on every job.

Button: Read the Return Air Guide

6. Do I need new ductwork?

Not always — but many homes in Houston have:

  • Undersized returns
  • Leaky ducts
  • Poorly sealed connections
  • Crushed or kinked flex
  • Old metal ducts with gaps

A good contractor inspects your ducts before recommending anything.

7. What’s the difference between SEER ratings?

Higher SEER = more efficient.

But efficiency only matters if:

  • Airflow is correct
  • Ducts are sealed
  • The system is sized properly

A poorly installed 18 SEER system can perform worse than a properly installed 14 SEER.

8. Why does humidity matter so much?

Houston humidity makes your home feel warmer than it is.

A properly sized and installed system:

  • Removes humidity
  • Improves comfort
  • Reduces mold risk
  • Lowers energy bills

Oversized systems struggle with humidity control.

9. Should I repair or replace my AC?

Good contractors consider:

  • Age of the system
  • Cost of the repair
  • Condition of the ductwork
  • Return air capacity
  • Efficiency
  • Reliability

If repairs are frequent or airflow is poor, replacement may be the smarter long‑term choice.

10. What makes Majestic different?

Majestic focuses on:

  • Airflow
  • Ductwork
  • Return air
  • Proper sizing
  • High‑quality installation
  • Clear communication

We don’t guess — we measure.