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Why Is One Room In My Phoenix House Hotter Than The Rest?

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Hot Room Causes & Solutions

It’s really getting hot out there! It’s time to get ready for the heat that always comes to Arizona in the summer. And while you may have an air conditioning system that works well and keeps your house cool, you may also have a room that just never feels as comfortable as the others. These rooms that don’t seem to ever quite get cool enough are commonly referred to as hot rooms. 

There are a number of reasons why certain rooms do not cool adequately. There are also a lot of options for homeowners when it comes to getting that hot room cool again! With the help of the comfort experts at Hobaica, we’ll help you determine why there is one room in your home that is hotter than the rest and what you can do about it. 

Reasons Why You Have A Hot Room

Air Vent Issues

One of the most common reasons for an uneven temperature in a home is air vent issues. If conditioned air is not able to flow freely through the vents, it can cause the room to feel hot and stuffy. 

In some cases, the issue may be with the ductwork itself. If there are leaks or blockages in the ducts, conditioned air can escape, causing the room to feel hotter than it should. Another possibility is that the vents are not properly sized for the room. If the vents are too small, they may not be able to circulate enough air to keep the room comfortable. 

Some air vent issues can be resolved by simply rearranging your furniture to ensure no vents are blocked. In other cases you may find your vents are partially or fully closed, and opening them up will make that hot room cool again. However, deeper problems with your ventilation system will require professional help. A licensed HVAC technician will be able to assess the situation and recommend the best course of action.

Insulation Issues

Many times, a hot room in your Phoenix area home is caused by insulation issues. Uneven temperatures in your home can be due to hot spots where there is less insulation or no insulation at all. This allows heat to leak into the room from outside, making it warmer than the rest of the house. 

If you have hot spots in your home, it's important to address the issue as soon as possible by having a qualified professional inspect your insulation for proper coverage. Insulation issues can lead to higher energy bills and make your home uncomfortable to live in. By taking care of the insulation problem now, you can avoid these potential issues and keep your home comfortable all year long.

The Right Addition

If your home has ever had an addition built on, it may be the source of your hot rooms. Many times, homeowners will build an addition and not think to upgrade their HVAC system to accommodate the additional square footage. Because the HVAC system is no longer sized correctly for your home, it ends up working overtime to cool your home, resulting in high energy bills and hot rooms. If you suspect this is the case, have your HVAC company do a load calculation and recommend a properly sized HVAC system for your home.

In other cases, the new addition doesn’t get tied into the existing HVAC system correctly - or at all! In cases like these, the hot rooms have insufficient air vents to provide enough cool air. You can solve this problem by running new ducts and vents, or you may prefer to add a ductless mini split system to the addition for supplemental cooling.


A surprising source of overheated rooms in Phoenix are the windows in your home. Your windows can increase room temperatures in a number of ways. If you have an older home with original windows, they’re probably allowing air leakage. Older windows are generally single-paned and uninsulated, making them a source of greenhouse effect heating in your home. Upgrading to modern insulated windows can significantly increase your home comfort and decrease your energy bills.

If a window upgrade isn’t currently in your budget, here are a few simple and inexpensive things you can do to cool your rooms down:

  • Seal the edges around your windows with caulk to eliminate potential drafts.
  • Close your blinds and curtains when your room is in full sunlight. 
  • If any windows have cracks that could be causing a draft, get those panes fixed. Keep the cracks covered with tape until they can be repaired.

Don’t Suffer A Hot Room - Get Help From Hobaica!

Here at Hobaica, we want to help you keep your home comfortable all year long. That’s why we offer a free ducting & insulation inspection. We can identify any air leaks or insulation issues in your home and provide solutions that will make your living space more comfortable and energy-efficient. If you’re experiencing problems with hot rooms, contact us today for a free consultation. We look forward to helping you get the most out of your home!

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Check Out Our Reviews . . . From Neighbors Near You

Chase Coffield
Chase Coffield
18:58 03 Jul 22
July '22: Welp, of course the older AC goes out in the Phoenix summer on a long holiday weekend but Hobaica saved our holiday! Called the emergency line and they were able to get a technician (John M) on site within 2 hours. John was very helpful in explaining the situation and helping evaluate the options, very knowledgeable, informative, efficient, and of course top notch customer service.As I've used Hobaica twice in less than a year on two systems, I'll be relying on them in the future for electrical, plumbing, and HVAC needs.Nov '21: Of the 5 - 7 separate HVAC companies that came to give a quote, they were the only ones to provide more than one option based on the specific needs of the space and its use.My only criticism is regarding specifics of installation that I now have questions on, that should've been hammered out beforehand.
Elizabeth Silva
Elizabeth Silva
23:13 02 Jul 22
J. Miranda was so helpful and replied to our request right away! Called other places for emergency repair on our AC and they wouldn't be able to send someone for 3 days! Anyone who lives in AZ knows waiting that long is not an option especially during the summer! J. Miranda was friendly and took the time to explain what needed fixing. Will recommend! Thank you again!
Chad Van Haren
Chad Van Haren
20:04 02 Jul 22
Great experience receiving estimate. Quick scheduling of service. Knowledgeable service techs. Most importantly, they delivered peace of mind, which can't be purchased.
Harriet Moser
Harriet Moser
13:22 02 Jul 22
Great guys to work with. Knowledgable, efficient, professional.A follow up concern we had about our new unit was responded to quickly & well. Nothing wrong with the equipment, but it was retested and we were educated more about our new system by our tech.
Kitty Smith
Kitty Smith
11:56 02 Jul 22
Grayson Vu was a very knowledgeable and professional service tech. He was on time and took his time checking things out. He even recommended something to improve our air flow and comfort. Great company and great rep!
Karen Bender
Karen Bender
23:26 01 Jul 22
John and Jared came out today to take a look at my air conditioning unit. I live in a condo where I can’t see my unit but noticed some water dripping from the roof. They weren’t just on time, they were a little early which helped free up the rest of my day.They found that the system was running as it should be and let me know that the water was dripping because the condensation line was disconnected. Super easy fix with a little bit of glue, and they did not create worry where there was none just to add to the bill.As if that wasn’t good enough, they were incredibly nice and easy to talk to. Not nice because it’s required- just really genuine people. I was not expecting to have such an easy and inexpensive experience in Phoenix during hot, muggy monsoon season. Thank you both for making my day!
Jim Adams
Jim Adams
18:54 01 Jul 22
We recently had our air conditioning go out on Tuesday and on Friday a new unit was installed. The service has been fantastic. Could not have asked for a faster more friendly company.Zach and Gio were amazing in getting the unit installed and walking us through the new thermostat.
PHX Keeve
PHX Keeve
22:05 30 Jun 22
Grayson came out and was on time, and very nice. He took extra time to diagnose a potential problem, and even re-secured some wire mesh (to keep birds out) that had been blown off from the wind. He answered all my questions, will do business with hobaica again.
James Borsheim
James Borsheim
21:27 30 Jun 22
In every way possible, extremely professional service. Used since 2008, very pleased.

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