Do you have to vent all portable air conditioners out a window?

• <div><p>No. With a ventless portable AC system, you don’t need to vent anything out the window—but it will be harder to circulate the hot air from the room without one, so you’ll need to come up with another solution, like placing a fan near a warm spot and facing it towards and open water to push the hot air out.</p></div>

Top-rated heating and air conditioning pros.

Get matched with top heating and air conditioning pros in Mississippi State, MS

Enter your zip and get matched with up to 5 pros

TRUSTED BY MISSISSIPPI STATE, MS HOMEOWNERS

4.6
Average homeowner rating
32
Verified heating and air conditioning services reviews

Verified Reviews for Heating And Air Conditioning Service pros in Mississippi State, MS

*The Angi rating for Heating And Air Conditioning Service companies in Mississippi State, MS is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Mississippi State, MS is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

Last update on December 08, 2025

Reviewed in October 2025
Prompt estimate, fair price, met schedule, they even came out and fixed a funny noise months later. Best hvac service I’ve received in a half century. I’ve spent a career in facilities and construction—they are the absolute best.
AirTeK LLC
Request a quote
Reviewed in October 2023
I highly recommend working with Donovan. Not only does he do great work, he also is amazing to communicate with,and he always is able to get the job done quickly. He even came to help me one evening with barely any notice when I couldn’t get my water heater working. I have had an absolutely...
DC Electrical Services
Request a quote
Reviewed in December 2020
They did an outstanding job. No complaints. This is the 2nd hime I’ve lived in that ’ve had to utilize their services for new HVAC installation.
RW Heating, Air, Plumbing & Electrical Inc.
Request a quote
Reviewed in August 2020
After loosing electical power during a heat wave, my AC did not cool when the power was restored. When the power came back on the AC was blowing hot air. I called Guerrero's in the morning and they came the same day and repaired the unit. Very professional and adhered to COVID-19 protocol. I...
Guerrero's Heating & Air Conditioning
Request a quote
Reviewed in June 2016
Excellent service! Very professional. This is the second time Wayne has repaired my AC unit. Last year he replaced a switch or compressor on the unit. He came out within 24 hrs to get my unit up and running. Will definitely use him again.
ColemanAir, LLC
Request a quote
Reviewed in August 2013
Great crew, considerate and courteous. Here's an example: my wife and I came out into the backyard while they were working with a gas powered air compressor. One of the men propped a piece of plywood against the compressor to shield us from the noise. Little things like this make a...
Excellent Roofing LLC
Request a quote
Reviewed in April 2013
We have been their customer for about 13 years now. They do all of our heating, air, and plumbing services. We feel like they are very honest. If something ever goes wrong after a repair, they come out immediately to repair the issue.
Mitch Wright Plumbing Heating & Air
Request a quote
Reviewed in May 2012
I like them because every time I've called, they've come right away. Once they came out on Sunday night when my air conditioner was out. When I called them they came right away because I don't want to be hot. They are very good about coming right away. They are very friendly and I think they...
QUALITY HEATING & AIR & ELEC
Request a quote
Reviewed in June 2011
I now have a great old air-conditioned car. The car starts everytime. No more being stranded away from home.
BENNIE'S AUTO REPAIR
Request a quote
Reviewed in February 2011
Hard working young man who was working under adverse weather conditions. I paid in cash and he is so honest that in counting out the money, I overpaid and he returned the overpayment. Very pleased with the end results of the yard cleanup.
Brummett Lawn Service
Request a quote

Find Heating and air conditioning pros in Mississippi State

Sentri Homes

No reviews yet

Sentri Homes

No reviews yet

449 local quotes requested

Sentri Homes is a full-service contractor delivering high-end home additions, whole-home remodels, new custom builds, luxury kitchens, structural framing, roof replacements, and every major renovation. We assign a dedicated project manager to every job, deliver meticulous craftsmanship with clear communication, and back our work with an industry-leading warranty to ensure complete peace of mind on your largest investments. Our in-house team of licensed builders and master craftsmen consistently earns 5-star reviews by turning big visions into stunning, high-value homes—when you need one trusted partner who truly does it all, we’re the proven choice.

Fountain Heating and Cooling

No reviews yet

Fountain Heating and Cooling

No reviews yet

43 years of experience

Fountain Heating offers professional heating and air-conditioning services. We service existing units and do new construction for commercial and residential buildings. Our highly skilled technicians work on everything from heat pumps to central air units

Allen Brown Electrical, Heating, Air & Plumbing

No reviews yet

Allen Brown Electrical, Heating, Air & Plumbing

No reviews yet

Slogan: Half the price and twice as nice! Allen Brown Electrical, Heating, Air and Plumbing specializes in full air conditioning service in Southaven, MS and the surrounding area - Horn Lake MS, 38637 ; Lynchburg MS, 38680 ; Hernando MS, 38632 ; Olive Branch MS, 38654. We will guide and recommend the business services such as household general plumbing, electrical service,water heater repair services, air conditioning service and repair.

Triton Construction Company has 3 employees! We have a page on Facebook where are pictures of our jobs are it is under Triton Construction Company! We love helping people for a cheap and reasonable price. Thanks and have a great day!!!

Economy Heating & Cooling

No reviews yet

Economy Heating & Cooling

No reviews yet

Free onsite estimate

24 HR EMERGENCY SERVICE *Residential *Commercial *Remodeling or *New Construction *SALES-SERVICE-INSTALLATION *Sheet Metal Work... Fabrication, Custom-built duct work, Chimney Caps *YOU DESIGN IT-WE CAN MAKE IT*

Krell Distributing Co Inc

No reviews yet

Krell Distributing Co Inc

No reviews yet

53 years of experience

Additional DBA - Krell Industries. Family owned & operated. Nationwide service.

Second Nature (Formerly FilterEasy)

5.00(

)

Second Nature (Formerly FilterEasy)

5.00(

)

Customers say: Quick response

Recommended by 100% of Angi customers

Second Nature, formerly FilterEasy, empowers its members to achieve long-lasting, sustainable home wellness with convenient subscription plans, including high-quality home air filters and refrigerator water filters. We exist to simplify home wellness, to make it so easy and convenient that it becomes second nature. Learn about our products and subscribe at www.SecondNature.com/home.

Fornea's Heating & Cooling LLC

No reviews yet

Fornea's Heating & Cooling LLC

No reviews yet

29 years of experience

Fornea's Heating & Cooling LLC

Childers Mechanical

No reviews yet

Childers Mechanical

No reviews yet

10 years of experience

Call Childers Mechanical at (901) 609-8982 in Holly Springs, MS, for convenient HVAC repair and installation services at rates you can afford.

...

Showing 1-10 of 53

Heating and Air Conditioning questions, answered by experts

No. With a ventless portable AC system, you don’t need to vent anything out the window—but it will be harder to circulate the hot air from the room without one, so you’ll need to come up with another solution, like placing a fan near a warm spot and facing it towards and open water to push the hot air out.

The best way to reduce heat upstairs is to release it by opening a window. Hot air rises, and if you can create some airflow by opening a window upstairs and also one on a lower level, the hot air should be pushed out of the home. Remember that fans pointing out the window do a much better job of circulating air than fans pointing into the home.

Air filters with a high MERV rating, 11 or above, shouldn't cause airflow problems in most residential systems. However, the airflow can be restricted in some HVAC systems if they aren't designed for high MERV ratings. If in doubt, a local duct installer should inspect your ductwork so that you know what your system can handle.

A power outage can damage your air conditioner, just like a power surge can damage any electrical device or appliance. In most cases, your circuit breaker or built-in surge protection on your AC unit protects your AC and just needs a reset. But in other cases, it might be that your AC compressor or capacitor was blown during the power surge. You’ll need to have an HVAC professional repair or replace any AC parts.

It’s critical to use the right size AC for your space and not go too small or too big. If you purchase an undersized unit, it won’t properly cool your house, and it has to work harder to reach the optimal temperature. This will eventually wear your unit out. An oversized unit can spell trouble because it will turn off and on more frequently, which also wears out your AC unit. An oversized unit also causes humidity in the home.

The Mississippi State, MS homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.

See all articles

Lauren Bongard
•
Nov 21, 2025Nov 21, 2025
How Much Does HVAC Replacement Cost? [2026 Data]
HVAC replacement costs depend on a lot of factors, like unit type, size, and labor. See what you can expect to pay for HVAC replacement here.
Angi
•
Nov 21, 2025Nov 21, 2025
How Much Does Exposed Ductwork Cost to Install? [2026 Data]
Exposed ductwork can be a smart choice even beyond aesthetics. Fortunately, exposed ductwork costs are relatively low, and easy access keeps repair costs to a minimum.
Alison Kasch
•
Nov 20, 2025Nov 20, 2025
How Much Does a Blower Motor Replacement Cost? [2026 Data]
When your HVAC system is acting up, it could be the blower motor to blame. See how much blower motor replacement costs and what impacts the price here.
Sophie Yalkezian
•
Nov 10, 2025Nov 10, 2025
Who Do I Call to Fix My Boiler?
Who do you call to fix a boiler? This easy guide will help you hire the right pro for the job of fixing your boiler.
Veronica Sparks
•
Nov 20, 2025Nov 20, 2025
4 Different Ways to Clear a Clogged AC Drain Line (and How to Prevent One in the Future)
Do you have a clogged AC drain line? We dig into the reasons behind those pesky blockages and how to clear them for optimal AC performance.
Mizuki Hisaka
•
Nov 10, 2025Nov 10, 2025
When to Replace Your Boiler: Learn About These 7 Signs
Knowing when to replace your boiler will help you avoid last-minute emergencies in the middle of winter. Here are seven signs that you may need a brand-new unit.