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Seal Air Leaks and Improve Insulation to Lower HVAC Costs
Posted On: February 4, 2026
If your home feels drafty in winter or your heating system seems to run nonstop, air leaks and poor insulation may be the real problem—not your HVAC equipment.
Even the most efficient heating system can’t perform well if warm air is constantly escaping.
At Twintech Heating & Cooling, we regularly see homeowners overspending on energy simply because their home isn’t properly sealed or insulated.
Here’s how fixing these issues can dramatically improve comfort and lower HVAC costs.
Why Air Leaks Drive Up Heating Bills
Air leaks allow heated air to escape and cold air to enter, forcing your HVAC system to work harder than necessary.
Common problem areas include:
Windows and door frames
Attic hatches and pull-down stairs
Electrical outlets on exterior walls
Basement rim joists
Duct connections and penetrations
Even small gaps can add up to significant heat loss over time.
Signs Your Home Has Air Leaks
You may have air leakage issues if you notice:
Cold drafts near windows or doors
Uneven room temperatures
Rising heating bills without increased usage
Rooms that never seem to warm up
Excessive dust entering the home
These symptoms often point to air escaping faster than your HVAC system can replace it.
How Sealing Air Leaks Improves HVAC Performance
When air leaks are sealed:
Heated air stays inside longer
Your HVAC system cycles less frequently
Rooms heat more evenly
Energy efficiency improves immediately
This reduces wear on your equipment and can extend system lifespan.
Improve Insulation for Better Heat Retention
Insulation slows heat transfer and helps maintain consistent indoor temperatures.
Key areas to insulate:
Attics (one of the biggest sources of heat loss)
Exterior walls
Basements and crawl spaces
Ductwork in unconditioned spaces
Proper insulation keeps warm air inside during winter and outside during summer, easing the workload on your HVAC system year-round.
Insulation vs.
HVAC Upgrades: Which Comes First?
Many homeowners assume upgrading their furnace or heat pump is the best solution—but air sealing and insulation often deliver faster, more affordable results.
In some cases:
Sealing and insulating allows for smaller HVAC systems
Existing equipment performs noticeably better
Energy savings begin immediately
A home that holds heat efficiently makes any HVAC system more effective.
Professional Evaluation Makes the Difference
Not all air leaks and insulation problems are visible.
A professional assessment can identify:
Hidden leakage paths
Under-insulated areas
Duct losses affecting system performance
At Twintech Heating & Cooling, we look at the entire home as a system, not just the HVAC unit.
Long-Term Benefits of Sealing and Insulating
Homeowners who address air leaks and insulation often experience:
Lower monthly heating bills
Improved indoor comfort
Reduced HVAC run time
Fewer hot and cold spots
Better overall energy efficiency
These improvements also increase home value and comfort year-round.
Get Expert HVAC Guidance This Winter
If your heating system seems to struggle despite regular maintenance, air leaks or insulation may be the missing piece.
Twintech Heating & Cooling helps homeowners identify efficiency issues and improve HVAC performance from the inside out.
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See What Our Customers Are Saying:
Jun 5, 2018
All interactions from sales to installation were Courteous and professional. The installation was seamless and the attention to detail including clean up was outstanding. I highly recommend TwinTech Heating and Cooling.
May 17, 2018
Twintech's Salesman Dave arrived promptly was friendly and courteous, listened and assured us the installation would be completed according to our requests. The crew arrived early morning on May 11th, 2018 and worked through till late afternoon non-stop. They were very friendly, very professional, their expertise was excellent, their workmanship outstanding and the installation was completed in a timely and efficient manner. We were completely satisfied and happy with the quality of the work.
May 9, 2018
I had cold and hot spots all over my 70 yr old home. My furnace is quite new and Greg optimized the fan and furnace. The original installer just took it out of the box with factory settings and installed it- basically running at 50% of capacity. Greg also routed heat into my laundry room, yeah - so now I can renovate laundry room - thanks Greg. He is honest, professional and knowledgeable. I will be calling him back in the spring to optimize my AC as well.
May 8, 2018
Wonderful from beginning to end. I tend to fret and worry about home improvements but the excellent team at TwinTech put my mind as ease. They listen, they are patient and best of all ... the work they did is amazing! I chose the Goodman 80K BTU 2 stage furnace and the matching Goodman air conditioner. Greg, Grant and Poitr "Peter" arrived on time, took great care, explained everything to me and they answered all of my questions. They carefully adjusted the factory settings to optimize the furnace for my house and they also checked the duct work in the basement. Dave, the Sales Manager, came by to say "hello" and to see if I was happy. YES, I am happy with the work! The furnace is very quiet. I have it running on low just to circulate the air in the house and it's so much quieter than my old furnace. When I need new duct work for an upcoming basement renovation TwinTech will be my first choice. I highly recommend TwinTech. PS. They were even nice to my dogs.
Apr 21, 2018
Greg was prompt on the scheduled day of installation and the work was done well within the time estimated beforehand. Installation was neat and the equipment and scope of work was as specified in the quote. One item I must point out is that we were faced with a "No Heat" situation the day before the scheduled installation and Greg came out to address it free of charge. Not only that, but he also corrected an installation fault with our smart thermostat that was not part of the original job, again free of charge.
Mar 16, 2018
Greg came by to do a routine furnace checkup. He was very knowledgeable and professional, letting me know what's being checked/adjusted and giving me tips to ensure everything runs smooth. Very honest and upfront about what's working fine vs. what may need to be fixed/replaced. He didn't attempt to up sell anything that wasn't necessary. I'm glad to have finally found someone I can trust and rely on for all my HVAC needs - furnace, A/C, and hot water tank.
Mar 4, 2018
I'm very happy with the work that was done. Everyone from salesperson to the installers were friendly and professional. They were on time and cleaned up the job site after it was installed. They also answered all my follow up questions promptly. I wouldn't hesitate to work with them or recommend them again.
Feb 28, 2018
Thanks to the team at Twin Tech for a great job installing my new heat pump/ac unit. The guys were very polite and professional. When they left you would never have known they had been there except for the new Mitsubishi unit on the wall!! would highly recommend the Twin Tech team.
Feb 28, 2018
Installed professionally, no delays, no rework needed. Very reliable contractor and sales person. Also installed BBQ gas line and some duct work.
Feb 19, 2018
Greg and Grant are friendly, reliable, and knowledgeable HVAC professionals. The twins, Dave and the entire team provided efficient top quality service. Our family plns to use Twintech for all of our future HVAC needs.
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