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Why Are Some Rooms Colder Than Others in My Colliers, WV Home?

July 12th, 2026

3 min read

By Scott Merritt

Why Are Some Rooms Colder in My Colliers Home?
5:13

Quick Answer

Some rooms run colder because heat does not reach them evenly: weak vents, leaky or undersized ducts, poor insulation, or distance from the furnace. In a Colliers home, a bonus room over the garage is the usual cold spot.

Many Colliers homes are larger or have additions and bonus rooms, often over a garage. Those rooms sit at the edge of the duct layout and lose heat through several exterior surfaces, so they run cold.

A room over an unheated garage is cold from below as well. Insulating it helps, but giving it its own heat is often the cleanest way to keep it comfortable.

After 30-plus years in homes across Ohio, what we see in Colliers is a bonus room over the garage running cold, sitting outside the main duct layout and losing heat on several sides.

What Causes Cold Rooms in the First Place?

Quick Answer:

Usually airflow and insulation. Heat reaches each room through your ducts and vents, so weak or leaky ducts, blocked vents, a missing return, or thin insulation all leave that room colder than the rest of your house.

  • A closed, blocked, or furniture-covered supply vent
  • Leaky or undersized ducts losing heat on the way
  • No return vent, so warm air cannot circulate
  • Long duct runs to rooms far from the furnace
  • Thin insulation in walls, floors, or above the room
  • A room over a garage or in an addition

Often it is a mix: a far room with a long duct run and weak insulation feels it most. The good news is that most causes are fixable without touching your furnace itself.

Why Is This Common in My Colliers Home?

Quick Answer:

Because many Colliers homes have bonus rooms or additions, often over a garage, those rooms sit at the edge of the duct layout and lose heat on several sides. So they stay colder than the main house.

Sealing and extending the ducts can help, but a room over a garage loses heat from below too. Insulating the floor and walls holds more, and a single ductless head usually gives that room reliable, controllable heat.

How Do I Fix Cold Rooms?

Quick Answer:

Start easy: open and clear every vent, then check for a return in your cold room. Next, have the ducts checked for leaks and your airflow balanced. Add insulation where it is thin, and consider zoning for your stubborn rooms.

In Colliers, insulate a bonus room well, including the floor over a garage, and balance whatever ducts reach it. For a room the ductwork cannot properly serve, a ductless head is usually the cleanest lasting fix.

Do I Need a New System to Fix It?

Quick Answer:

Usually not. Balancing airflow, sealing ducts, and adding insulation fix most cold rooms in your home. For a room your ducts just cannot reach well, like an addition or bonus room, a single ductless head gives it its own control.

That is far cheaper than replacing a system that heats the rest of your house fine. The point is to fix the room, not oversell your house, so the right answer is usually the smallest one that works.

Key Point: In Colliers, bonus rooms and rooms over garages sit at the edge of the duct layout and lose heat on several sides, so insulation plus a ductless head usually fixes them.

Cold-Room Causes at a Glance

Cold-room cause

What helps

Closed or blocked vent

Open and clear it; check for a return

Leaky or undersized ducts

Seal and balance the airflow

Thin insulation

Add insulation to walls or above

Room ducts cannot reach

A single ductless head for zone control

Colliers focus

Bonus room over garage; insulate, add a ductless head

Honest Fix finds the real cause in your home: we check vents, returns, ducts, and insulation, then balance the airflow. If a room needs its own ductless head we will say so, and if not, we will say that too.

Frequently Asked Questions

Should I close vents in unused rooms to push heat elsewhere?

Usually no. Closing vents raises pressure in the ducts, which can cause leaks and make your furnace work harder, often making other rooms worse, not better. Leave your vents open and fix the real airflow problem instead.

Will a bigger furnace fix my cold rooms?

Rarely. If the heat is not reaching the room, a bigger furnace just makes more heat that still cannot get there, and can short-cycle. Fixing your ducts, returns, and insulation solves the problem a bigger unit will not.

Why is the room over my Colliers garage always cold?

It sits at the edge of the duct layout and loses heat through the walls, roof, and the floor over an unheated garage. Insulating those surfaces helps, and a single ductless head usually gives it steady, controllable heat.

Is a ductless head worth it for one cold room in Colliers?

Often, yes. For a bonus room or addition the ducts cannot properly reach, a single head heats and cools it directly, with its own control, for far less than reworking the whole system. We will tell you if a simpler fix exists.

Even Out the Cold Rooms in Your Colliers Home

Tired of one freezing room? Call (740) 825-9408 and we will check the vents, ducts, returns, and insulation, balance the airflow, and tell you honestly what your Colliers room needs.

Scott Merritt

Scott Merritt is a co-founder of Honest Fix Heating, Cooling and Plumbing and brings more than 30 years of experience across HVAC, leadership, and industry education. He serves in a senior leadership and oversight role, providing licensed guidance, reviewing HVAC educational content, and supporting technician training and documentation standards. Prior to co-founding Honest Fix, Scott founded and owned Fire & Ice Heating & Air Conditioning in Columbus, Ohio, which he operated for more than two decades before selling the company in 2025. During that time, he led programs and partnerships including Carrier Factory Authorized Dealer, Trane Comfort Specialist, and Rheem Pro Partner, helping establish high technical and training standards. Scott is the Ohio State HVAC license holder for Honest Fix and provides licensed oversight to help ensure work meets applicable codes and manufacturer requirements. Learn more about Scott’s background and role at Honest Fix by viewing his full leadership bio.