Urbana, IL Duct Services: 3 Best Duct Sealing Options

*Estimated Read Time: 10 minutes* Leaky ducts waste energy, create hot and cold spots, and pull dusty air from attics or crawlspaces. If you are searching for duct sealing methods, here are three proven solutions to tighten your system and restore comfort. We will explain how each method works, when to use it, and how proper sealing pairs with duct cleaning and repairs for the best indoor air quality. Ask about membership perks for scheduled maintenance and priority service. ## Why Duct Sealing Matters in Central Illinois Air leaks in supply and return ducts drive up bills and reduce comfort. The U.S. Department of Energy reports typical homes lose 20 to 30 percent of the air that moves through the duct system due to leaks, holes, and poorly connected ducts. That lost air is paid-for heating and cooling. In Champaign-Urbana, many homes have basements or crawlspaces with older sheet metal runs. Farm dust and spring pollen can enter through return leaks. In winter, leaky supply ducts leave back bedrooms cold. In summer, the AC runs longer and still cannot keep up. Sealing is one of the fastest ways to improve room-to-room balance, trim runtime, and reduce dust. Sealing also protects your equipment. When return leaks pull in unfiltered air, coils get dirty and airflow drops. That means more repairs, higher static pressure, and a system that strains. Pair proper sealing with filter changes and scheduled maintenance, and your system can last longer with fewer surprises. > "The crew that came to clean our ducts were very professional and diligent to be sure they cleaned every vent and both furnaces... Our house smells so much cleaner and feels warmer." ## The 3 Primary Duct Sealing Methods There are three main ways to seal residential ductwork. Each has a place. Your choice depends on access, duct material, leakage level, and project goals. 1. Mastic sealant brushed on seams and joints. 2. UL 181-rated foil tape applied to clean, oil-free metal. 3. Aerosol-injected sealant that seals leaks from the inside. We will break down how each works, pros and cons, and when we recommend it in Champaign, Urbana, Savoy, and nearby communities. ## Method 1: Mastic Sealant for Permanent Seals Mastic is a thick, fiber-reinforced sealant that you brush over duct seams, joints, and small gaps. It cures to a flexible, durable layer that resists vibration. For metal trunks, panned returns, and takeoffs, mastic is often the gold standard. How it is applied: - Clean the surface to bare metal. Remove dust and old tape. - Tighten screws or add fasteners at loose joints. - Brush mastic over seams at least 1 inch wide. Embed mesh on larger gaps. - Allow to cure, then insulate as needed. Pros: - Long-lasting, does not dry out quickly. - Handles odd shapes and irregular gaps. - Great on elbows, boots, and transitions. Cons: - Messy if rushed. Needs proper prep. - Not designed for large holes or crushed sections. Those need repair first. Local tip: Many Urbana ranch homes have panned returns using floor joists. These leak a lot. Mastic and metal closure panels fix this. Sealing those returns often reduces dust and improves furnace performance right away. > "The installers... did a great job with ductwork changes and installing the new system... We very much appreciated their attention to detail and feel they did the job right!" ## Method 2: UL 181-Rated Foil Tape for Clean Metal Joints Not all tape is equal. Hardware-store cloth duct tape dries, peels, and fails. For HVAC, use UL 181-rated foil tape. It bonds to clean, oil-free metal and creates an air-tight seal when installed correctly. We like foil tape for straight seams, drive and S joints, and to back up mastic on complex spots. How it is applied: - Wipe down the joint. Remove oils and dust. - Pre-measure and cut tape lengths. Avoid stretching. - Apply with firm pressure. Use a squeegee for full contact. - Seal edges with mastic in high-heat areas if needed. Pros: - Fast and clean on accessible metal ducts. - Reflective foil tolerates temperature swings. - Ideal for supplemental sealing before insulating. Cons: - Poor results on dirty or painted surfaces. - Not ideal on flexible duct or textured board without prep. Best uses in our area: Basement trunk lines and visible runs near the furnace or air handler. We often combine foil tape on straight seams with mastic at joints and takeoffs for a belt-and-suspenders approach that lasts. ## Method 3: Aerosol-Injected Duct Sealing for Hidden Leaks Some leaks hide behind drywall or in tight crawlspaces where hand sealing is not practical. Aerosol-injected sealing solves this by pressurizing the ducts and releasing a fog of sealant particles. The particles only accumulate at leak edges, building a seal from the inside. How it works at a high level: - Temporarily block registers and returns. - Attach equipment to pressurize the system. - Inject sealant aerosol. It targets and seals leaks up to a defined size. - Measure leakage before, during, and after to show results. Pros: - Reaches hidden joints you cannot access. - Provides measured leakage reduction data. - Useful in finished homes where opening walls is not desired. Cons: - Not a fix for collapsed or disconnected ducts. - Requires preparation and temporary system downtime. When to consider it: Older homes in Champaign with finished basements, complex multi-branch runs, or when a blower door test shows significant leakage you cannot reach by hand. We still repair obvious damage first, then use aerosol sealing to finish the job. ## Sealing vs. Repair vs. Replacement: How to Decide Sealing is powerful, but it is not a cure-all. We start with inspection to find the right path. - Choose sealing when ducts are intact but leaky at seams, joints, and boots. - Choose repair when there are kinks, crushed sections, or missing caps. - Choose partial replacement when ducts are undersized, asbestos-lined, or rusted through. A quick decision guide: 1. Hot or cold rooms, visible gaps at boots, and whistling at joints point to a sealing-first strategy. 2. High static pressure, loud airflow, and small return size may require redesign or replacement. 3. Excess dust and musty smells call for sealing plus duct cleaning and filter upgrades. Our team uses a high-power vacuum truck to remove dust, dirt, and dander before or after repairs when needed. Clean ducts plus tight seals improve IAQ and system efficiency together. > "We got our ducts cleaned out on Monday and then our air was not working correctly after... Chase came out Tuesday evening... and was able to fix the problem!" ## Pair Sealing With Duct Cleaning and IAQ Upgrades Sealing stops the inflow of unfiltered air. Cleaning removes the debris already inside. Together they deliver better comfort and cleaner breathing. What we recommend: - Truck-powered duct cleaning for deep debris removal in long trunk lines. - MERV-rated filters sized for your system to keep pressure in range. - IAQ add-ons, from air cleaners and purifiers to ventilators and humidifiers. - Coil and blower cleaning if return leaks have carried dirt to the equipment. Two hard facts to guide your plan: - DOE research shows duct leakage can add 20 to 30 percent to heating and cooling usage. Sealing cuts that waste. - The 2018 International Energy Conservation Code requires duct leakage testing for new homes when ducts are outside the conditioned space, with defined leakage limits. That keeps comfort and efficiency on track from day one. ## DIY or Pro? Safety, Materials, and Results Some sealing tasks near the furnace are DIY friendly. Others need pro tools and testing. DIY candidates: - Sealing visible metal seams in the basement with UL 181 foil tape. - Brushing mastic on takeoffs you can easily reach. - Replacing old register boots and adding trim seals. Call a pro for: - Insulation, asbestos, or mold concerns. - Damaged, undersized, or unbalanced duct systems. - Aerosol-injected sealing and before-and-after leakage testing. Why homeowners choose us: - We wear shoe protectors, protect wall corners, and take all of the dirt with us. - Flat-rate pricing, 24/7 emergency service with no extra after-hours fee, and a 100% satisfaction guarantee. - Trane Comfort Specialist training and full-service capability for cleaning, sealing, repairs, and IAQ. ## What a Professional Duct Sealing Visit Looks Like Here is the typical flow when we seal ducts in Champaign, Urbana, or Mahomet. 1. Inspection and testing - Visual walkthrough of accessible runs, boots, and returns. - Optional duct leakage test to quantify the problem. 2. Preparation - Clean surfaces. Tighten connections. Replace failed flex or boots. - Set floor protection and corner guards. Wear shoe covers. 3. Sealing - Apply mastic on joints and irregular gaps. Use foil tape on straight seams. - Aerosol sealing if hidden leaks remain and access is limited. 4. QA and cleanup - Re-test leakage if applicable. Confirm airflow and room temps. - Vacuum dust, replace panels, and leave the workspace clean. Timeline and cost range: - Small sealing projects take 2 to 4 hours. Larger homes can take a day. - Minor ductwork repairs often run 100 to 400 dollars per line item, depending on scope. We confirm flat-rate pricing before work begins. ## Signs Your Ducts Need Sealing Now Look for these symptoms in your home or facility: - Uneven temperatures between rooms or floors. - Dust near registers or around return grilles. - Musty smells when the blower starts. - High utility bills despite regular maintenance. - AC runs long cycles in summer. Furnace short cycles in winter. Commercial facilities in Danville and Rantoul often see comfort complaints near exterior walls and open office areas. Sealing and balancing can stabilize those zones and reduce tenant calls. ## Maintenance Plans That Protect Your Investment Sealing is step one. Keeping your ducts clean and your system tuned is step two. With each service visit, our techs complete a detailed inspection and essential maintenance tasks. Commercial clients can enroll in proactive maintenance plans to extend equipment life and reduce operational costs. Join the Lanz Comfort Family to get exclusive perks and savings, priority service, and scheduled HVAC maintenance. Members get peace of mind as seasons change across Central Illinois. ### What Homeowners Are Saying > "The crew that came to clean our ducts were very professional and diligent to be sure they cleaned every vent and both furnaces... Our house smells so much cleaner and feels warmer." > –Lanz Customer, Champaign > "The installers, Chris and Dan were on time, efficient, and did a great job with ductwork changes and installing the new system... We very much appreciated their attention to detail and feel they did the job right!" > –Lanz Customer, Urbana > "Will did a great job replacing the clogged duct on our dryer and replacing the outside hood... We were very pleased with the job that was done." > –Lanz Customer, Mahomet ## Frequently Asked Questions ### How do I know which duct sealing method is best for my home? We start with an inspection. If leaks are visible and accessible, mastic and UL 181 foil tape work well. Hidden leaks in finished spaces often benefit from aerosol-injected sealing after basic repairs. ### Will sealing my ducts really lower my energy bills? Yes. DOE studies show 20 to 30 percent of conditioned air can be lost to duct leaks. Sealing reduces waste, improves comfort, and can shorten system runtime, which lowers bills. ### Should ducts be cleaned before or after sealing? If ducts are visibly dirty or return leaks were pulling dust into the system, clean first. Sealing then keeps new debris out. We can combine services to fit your schedule. ### Can I use regular duct tape to seal seams? No. Cloth duct tape dries out and fails. Use UL 181-rated foil tape on clean metal seams or mastic sealant on joints and irregular gaps for a lasting seal. ### How long does professional duct sealing take? Small homes take a few hours. Larger homes or projects with aerosol sealing can take most of a day. We provide flat-rate pricing and a clear timeline before work begins. ## In Summary Sealing the leaks in your ductwork restores comfort, cuts energy waste, and reduces dust. The three primary duct sealing methods are mastic, UL 181 foil tape, and aerosol-injected sealing. For fast, proven results on duct sealing methods in Champaign-Urbana, schedule your inspection today. ## Ready to Stop Air Leaks? Let's Seal It Right. Call Lanz Plumbing, Heating & Cooling, Inc. at 217-247-4108 or visit https://lanzinc.com/ to schedule duct sealing, cleaning, or repairs. Ask about Lanz Comfort Family membership for priority service and savings. Founded in Champaign and trusted across Central Illinois, Lanz Plumbing, Heating & Cooling, Inc. delivers HVAC, plumbing, and IAQ expertise with flat-rate pricing and 24/7 service. We are a Trane Comfort Specialist, BBB recognized, and back our work with a 100% satisfaction guarantee. Join the Lanz Comfort Family for priority service and preventive savings.

Danville, IL Duct Services: Air Duct Replacement Costs

*Estimated Read Time: 11 minutes* If you are pricing an air duct replacement for your home, you want clear numbers and zero surprises. This guide explains air duct replacement cost drivers, realistic per-foot pricing, and how to budget for permits, insulation, and balancing. We will show you when a simple repair is smarter than a full replacement and how quality installation lowers energy bills. Live in Champaign, Urbana, or nearby? Our local team can provide a firm quote today. ## Average Air Duct Replacement Cost in Our Area Homeowners in the Champaign-Urbana area typically spend between $3,000 and $8,500 for full ductwork replacement in a single-family home. Smaller homes or partial replacements can fall near $1,800 to $3,000. Larger homes, complex layouts, or tight crawl spaces can reach $9,000 to $15,000. What drives that range: 1. Home size and total duct length 2. Duct type - sheet metal, flex, or duct board 3. Location - attic, crawl space, basement, or slab 4. Accessibility and code upgrades - insulation, sealing, supports 5. Add-ons - new registers, zoning, IAQ, balancing, and testing Tip: A professional replacement should include design review, sealed joints, proper insulation in unconditioned spaces, and airflow balancing. These steps protect comfort and energy costs for years. > "They cleaned out air ducts quickly and thoroughly. Nice people, good work!" ## Cost Per Linear Foot - Materials and Installed Pricing Thinking in per-foot terms helps set a budget. Typical ranges in Central Illinois: - Flex duct installed: $18 to $35 per linear foot - Sheet metal installed: $25 to $55 per linear foot - Duct board installed: $22 to $45 per linear foot What is included in installed pricing: 1. Material - duct, takeoffs, elbows, boots 2. Labor - removal of old ducts and proper installation 3. Sealing - mastic or UL-listed tape at seams and joints 4. Supports and strapping - per code and manufacturer guidelines 5. Insulation - where ducts run in unconditioned spaces Local insight: Older homes around Champaign often have long trunk-and-branch sheet metal runs in basements. Converting some branches to insulated flex, with a sealed metal trunk and proper boots, can reduce labor and noise without sacrificing durability. > "Do not get your ducts cleaned from an ad on Facebook, Lanz give you up front pricing and no hidden fees." ## Whole-House Estimates by Home Size These ballpark totals assume average accessibility and a mixed metal-flex design with sealing, insulation where required, and final balancing. - Small home or townhome 1,200 to 1,600 sq ft: $2,800 to $5,000 - Mid-size home 1,700 to 2,400 sq ft: $4,000 to $8,500 - Large home 2,500 to 3,500 sq ft: $6,500 to $12,000+ Budget tips: 1. Replace damaged sections and rebalance if the trunk is sound. 2. Combine duct replacement with equipment changeout to save on labor overlap. 3. Ask for a line-by-line scope that lists sealing, insulation R-values, and new register counts. > "We were cautious about having our ducts cleaned... Our house smells so much cleaner and feels warmer. Very reliable and trustworthy." ## Attic vs Crawl Space vs Basement - Access Matters Labor time rises in tight or hot locations, which affects price. - Attic runs: Heat in summer and blown-in insulation increase labor. Expect 10 to 20 percent more than basement work. - Crawl space: Shallow or damp crawls mean slower progress. Add 10 to 25 percent for tight conditions or moisture mitigation. - Basement or open joists: Easiest access and lowest labor. Often the most cost-effective location for main trunks. Moisture, mold, or rodent contamination must be resolved before replacement. Sealing, proper supports, and insulation keep ducts dry and clean over time. > "Will did a great job replacing the clogged duct on our dryer and replacing the outside hood... We were very pleased with the job that was done." ## Material Choices - Pros, Cons, and Cost Impact 1. Sheet metal - Cost: higher material and labor - Pros: durable, easy to clean, low friction - Cons: heavier, needs careful sealing and insulation in unconditioned areas 2. Insulated flex duct - Cost: lowest material cost - Pros: fast install, good for branches, quiet - Cons: must be pulled tight and supported correctly or airflow drops 3. Duct board - Cost: mid-range - Pros: built-in insulation, quieter - Cons: not ideal in damp spaces, harder to clean than metal Performance rule: Poor installation negates material advantages. Sagging flex, unsealed seams, or crushed elbows can wipe out efficiency and comfort. > "Even had someone else did ducts a year ago, Lanz Duct cleaning did it right way. They cleaned all the vents not just blowing out with an air wand." ## Replacement vs Repair - When a Targeted Fix Wins You might not need full replacement. Common repair scenarios with typical local pricing: - Ductwork repair for leaks or reattachment: $100 to $400 per section - Boot or register replacement: $100 to $250 each - Adding a new return for better airflow: $300 to $700 depending on run and access - Sealing and balancing service: $450 to $1,200 for a typical home Choose repair when: 1. Metal trunks are solid and only branches leak. 2. Comfort issues trace to missing returns, not failed ducts. 3. Airflow improves with sealing and balancing alone. > "Had my ducts cleaned and air conditioner fixed recently, and both services went off without a hitch." ## Code, Permits, and Insulation in Illinois Illinois follows the Illinois Energy Conservation Code based on the 2021 IECC. In practice this means: - Supply ducts in unconditioned spaces typically require R-8 insulation. Returns often require R-6. - Ducts must be sealed with mastic or UL-listed tape. Foil tape alone is not enough at critical seams. - In many municipalities, a mechanical permit is required for duct replacement. Expect inspection of supports, sealing, and insulation. Local insight: Many Champaign County homes route supplies through vented attics. Upgrading to R-8 insulation and airtight boots often delivers noticeable comfort gains and lower bills. ## Design That Protects Your Equipment and Wallet A proper design prevents hot and cold spots and protects your blower motor. Key steps we take on replacements: 1. Load and duct sizing review to match your equipment 2. Static pressure target with right trunk sizes and smooth fittings 3. Returns balanced per room count and door undercuts 4. Sealed ducts with mastic at every seam and joint 5. Correct supports and straight flex pulls to reduce friction 6. Airflow balancing at the end, with temperature and pressure checks Result: Quieter operation, better comfort, and fewer callbacks. Lower static pressure extends equipment life and can cut run time. > "They came in 45 minutes after calling. Thank you Lanz!" ## Add-Ons That Influence Price - New registers and grilles: aesthetic upgrade that can improve throw and noise - Zoning: motorized dampers and a zone panel to customize temperatures across floors - IAQ solutions: whole-home air cleaners, purifiers, ventilators, and humidifiers - Dryer vent repair or reroute: improves safety and drying time These add-ons are optional but often cost-effective during a duct project since your system is open and accessible. ## Red Flags and How to Avoid Costly Mistakes 1. Vague scopes - insist on a written layout, material list, and insulation R-values. 2. No balancing - your quote should include final airflow tuning. 3. Sagging flex - demand proper strapping and straight pulls. 4. Tape-only sealing - require mastic at all joints and boots. 5. No permit where required - ask your contractor to handle it. Quality control checklist at completion: - All seams sealed, no visible gaps - Flex pulled tight with no kinks - Supports every 4 feet on flex and per code on metal - Boots sealed to drywall or floor to stop dust infiltration - Temperatures and pressures recorded for your records ## How Long Does Duct Replacement Take - Small homes or partial runs: 1 to 2 days - Mid-size full replacements: 2 to 4 days - Large or complex systems: 4 to 7 days Factors that extend timelines include tight access, attic heat, add-on zoning, and unforeseen issues behind finishes. ## Financing, Guarantees, and Membership Perks We offer flat-rate pricing and a 100% satisfaction guarantee. Our team runs 24-7 with no extra after-hours fee for emergencies. Ask about financing options to spread project costs. Consider joining the Lanz Comfort Family for scheduled HVAC maintenance and exclusive savings that help protect your new ducts and equipment. ## Quick Cost Calculator Example 1. 180 linear feet mixed metal-flex at an average of $28 per foot installed: $5,040 2. Add R-8 insulation upgrade in attic sections: $320 3. Two new returns for airflow balance at $450 each: $900 4. Permit and inspection fees: $150 Estimated total: $6,410 for a mid-size home with attic runs. Your layout and access will drive the final number. A free in-home assessment gives you a precise price. ## When Replacement Pairs Well With Other Work - Equipment changeout: align duct sizes with new blower and coil - Attic air sealing: cut heat gain that impacts supply temps - Crawl space encapsulation: protect ducts from moisture and pests - IAQ upgrades: install high-MERV filtration or a whole-home purifier at the same visit Doing these together reduces duplicate labor and speeds comfort improvements. ## Frequently Asked Questions ### How much does it cost to replace ductwork in a typical 2,000 sq ft home? Most homes around 2,000 sq ft land between $4,000 and $8,500 depending on access, material choice, insulation needs, and final balancing. ### Is sheet metal worth the extra cost over flex duct? Yes when durability, cleanliness, and long runs matter. Many homes use a sealed metal trunk with insulated flex branches to balance cost and performance. ### Do I need a permit to replace ductwork in Champaign-Urbana? Often yes. Many municipalities require a mechanical permit and inspection for duct replacement. We handle permits and schedule inspections for you. ### Will new ducts lower my energy bills? They can. Airtight ducts with proper insulation and balancing reduce leakage and blower run time, which often lowers utility costs and improves comfort. ### How long will a new duct system last? Well installed sheet metal can last 30 years or more. Flex branches typically last 15 to 25 years when properly supported and kept dry and clean. ## Conclusion Air duct replacement cost depends on length, material, access, and code requirements. A well designed and sealed system improves comfort and reduces energy waste. For a precise price on air duct replacement cost in Champaign and nearby cities, book a free in-home evaluation. We will show you options and a clear line-item quote. ## Ready for a Firm, Line-Item Quote? Call Lanz Plumbing, Heating & Cooling at 217-247-4108 or schedule at https://lanzinc.com/. Ask about financing and our Lanz Comfort Family membership. 24-7 service with no extra after-hours fee and a 100% satisfaction guarantee. Serving Champaign, Urbana, Danville, Rantoul, Mahomet, Savoy, and more. ## About Lanz Plumbing, Heating & Cooling, Inc. Family owned and trusted in Champaign and surrounding communities, Lanz delivers HVAC and plumbing with honesty and excellence. We are a Trane Comfort Specialist, BBB accredited, and back every job with a 100% satisfaction guarantee and flat-rate pricing. Our team provides 24-7 emergency service with no extra after-hours fee. Join the Lanz Comfort Family for priority scheduling and maintenance perks across HVAC and plumbing. We design it right, install it right, and maintain it right.

Duct Services in Greater Champaign Area | Lanz Plumbing, Heating & Cooling, Inc.

Name: Lanz Plumbing, Heating & Cooling, Inc.
Address: 2709 W Clark Rd, Champaign IL 61822, Champaign, Illinois, 61822, US
Telephone: https://lanzinc.com/

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Experience top-notch HVAC solutions with Lanz Plumbing, Heating & Cooling, Inc., where quality meets professionalism.

At Lanz Plumbing, Heating & Cooling, Inc., our skilled team ensures top-notch HVAC installation and repair with professionalism and precision.

Lanz Plumbing, Heating & Cooling, Inc. ensures quality HVAC installations that enhance indoor comfort and efficiency.

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Why Choose Us

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Trane Comfort Specialist and Mitsubishi Diamond Dealer

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4.9 rating from 2,906 reviews

Since 2002

Local, family-owned and operating since 2002

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Flat-rate pricing with no after-hours fee

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What Our Customers Say

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“Would highly recommend.”

5.0
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“They cleaned every vent and both furnaces. Our house smells so much cleaner and feels warmer.”

5.0
professionalism

“Will did a great job replacing the clogged duct on our dryer and replacing the outside hood.”

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Frequently Asked Questions

How much does air duct replacement cost for a typical home?

Air duct replacement cost for a typical home is confirmed after an on-site inspection because price varies by home size, duct material, layout, and how easy the ducts are to access. Most replacements happen when ducts are badly damaged, contaminated, or poorly sized, which hurts airflow and comfort. Minor sections can often be repaired; full replacement is the smarter choice when issues are widespread or the design is wrong. Our team regularly designs and replaces ductwork for homes around Champaign with a 100% satisfaction guarantee.

A professional duct replacement typically includes:

Room-by-room airflow and sizing review
New, properly sealed and insulated ducts
Register and damper balancing with post-work airflow check
Code-compliant hangers, supports, and transitions to equipment

To get a clear price, schedule a duct assessment that includes measurement, design options, and a written quote.

Updated: 2026-03-24

Need help in Champaign, IL? Call 217-247-4108 or book online.

How Can I Seal a Leaking Air Duct to Improve HVAC Efficiency?

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