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IAQ

Ductwork

Professional Ductwork Services

Quick Answers

How much does ductwork sealing or replacement cost?

Professional duct sealing costs $800-$2,000 and saves 20-30% on energy bills. Partial duct replacement runs $1,500-$4,000. Complete ductwork installation costs $3,000-$8,000. Energy Star certified practices include testing before/after to verify improvements and real energy savings.

How long does ductwork installation or sealing take?

Duct sealing typically completes in 4-8 hours. Partial repairs/replacement take 1-2 days. Complete ductwork installation for new construction or additions takes 2-4 days. Licensed contractors minimize disruption and clean up thoroughly.

What are signs my ductwork needs repair or sealing?

Warning signs include: high energy bills, uneven room temperatures, excessive dust, musty odors from vents, visible duct damage, rooms that won't heat/cool, or noisy HVAC operation. Leaky ducts waste 20-30% of conditioned air.

Should I seal or replace my ductwork?

Seal if ducts are intact but leaky (saves 20-30% energy). Replace damaged, severely leaking, undersized, or asbestos-wrapped ducts. Manual D calculations ensure proper sizing. ACCA best practices and duct leakage testing verify performance improvements.

Galaxy Heating & Air provides professional ductwork services throughout the San Francisco Bay Area with licensed HVAC contractors using Energy Star certified practices. Duct sealing costs $800-$2,000 and saves 20-30% on energy bills. Complete ductwork installation costs $3,000-$8,000. We perform Manual D calculations for proper sizing, duct leakage testing before/after, and ACCA best practices for optimal airflow and comfort.

Where Can I Get Ductwork Near Me?

Optimize your HVAC system with professional ductwork services! Galaxy Heating & Air Conditioning provides expert duct design, installation, repair, and sealing throughout Pleasant Hill, Oakland, San Francisco, and the Bay Area. Improve comfort, efficiency, and air quality with properly designed ductwork.

Why Do Homeowners Trust Galaxy for Ductwork?

  • Ductwork Design and Installation Specialists
    Proper ductwork is the foundation of HVAC performance, yet it's often the most overlooked component. We've designed, installed, repaired, and sealed ductwork throughout Pleasant Hill, Oakland, San Francisco, and the Bay Area for over 20 years. Our licensed HVAC contractors understand duct sizing, airflow dynamics, and building science. Whether you need new duct installation, repairs, or sealing, we ensure your ducts deliver proper airflow to every room.
  • Professional Sizing Using Manual D Calculations
    Many contractors guess at duct sizes or use outdated "rules of thumb" that result in undersized ducts, excessive noise, and poor performance. We perform professional Manual D calculations to properly size every duct run based on airflow requirements, friction loss, and your HVAC system capacity. Properly sized ductwork ensures quiet operation, even temperatures, and maximum system efficiency.
  • Energy Star Certified Duct Sealing Practices
    Leaky ducts waste 20-30% of heated and cooled air, costing hundreds of dollars annually while reducing comfort. We use Energy Star certified duct sealing practices including professional-grade mastic, metallic tape, and aeroseal technology when appropriate. We perform duct leakage testing before and after sealing to verify improvements and ensure you're getting real results - not just promises.
  • Quality Materials and Expert Installation
    We use premium ductwork materials including insulated flex duct, sheet metal duct, and duct board appropriate for each application. Our installations follow strict building codes, manufacturer specifications, and ACCA best practices. We properly support all ducts, seal all connections, insulate ducts in unconditioned spaces, and ensure professional, long-lasting results that perform reliably for decades.
  • Complete Solutions from Design to Testing
    We don't just install ducts - we provide comprehensive ductwork solutions. This includes design and layout for new construction or additions, repairs for damaged sections, sealing for leaky systems, insulation upgrades, air balancing, and performance testing. Every project includes thorough testing to verify proper airflow, temperature delivery, and system performance before we consider the job complete.
  • Honest Assessments and Fair Pricing
    Not every ductwork problem requires complete replacement. We provide honest assessments of your duct condition and recommend the most cost-effective solution-whether that's sealing, spot repairs, or full replacement. You'll receive clear explanations, upfront pricing, and our satisfaction guarantee. We stand behind our work because we want your HVAC system to perform optimally for years to come.

Why Should You Trust Our Certifications & Warranties?

We're proud to hold exclusive certifications from the industry's most respected manufacturers and organizations, backed by comprehensive warranty protection for your peace of mind.

American Standard Platinum Dealer

Elite customer care certification - less than 3% of contractors nationwide

Diamond Elite Mitsubishi Authorized

Highest level factory certification for installation excellence

5-Year Labor Warranty Included

Every installation includes comprehensive labor coverage - 10-year extended available

BBB A+ & Diamond Certified

Top ratings for business excellence and customer satisfaction

What Ductwork Services Do You Offer?

New Duct Design and Installation

Properly designed ductwork is critical for HVAC performance. We perform Manual D calculations to size ducts correctly, design efficient layouts with minimal restrictions, and install quality duct systems that deliver proper airflow to every room.

  • Manual D calculations for proper duct sizing
  • Efficient duct layout design minimizing runs and turns
  • Insulated flex duct for residential applications
  • Sheet metal ductwork for commercial or custom installations
  • Properly sized supply and return duct systems
  • Strategic register and grille placement
  • All connections sealed with mastic and tape
  • Complete system testing and air balancing
  • Building permits and code compliance included

Duct Sealing and Repair

Leaky ducts waste 20-30% of heated and cooled air. We locate leaks using pressure testing, seal all connections with mastic and tape, repair damaged sections, and verify results with post-sealing testing to ensure maximum efficiency.

  • Professional duct leakage testing using calibrated equipment
  • Mastic sealant application at all connections and seams
  • Metallic tape for additional sealing where appropriate
  • Aeroseal duct sealing technology for inaccessible leaks
  • Repair or replacement of damaged duct sections
  • Disconnected duct reconnection and securing
  • Post-sealing testing to verify improvements
  • Typically saves 20-30% on energy bills
  • Qualifies for utility company rebates in many cases

Duct Insulation Services

Uninsulated ducts in attics, crawl spaces, or garages lose significant energy. We add proper insulation (R-6 or R-8) to reduce heat loss/gain, prevent condensation, and improve overall system efficiency and comfort.

  • R-6 or R-8 insulation for maximum energy savings
  • Vapor barrier installation to prevent condensation
  • Insulation of all ducts in unconditioned spaces
  • Prevents heat gain in summer and heat loss in winter
  • Reduces condensation and moisture issues
  • Improves system efficiency by 15-25%
  • Extends duct lifespan by reducing temperature extremes
  • Required by building codes in many applications

Air Balancing and Optimization

Even with quality ductwork, air balancing ensures proper airflow to all rooms. We measure airflow, adjust dampers, resize problem ducts if needed, and optimize your system for even temperatures throughout your home.

  • Room-by-room airflow measurement and testing
  • Manual damper adjustment for even distribution
  • Identification of undersized or restricted ducts
  • Register and grille evaluation and replacement
  • Static pressure testing throughout duct system
  • Duct resizing or modification where needed
  • Elimination of hot and cold spots
  • Improved comfort and system efficiency
  • Detailed report of findings and adjustments

How Does the Ductwork Service Process Work?

We don't just provide service and leave. Our process is detailed, methodical, and designed for long-term performance.

1

Ductwork Assessment

We start with a comprehensive evaluation:

  • Free in-home consultation and assessment
  • Visual inspection of accessible ductwork
  • Airflow and temperature measurements in each room
  • Duct leakage testing if appropriate
  • Review HVAC system capacity and ductwork design

Professional testing identifies exactly where your ductwork is losing energy and comfort.

2

Solution Design

We recommend specific ductwork solutions:

  • Identify problems and improvement opportunities
  • Design duct sealing, repair, or replacement solutions
  • Recommend insulation and air balancing as needed
  • Provide detailed written estimate with expected savings
  • Schedule work at your convenience

Duct sealing typically pays for itself in 2-4 years through energy savings.

3

Professional Installation

Our experienced team will:

  • Complete duct installation, repair, or sealing
  • Seal leaks using professional Aeroseal or manual methods
  • Install insulation where needed
  • Balance airflow for even temperatures
  • Ensure code compliance and proper installation

We follow industry best practices for professional ductwork service.

4

Testing & Verification

Before we call the job complete, we:

  • Post-work testing to verify improvements
  • Measure airflow and temperature differential
  • Document energy savings and performance gains
  • Final inspection and cleanup
  • Provide documentation of work performed

We verify that ductwork service delivers the comfort and efficiency improvements promised.

When Does Your Ductwork Need Service?

Ductwork is often called the "hidden half" of your HVAC system because it's tucked away in attics, crawl spaces, and walls-out of sight and out of mind. Yet ductwork has a massive impact on comfort, energy bills, and indoor air quality. Studies show that typical duct systems lose 20-30% of heated and cooled air through leaks, poor connections, and inadequate insulation, costing Bay Area homeowners hundreds of dollars annually while making their homes less comfortable. Poor ductwork also circulates dust, allergens, and pollutants from attics and crawl spaces throughout your living spaces. Whether you have an older home with deteriorating ducts or a newer home with improperly installed ductwork, professional duct services can dramatically improve comfort and efficiency. Consider ductwork evaluation and service for your Pleasant Hill, Oakland, or San Francisco home if you experience any of these issues:

  • Uneven Temperatures: Some Rooms Too Hot or Too Cold
    If certain rooms never reach comfortable temperatures no matter how you adjust the thermostat-upstairs bedrooms that bake in summer, back bedrooms that stay freezing in winter, or bonus rooms that are always uncomfortable - your ductwork is likely undersized, leaking, or improperly balanced. Proper duct sizing, sealing, and air balancing eliminate these temperature variations and deliver consistent comfort throughout your home.
  • High Energy Bills Despite Efficient HVAC Equipment
    If you've installed a high-efficiency furnace or air conditioner but your PG&E bills remain stubbornly high, leaky or poorly insulated ductwork is probably wasting the efficiency gains. Duct leaks dump expensive conditioned air into attics and crawl spaces instead of your living areas. Professional duct sealing typically reduces heating and cooling costs by 20-30%, often paying for itself within 2-4 years through energy savings.
  • Excessive Dust Accumulation Despite Regular Cleaning
    If you dust and vacuum regularly but surfaces are covered again within days, your ductwork may be pulling in dust from attics or crawl spaces through leaks and poor connections. Leaky return ducts are especially problematic, pulling in insulation fibers, dust, and allergens that then circulate throughout your home. Duct sealing and proper filtration dramatically reduce dust circulation and improve indoor air quality.
  • HVAC System Runs Constantly But Can't Reach Set Temperature
    If your furnace or AC runs almost nonstop but struggles to maintain comfortable temperatures, severely leaky or undersized ductwork is likely preventing proper air delivery to your rooms. Your HVAC equipment may be perfectly fine, but if the ducts can't deliver the conditioned air effectively, you'll never be comfortable. Duct testing can identify whether repairs, sealing, or replacement is needed.
  • Visible Duct Damage, Disconnections, or Missing Insulation
    If you can see your ductwork in the attic, crawl space, or garage, inspect it for obvious problems: disconnected sections, visible gaps at connections, crushed or torn flex duct, missing or deteriorated insulation, or rodent damage. Any visible damage indicates larger problems throughout the system. Professional duct inspection, repair, and sealing restore proper function and prevent energy waste and air quality issues.
  • Installing New HVAC System or Adding Square Footage
    Whenever you replace your furnace or AC, or add square footage to your home through room additions or finished attics, it's the perfect time to evaluate your ductwork. Existing ducts may be undersized for new high-efficiency equipment, improperly designed, or deteriorated. Professional duct design ensures your new system performs optimally. Adding rooms requires properly sized duct extensions to maintain comfort and efficiency throughout your expanded home.

What Are the Benefits of Ductwork?

  • Improve Energy Efficiency - Stop wasting 20-30% of heated and cooled air
  • Better Comfort in Every Room - Eliminate hot and cold spots
  • Lower Utility Bills - Properly sealed ducts save money
  • Reduce Dust and Allergens - Sealed ducts keep pollutants out
  • Quieter HVAC Operation - Eliminate air leakage noise
  • Professional Design and Installation - Proper sizing and layout
  • Healthier Indoor Environment - Better air quality throughout your home

Where Do You Provide Ductwork Services?

We proudly serve homeowners throughout the San Francisco Bay Area with professional ductwork services. Click on your city to learn more about local service:

HVAC Tools & Calculators

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Frequently Asked Questions

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