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Uneven Heating in Winter - Causes and Fixes

Is one room in your house freezing while another feels perfectly warm? Uneven heating is a common winter complaint—and it’s usually a sign that something in your HVAC system or home setup isn’t working as it should.
At Twintech Heating & Cooling, we help homeowners track down the root cause of uneven heating and fix it for good.
Here’s what causes uneven heating in winter and how to solve it.
Common Causes of Uneven Heating
Uneven temperatures aren’t random.
They typically point to airflow, system design, or home efficiency issues.
Poor Airflow or Blocked Vents
If warm air can’t move freely, some rooms won’t receive enough heat.
Check for:
Furniture or rugs blocking supply vents
Closed or partially closed vents
Obstructed return air grilles
Even small airflow restrictions can cause big temperature differences.
Dirty Air Filters
A clogged filter reduces airflow throughout the system, making it harder to heat distant rooms.
Fix: Replace filters every 30–60 days during winter.
Leaky or Unbalanced Ductwork
Duct leaks allow heated air to escape before it reaches your living spaces.
Poorly balanced ducts can also send too much heat to some rooms and not enough to others.
Signs include:
Rooms far from the furnace staying cold
Temperature differences between floors
Higher heating bills
Professional duct sealing and balancing can restore even airflow.
Inadequate Insulation or Air Leaks
Rooms with poor insulation or drafts lose heat faster than your HVAC system can replace it.
Common trouble spots:
Attics and exterior walls
Windows and doors
Basements and bonus rooms
Sealing air leaks and improving insulation often solves uneven heating issues.
Single Thermostat for Multiple Floors
Heat rises, which means upstairs rooms often feel warmer than downstairs spaces.
A single thermostat can’t accurately regulate multiple zones with different heating needs.
Solutions may include:
Zoning systems
Smart thermostats with sensors
Duct adjustments to balance airflow HVAC System Size or Design Issues
If your system is improperly sized or outdated, it may struggle to distribute heat evenly.
Undersized systems:
Run constantly
Fail to maintain consistent temperatures
Oversized systems:
Heat unevenly
Short cycle and reduce comfort
A professional load calculation ensures the system matches your home’s needs.
Fixes That Actually Work
Depending on the cause, effective solutions include:
Replacing air filters regularly
Sealing and insulating ductwork
Improving home insulation
Adjusting or rebalancing vents
Installing zoning or smart thermostat solutions
Upgrading aging HVAC equipment
Temporary fixes rarely solve the root issue—targeted solutions do.
When to Call a Professional
If uneven heating persists after basic checks, it’s time for an expert evaluation.
A professional HVAC technician can:
Measure airflow and temperature differences
Inspect ducts and insulation
Identify system design problems
Recommend long-term solutions
At Twintech Heating & Cooling, we don’t guess—we diagnose.
Restore Comfort This Winter
Uneven heating doesn’t have to be something you live with every winter.
With the right adjustments and expert guidance, your home can feel comfortable in every room.
Once again Twin Tech came through and fixed my furnace. A young man by the name of Mitch came by tonight and he was so nice explained everything he was quick he was clean he turned off the lights even when he left the furnace room its just above and beyond Twin Tech always delivers and I just found out about them last year and I will use no one else but thanks again Mitch you are fantastic
I had a problem with the Furnace (Armstrong ultra V) and Greg diagnosed it on the phone. Even told me what the issue was and I was able to fix it. This level of service from a Business that is almost unknown today.
If you require service, reach out to Greg. I will definitely use them in the future!
We have been shopping for a heat pump for our home. We had 3 reps come in and make recommendations and provide a quote. Of the 3, Bob was so clearly so much more qualified, thorough and informed than the other two that the decision was a no brainer. As soon as we get our audit results Twintech will be installing our heat pump.
knowledgeable sales person, did not try to up-sell unneeded features,
and was easily contacted to ensure customer satisfaction.
Installation was expertly done by friendly guys, everything explained for use of the products. Old products were removed and returned to rental company as part of the service. Follow up call was received to check all was well. This is my second time using this company as I was fully satisfied with my previous air conditioning unit installation
Twintech recently installed a new furnace for me. Bob did a great job assessing what I had and needed. All details well explained including the importance of proper sizing of furnace and the value of multi stage heating and the variable speed blower. As a nurse, indoor air quality is a high priority so the variable speed motor running continuous is so good. 24/7 air cleaning. Greg did a great job on install, attention to detail so appreciated. Already notice such an improved comfort and heat. Thank you Twintech! You come as advertised. I will recommend to anyone in need of heating or cooling!
We received various quotes from 4 different companies and right away, the prompt and thorough communication from Bob from TwinTech stood out. He introduced himself, sent sample sites and information, and always confirmed any agreed to dates and times.
Bob was friendly and extremely knowledgeable about the topic of HVAC and it was clear he was passionate about his profession. He approached the job as if he was installing in his own home.
Prior to the new furnace & A/C installation, our old units were loud and inefficient - having several rooms feeling too cold in the winter and too hot in the summer. After installing the recommended units, all rooms stay at a consistent temperature- even the finished basement.
I highly recommend the TwinTech team - just an outstanding job at a reasonable price point.
The experience with Twintech was great from the start. Bob the sales manager was friendly and professional and did not use any pressure tactics. He was very knowledgeable.
The installation was completed by the twin owners in about 6-7 hours. Clean quiet easy going didn't mind when I poked my head in to see progress. Highly recommend
Just choose Twintech!
I do not usually write reviews and should have done this a few days sooner. But I was and still am enjoying the increased comfort in my home from the new furnace installed by Twintech.
From my initial call and conversation with Bob, I already had a good feeling that I would like this company.
I was provided information, pictures of great quality work previously completed.
When Bob came for the inspection of the furnace he was amazing. He gave so much great advice and told me all the areas that his team would resolve. I was very impressed as some of what he had suggested I had only seen in Youtube videos. The honesty and options for payment made this a no brainer. I decided I would like Twintech to replace my furnace.
The work was scheduled promptly week and took place within half a day. Gregg came to install the new furnace. Again amazing they carried out all the work promised. What was left was the best I have seen and speaks to how they take pride in the work they do and deliver. Gregg was really polite and professional and the furnace in my basement is a work of art.
They were friendly, fast, clean, & answered any questions I had. They are also offering an interest free 12 month payment plan - that really helped me out since this was an unexpected expense.
I had Twintech heating install a new furnace and ac unit. Bob, the sales rep, the installation team of Greg and Mitch were a 10 across the board. They were never pushy, gave me time to think about it. Once we decided , they were there in 24hrs. Great company to deal with. And they were nearly 5k less than a competitors quote for a top of the line furnace/ac unit verse mid level.
I highly recommend Twintech heating to anyone interested in anything HVAC.
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We are very happy to recommend this company to everyone. Our furnace broke down on Sunday morning. We phoned them and before noon Grant the owner showed up. He worked on the furnace for about a hour not wanting to give up to fix the problem. The furnace was 17 years old. I was the one talking about replacing it. End result was the next day it was all done. On the Sunday Bob came over with heaters to warm up the house. We decided to replace the water heater at the same time. Thanks Grant for the excellent work. Thumbs up.
Right on time. Explained how to work the HRV in a different way so the house would not be so dry. Changed my whole house water filter for me as well. Friendly, helpful, caring service!
Very pleased with the professional service that TwinTech Heating and Cooling provided in replacing my furnace. I got several quotes from different service providers. Their price was excellent and they explained the features very well. We are very glad we went with TwinTech and highly recommend their services.
We were new homeowners in need of a second opinion. TwinTech Heating & Cooling were Amazing and professional. Very knowledgeable and great service all around. Recommend to anyone looking for honest and reliable services. Treated with respect and care. Thank you Greg, Mitch and Bob!
TwinTech is an excellent and honest company! I called them for a second opinion after being told by another company that I needed to replace my furnace. Turns out this was not the case at all! I did not need a new furnace. TwinTech did not push to make an unnecessary sale and saved me from a huge expense. Bob and Mitch were extremely professional and above all honest! I definitely recommend TwinTech!
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