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Mannix Heating & Cooling

Heating and Air Conditioning

About us

Mannix Heating and Cooling is a full service HVAC contractor with a location in Chantilly VA and Gaithersburg MD to serve you. We offer an extensive array of services designed to keep your heating and cooling equipment operating at peak efficiency through many years of reliable operation. We also provide water heater replacement, standby home generators and electrical panel replacements. For more information, please email info@mannixhvac.com

Business highlights

15 years of trusted experience
Emergency Services Offered

Services we offer

Heating & air conditioning - repair, replacement & installation, water heaters, humidifiers. Electrical - upgrades, generators. Service agreements

Services we don't offer

Window Units, New Construction HVAC Systems, Oil Furnace Repair

Amenities

Free Estimates
Yes
Warranties
Yes
Senior Discount

5%

Emergency Services
Yes


Accepted payment methods

Check
CreditCard
Financing Available

Photos of past projects

Reviews

4.9736 Reviews
Number of StarsImage of DistributionNumber of Ratings
5
92%
4
4%
3
1%
2
1%
1
1%


Rating CategoryRating out of 5
quality
4.9
value
4.7
professionalism
4.9
responsiveness
4.9
punctuality
4.9
Showing 226-250 of 736 reviews

Fred M.
02/2014
5.0
heating & air conditioning/hvac
  + -1 more
Our system is not the newest, but Mannix keeps it running just fine. In January, we noticed the humidity was low .. about 20%. Mannix came out within hours of my call and checked out (and fixed) the system. The only charge was the replacement element ($35)
Description of Work: I have a service contract with Mannix -- They visit twice a year (fall for the heater system and spring for the AC.

Rating CategoryRating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$35

Bob D.
02/2014
5.0
heating & air conditioning/hvac
  + -1 more
Excellent experience from beginning to end. Salesman/estimator was prompt, courteous, knowledgable, and quick to provide 3 written estimate options and to answer all follow-up questions. Estimates seemed fair and economical to us, and one year free Spring and Fall inspections was included in the price. Scheduled installation date fit my request and Installers were on time, professional, and efficient. They completed installation of all three appliances inside one day, and took extra time to explain how to operate the new thermostat that came with the HVAC system. Six months later, everything is working perfectly and we are fully satisfied with our purchase. Mannix even provided information to us quickly at tax time regarding how much of the purchase price was eligible for federal energy efficiency tax credits. Such a rare experience to find satisfactory service and appliances from a local company, the first time around. We will definitely plan to use Mannix again in the future.
Description of Work: Sale and installation of new residential (natural gas) furnace, air conditioner, and water heater in my 60-year-old home (to replace outdated and failing units).

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$7,300

Kenneth S.
02/2014
5.0
heating & air conditioning/hvac
  + -1 more
Mannix provided a fair price and delivered everything they promised, on schedule. No difficulties whatsoever. I even inadvertantly overpaid them and they called me right away before cashing my check -- very honest people. I requested quotes from three other firms. One never provided a quote, two others were nearly twice the price of Mannix. It pays to shop around. I have since used Mannix for other work at this same property and plan on using them my other homes (I'm a landlord) in the future. My tenants were very pleased with the service and professionalism of their staff. I highly recommend this company.
Description of Work: Replaced gas furnace, re-lined exhast (due to building code change), integrated HWH in exhaust.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$3,000

DON B.
02/2014
5.0
heating & air conditioning/hvac
  + -1 more
THE SERVICE WAS PERFORMED PERFECTLY AND THE AC WORKED GREAT ALL SUMMER.
Description of Work: WE HAVE A SERVICE CONTRACT ON OUR AC WITH MANNIX. THEY CAME OUT RIGHT WHEN THEY SAID THEY WOULD.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$88

Kathryn G.
02/2014
5.0
heating & air conditioning/hvac, water heater repair
  + 0 more
They are excellent. They came out and they were punctual and professional. They were very good with explaining the price because of the unit. They put down plastic so they wouldn't track dirt. They cleaned up after themselves, it was probably cleaner than when they arrived. They are absolutely fantastic. They can't come highly recommended enough. They were highly competitive and professional.
Description of Work: We use the services of Mannix Heating and Cooling. We had them install a brand new HVAC system. We had central air but they installed a new compressor/condenser and converted it also to heat pump. They just came to us this last month to do a check up on the system and also adjusted our water heater which they had nothing to do it.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Matt C.
02/2014
5.0
heating & air conditioning/hvac
  + -1 more
The heating system on my house was poorly installed originally, causing it to not function in the coldest weather. The technician was very friendly and professional. I felt that I could have gotten a slightly better price elsewhere, but I did feel better about the service than I'd gotten from other HVAC providers, so I guess you get what you pay for.
Description of Work: They came out on a Saturday and diagnosed the problem while performing a temporary fix, and then came back later in the week to perform a permanent fix.

Rating CategoryRating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$350

John M.
01/2014
5.0
heating & air conditioning/hvac
  + -1 more
Called Mannix and had a person at the house the next day, I told them not necessary to come that the day of the call. Quickly diagnosed the problem and got the unit working again. This was under warranty, no charge incurred, and everyone happy with the service.
Description of Work: Due to a power surge in the neighborhood, the air conditioning unit did what it was supposed to and shut off. Signal lights on the panel flashed red, signifying that technician was needed.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

David P.
01/2014
5.0
heating & air conditioning/hvac
  + -1 more
Very professional and very skilled. We use them for the service contract as well and are very pleased overall.
Description of Work: Replaced both of our HVAC units with high efficiency Carrier Infinity units.

Rating CategoryRating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$20,000

James T C.
01/2014
5.0
heating & air conditioning/hvac
  + -1 more
Mannix was incredibly responsive to our heating needs. Their servicemen was amazing. he diagnosed immediately and fixed the problem promptly. I intend to use them for everything HVAC-related in the future.
Description of Work: .

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Carissa B.
01/2014
5.0
heating & air conditioning/hvac
  + -1 more
Mannix is professional, prompt, courteous, and was able to install my new heat pump on a Saturday without it being an emergency. The crew was clean and cleaned up after themselves. I especially appreciate the extra effort they took to install the outdoor unit without removing the trellis screen around existing unit.
Description of Work: I used Mannix Heating and Cooling.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$9,300

HELENE M.
01/2014
5.0
heating & air conditioning/hvac
  + -1 more
I scheduled the appointment but was concerned that they couldn't tell me how soon they'd be able to arrive. My furnace was broken, and it was extremely cold outside (and increasingly cold inside). I didn't want to wait or take a chance that Mannix might not be able to fix the furnace today, so I looked further and found another highly rated company that could come within a couple of hours and gave me a specific 2-hour time window. The other company arrived, addressed the problem, and left after about an hour, and I had not yet received the 1/2-hour warning by that time. Obviously, I canceled the Mannix visit. The other company charged about $20 less that Mannix's diagnostic fee of $119.95.
Description of Work: This morning they scheduled an appointment to fix my furnace sometime today but could not provide any specific time in advance. They said they'd call 1/2 hour before coming.

Rating CategoryRating out of 5
professionalism
5.0
responsiveness
4.0

Yes, I recommend this pro

Response from Mannix Heating & Cooling
We are sorry we were unable to serve this member. During extreme weather conditions, the call volume we receive can often exceed our capacity. Since we don’t always know how long each service call will take, during these times we start a “Standby” list; A customer is informed when they call that they are on the standby list and are given a confirmed appointment for the next available day. If we find that the technicians move through their calls quickly, we start working on the standby list for that day. Our customers have told us there is nothing more frustrating then being told by a service company that they have an appointment and then a technician never makes it to their home due to heavy volume. We offer annual service plans that not only ensure that your system is ready for the extreme temperatures, but also moves you to the top of the list when emergency service is needed. We feel this procedure is the best way to handle heavy call volume during extreme weather conditions. Jerry Mannix

Brynn W.
01/2014
5.0
heating & air conditioning/hvac
  + -1 more
I have been using them ever since for my annual maintenance and upkeep of my system. I have recommended them a number of times to others who have all had similar experiences.
Description of Work: Jerry and his team replaced my heater/air conditioner a few years ago and did an outstanding job.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$10,000

Shane M.
01/2014
5.0
heating & air conditioning/hvac
  + -1 more
They called when they were on their way. I was told it would take 3 hours but they completed the work in about 2 hours. Cleaned up everything when they left.
Description of Work: Installed a steam humidifier (April Aire Model 800)

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$1,700

Sandra H.
01/2014
4.0
heating & air conditioning/hvac
  + -1 more
They didn't actually clean anything, they just looked at it. They cleaned a little bit outside but not inside...they barely opened it. They explained as well. They said they covered my area but if I wasn't on that deal then I will have to pay more for them to come back and do any work because they were far away. It was something I couldn't use and I will not pay an extra...I don't know what amount...he said he won't come out because their office is far away so they didn't covered my area. They didn't charge me that day for it but for other work I would have done.
Description of Work: I used the Big Deal and heating & A/C service of Mannix Heating and Cooling.

Rating CategoryRating out of 5
quality
4.0
value
5.0
professionalism
4.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$49

Response from Mannix Heating & Cooling
We were called to this members home for a "Big Deal" maintenance visit, our tech flushed the condensate drain, cleaned the condensate pump, checked the backup heat for proper operation and checked the refrigerant level of the heat pump. Our tech found the heat pump unit low on refrigerant as evidence of the pressure readings and the frosting up of the outdoor unit. We added two pounds of refrigerant and recommended that the system be checked again in the spring. After the refrigerant was added we had a supply air temperature reading of 128 degrees. According to our GPS program the tech arrived at 12:10 on 2/1/2013 and left at 1:30 pm. The member was charged $49 for the Big Deal and $110 for two lbs of refrigerant for a total cost of $159.00.

Janice E.
01/2014
5.0
heating & air conditioning/hvac
  + -1 more
they came as requested and serviced my new unit (purchase from them a year prior), approximate cost really forgotten
Description of Work: I signed up for an annual service (2x per year) contract,

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$86

Sheila B.
01/2014
5.0
heating & air conditioning/hvac
  + -1 more
We have had a maintenance contract with them for several years and I highly recommend them. Their pricing is competitive however their service is outstanding.
Description of Work: I used Mannix Heating and Cooling

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Marylu M.
01/2014
4.0
heating & air conditioning/hvac
  + -1 more
I contacted Mannix two different times for estimates -- the first time for an estimate for a humidifier, and the second time for an air conditioner and furnace. They were responsive and professional. Ultimately I chose to go with a different product (Lennox) and a different service provider.
Description of Work: .

Rating CategoryRating out of 5
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0


Leslie E.
01/2014
5.0
heating & air conditioning/hvac
  + -1 more
Mannix Heating & Cooling installed our gas heating system, and they do regular servicing on our furnace and air conditioning system. This is an outstanding company! Jerry Mannix & Co. are totally honest, totally competent, and they provide excellent customer service. We say this with a lot of experience with companies/contractors who we would not rate an A, so we know the difference!
Description of Work: .

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

James B.
01/2014
5.0
heating & air conditioning/hvac
  + -1 more
I used MANNIX HEATING AND COOLING
Description of Work: .

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$130

Kevin S.
12/2013
5.0
heating & air conditioning/hvac
  + -1 more
I called Mannix to repair my upstairs HVAC until locted in the attic. I called on Saturday morning and the receptionist was great and told me that they could see me that day. The technican arrived on time and fixed the unit very quickly. The technican also provided usefull information concerning the age and condition of the unit. Mannix will be my go to HVAC company in the future. This experience was great in every recept.
Description of Work: Repaired the heating unit in the attic.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$115

Justin P.
12/2013
5.0
heating & air conditioning/hvac
  + -1 more
They arrived on time and were very professional and courteous. Would recommend.
Description of Work: Firm was used to provide HVAC service.

Rating CategoryRating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$150

Domenica B.
12/2013
5.0
heating & air conditioning/hvac
  + -1 more
We needed our Heat Pump system replaced and had one estimate from another company before having Mannix to our home for an estimate and information. Steve came to our home and provided us with detailed information on the different systems they offer with the benefits of each, pricing - including rebate offers, etc. My brother works in HVAC, so I spoke with him before hand to get some background information, and I was incredibly impressed with the information Steve shared and his honesty about it all. The whole process went very smoothly from beginning to end and we couldn't be happier. They installation went very well and the system is so much better than what we had. We will definitely use Mannix again in the future when we need to replace our other system.
Description of Work: Replaced Heat Pump HVAC system

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$9,500

MARIE N.
12/2013
1.0
heating & air conditioning/hvac
  + -1 more
My furnace broke on Christmas day. Mannix Heating and A/C listed 24/7 service so I called and notified the call center I needed my furnace repaired. I asked if they had technicians on call for Christmas and the call center confirmed they did and that a technician would contact me shortly. I finally received a return phone call on 26 December (after I had scheduled an appointment with another company). I am upset that Mannix did not call back or tell me up front that they did not have technicians available. That would have been a completely acceptable response considering that it was Christmas. But to have the call center make me believe that I could get my furnace fixed that same day and then never returning my call is completely unacceptable. Providing expectation management to customers would ensure customers knew exactly what to expect rather than getting their hopes up.
Description of Work: No service provided since no technician returned our call.

Rating CategoryRating out of 5
responsiveness
1.0


Response from Mannix Heating & Cooling
While we do offer 24 hour emergency service and we had a tech on call for Christmas day, for some reason the answering service we use did not classify the call as an emergency and did not page the tech that was on duty. The call was classified as a non-urgent message to be called the next business day. We are very sorry this happened and we have addressed the situation with our answering service and thank you for bringing this matter to my attention. Jerry Mannix

Jason N.
12/2013
5.0
heating & air conditioning/hvac, water heater repair
  + 0 more
Back in 2010 in they installed a new heatpump and... whatever the internal piece of that was, "air handler?". In addition, they added a whole house humidifier. The system wound up being a lemon, along with enough from Carrier that Carrier did a recall on them. So, Mannix installed the new system quickly and efficiently. They're incredibly friendly, knowledgeable, and I will definitely go to them in the future.
Description of Work: .

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$7,000

William C.
12/2013
5.0
heating & air conditioning/hvac
  + -1 more
Both of my HVAC systems were 20 years old and failing. I have two indoor gas furnaces (basement and attic), and two outdoor AC units. I received quotes from four contractors (all highly rated on Angies List), and the Mannix quote was the best. Jerry Mannix arrived at the exact time he said he would for the initial quote, provided a detailed explanation of the work to be performed and, to my surprise, said they could complete the job in one day by bringing out two crews. As promised, both of the crews arrived early in the morning on the day promised, and had both systems installed and running by 4 PM that same day. They took great care to protect the flooring and removed all of the old hardware and trash. And there were no surprises, no additional/unexpected work that was required. The work entailed the installation of two complete Carrier systems -- inside and out -- and installation of new programmable thermostats. I am very pleased to have (finally) found an honest/reliable HVAC contractor and would highly recommend Mannix Heating and Cooling.
Description of Work: Replaced two complete HVAC systems (indoor gas furnace and outdoor AC unit).

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$9,450

Contact information

26955 Gum Spring Rd, Chantilly, VA 20152

http://www.mannixhvac.com

Service hours

Sunday:
Closed
Monday:
8:00 AM - 6:00 PM
Tuesday:
8:00 AM - 6:00 PM
Wednesday:
8:00 AM - 6:00 PM
Thursday:
8:00 AM - 6:00 PM
Friday:
8:00 AM - 6:00 PM
Saturday:
9:00 AM - 1:00 PM

Licensing

Bonded

Insured

Licensed*

Trade License Number
2705135017
Trade License Locale
VA
Trade License Authority
Virginia Department of Professional and Occupational Regulation
Trade License Expiration
05/31/2024

Eco-friendly Accreditations

LEED Accredited Professional
No
Energy Star Partner
No
EPA Lead-Safe Certified
No
Use Green Products or Work Practices
Yes
State Contractor License Requirements

All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our State Contractor License Requirements page.

*Contact business to see additional licenses.


Service Categories

Heating and Air Conditioning

FAQ

Mannix Heating & Cooling is currently rated 4.9 overall out of 5.

Sunday: Closed

Monday: 8:00 AM - 6:00 PM

Tuesday: 8:00 AM - 6:00 PM

Wednesday: 8:00 AM - 6:00 PM

Thursday: 8:00 AM - 6:00 PM

Friday: 8:00 AM - 6:00 PM

Saturday: 9:00 AM - 1:00 PM

Mannix Heating & Cooling accepts the following forms of payment: Check,CreditCard,Financing Available
Yes, Mannix Heating & Cooling offers free project estimates.
Yes, Mannix Heating & Cooling offers eco-friendly accreditations.
No, Mannix Heating & Cooling does not offer a senior discount.
Yes, Mannix Heating & Cooling offers emergency services.
Yes, Mannix Heating & Cooling offers warranties.
Mannix Heating & Cooling offers the following services: Heating & air conditioning - repair, replacement & installation, water heaters, humidifiers. Electrical - upgrades, generators. Service agreements
Window Units, New Construction HVAC Systems, Oil Furnace Repair

Contact information

26955 Gum Spring Rd, Chantilly, VA 20152

http://www.mannixhvac.com

Service hours

Sunday:
Closed
Monday:
8:00 AM - 6:00 PM
Tuesday:
8:00 AM - 6:00 PM
Wednesday:
8:00 AM - 6:00 PM
Thursday:
8:00 AM - 6:00 PM
Friday:
8:00 AM - 6:00 PM
Saturday:
9:00 AM - 1:00 PM