Had some trouble with my AC. Called Cosmos because they had serviced the unit earlier. They were able to diagnose over the phone and save me a call out. read more

Made an appointment for yesterday 10/21. They no showed no called. No call Saying they needed to reschedule. This morning the doorbell rang and it was them, glad I was home to let them in since the appointment window was 10/21- 10-12pm. When the father ran the business it seemed to run more smoothly. George doesn't keep notes on service appointments or keep track of notes from previous appointments. I had to remind them about a recommendation they made over the summer for part to potentially fix a freezing issue with the AC and no one but me seems to remember the discussion. The techs are friendly enough but they are incredibly unorganized and lack attention to detail. read more

I requested a quote to multiple businesses for my Air ducts. Cosmos was very quick to reply and provided me with an affordable quote over the phone then Proceeded to come to my house to take a look and make sure we were on the same page! Then we scheduled an appointment showed up a bit late but was always communicating with me that was running a bit late not a big deal ! Service was great, very friendly and knowledgeable! Thank you so much for the service! Highly recommend read more

Cosmos is top notch and one of the best in the business. They replaced our furnace early in the year and most recently our AC system. Both times George was incredibly responsive, reasonable, and patient with us, traits that are now rare to come across in any home improvements industry for that matter. Absolutely recommend these guys! read more

I paid $200 to Cosmos for Gus and Carlos to inspect my short-cycling HVAC system, tell me I had two failing valves, and recommend a full HVAC unit replacement (estimated at $6400-7400). Fortunately, I hired another company to give a 2nd opinion after and their tech found a minor refrigerant leak causing the the issue, repaired the leak, added more refrigerant, and solved the problem for just $500. That tech also confirmed that the valves Cosmos said were faulty were, in fact, just fine - and he showed me that they were working. Cosmos pulled a total scam job and I felt like an idiot for paying $200 for that service call. Of course, when I called to tell them what happened after they left and request that they stop payment, they immediately cashed the check and avoided my calls. Avoid this company despite the positive reviews! read more

Another great save by COSMOS! Recently (Last week) we had an emergency in our attic HVAC. The overflow condensation pipe was actually overflowing and causing our ceiling on the upstairs ceiling to leak water. There was an obvious clog in the condensation pipe. I reached out to COSMOS (George) and, despite may service calls into his office due to the extreme heat, he came out to our house within an hour. After over an hour of "troubleshooting" and using his vast "tricks of the trade" he was able to isolate where the clog was (in a pipe in a wall!!!!). He then used several methods to dislodge the blockage. After two hours my attic unit was running fine nice again with ZERO pipe blockage. COSMOS has saved us many times. If you need a reliable, expert, dependable, honest HVAC company that will do the job right, CALL COSMOS. George and Gus (Owners) and their team are amazing! Thanks again! David Olguin, Fairfax Station read more

Great service and fair prices. These guys were always honest with the issue and never tried to sell me anything I didn't need.

I've used Cosmos several times over the past few years for HVAC repairs. As a landlord I truly value their responsiveness and honesty. They recently were able to do a same day repair right before a snow storm. I've worked with many companies over the years and this father/son team gets my highest recommendation. read more

Called 4 different companies with an emergency AC issue with temps in the 80s inside and Cosmos was the first to respond and came out, SAME DAY. Fixed the problem, explained everything, all within the same day. Family company that I will recommend every time! read more

Wow is all I can say!! These guys are Fast, knowledgable, friendly. Not pushy, contract or money driven people. I felt like I was dealing with true professionals that did not cost an arm or a leg!!! This number is locked in my phone for the lifetime I own this home!!!! Not an ad these guys are legit!! read more

May 2020: just called them for an emergency service check no AC working, they arrived less than an hour from my call and fixed my unit for a fair price considering it was an emergency call. I was going on 83 degrees I'm home! Thank you for being so wonderful and responsive!! Aug 2018: Honest and super reliable! A UV bulb went out not too long after replacement, they honored the warranty and came out to correct! Great guys! Customer for life read more

Gus was great! Serviced my hvac and gave me some great advice for upkeep! Taught me how to use and maintain the heat pump since I have never dealt with one before! Most importantly, made the AC function so much better when it was 100 degrees out! :) read more

Our Hot water heater stopped working and when we opened the panel, there was an electrical problem which had melted the plastic and the Styrofoam. Very scary. I called Cosmos at 10 PM they called me back within minutes and came the following morning before 9 AM. They fixed it on the spot with new wires, plastic, panel and foam, and their rate was $200 less than I had expected. They gave me good advice about things I could do to reduce the risk of future problems with this. When I asked about replacing our hot water heater, They gave an estimate but said it could probably wait for at least another year, so to do it when it was convenient for us and within our budget. Or we could wait to see if we have any future problems and then replace it. I felt they were very honest, helpful, not pushy at all, and looking on giving me sound advice. I am so thankful. AHM in Alexandria read more

I called this company, who had been recommended by a friend, to come out as my HVAC wasn't working, to give me an estimate of what it would cost to fix it or replace it. At no point did they mention there would be a service fee with coming out. Upon arriving to my house, the owner and one other employee stayed a total of 25 minutes to tell me that the HVAC was broken and needed to be replaced. When I asked what that would run me, he then slapped me with a bill for $323. A $250 service call fee (for 25 minutes! of their time) and $60 in "parts". When I said no one told me there was a fee when I called to schedule the visit, and asked what the "parts" was referring to, the owner got nasty, yelled at me and said he had to replace a fuse on my existing unit, which subsequently blew up in his face (as if that were my fault). At no point did he, in all his supposed expertise, think to turn off the breaker and made it out to be my fault. Also, since when does a fuse cost $60? Upon expressing my dissatisfaction and given the owner's attitude and rudeness in my house, I paid the charge because I did not feel comfortable and wanted him out of my house. I followed up subsequently with an email and he refused to refund me for the service, even though I was never told there would be a fee associated in the first place. And a charge of $250 for 25 minutes of his time, and a fuse for a broken unit at $60, is exorbitant and frankly, ripping people off. Very rude, unprofessional, and uncomfortable experience in my home. read more

This company is very unreliable. I had a hot water heater installed by this company (note - they are not plumbers, but the hot water heater supplies the heat to my house). The hot water heater kept releasing pressure and the water that was flooding the catch pan was putting out the pilot light. I asked them to come back to fix it and they simply adjusted the water temperature lower until it stopped. Didn't really fix the problem, they simply hid it. This past winter when I needed some heat I had to adjust the thermostat in my hot water heater a little warmer. The system released the pressure and again put out my pilot light (I was left with no hot water for a shower before work). I contacted a real plumber who came and looked at my hot water heater. They determined that 2 parts were faulty (thermostat and pressure relieve sensor). Amazingly enough, it was beyond the 12 month warranty for the parts and I had to pay for the parts (and labor) myself. The new plumber advised that the "plumbers" who installed the hot water heater should have noticed the faulty parts on installation. Apparently they were in too much of a hurry to get their check and leave. I spent 3k on a hot water heater to be installed by this company and I'm very disappointed. i would NEVER let them touch anything in my house again. I thought I was fixing a problem by replacing my old hot water heater, but I created a bigger problem by hiring a sub-standard company. I've dealt with this mess for a year now and have finally got on the right track to getting it fixed for good (at my expense, not theirs). Do yourself a favor and find a better plumber (or HVAC technician) if you need any reputable work done. read more

The Cosmos crew arrived on time and got right to work. They worked efficiently and professionally, keeping me informed of their progress and asking me questions when needed. They kept a clean workspace and cleaned up very well upon their departure, a little earlier than I expected it would take. Best of all, their price was the lowest of the 3 quotes I solicited for my AC work. I will definitely make Cosmos my first call in the future! read more

My AC broke during this summer's heat wave. Cosmos Heating & Cooling was very helpful and responsive and easy to work with. They explained the problem and fixed my AC, it was 96 degrees outside. I highly recommend them. read more

Our AC stopped working on one of the hottest days this summer. I called Cosmos Heating and Cooling, and they were able to come that day. Gus and George were amazing. They quickly assessed the problem, replaced the broken piece, and had the AC working in no time. They were knowledgable and efficient. I highly recommend them! read more

I want to thank George and Carlos at Cosmos Heating and Cooling for their quick response to my repair request. They came when they said they would. They had the part and fixed the capacitor which was still under warranty. Cosmos originally installed the unit and if you are looking to replace your A/C you should get a quote from Cosmos. They saved me money. I highly recommend Cosmos. read more

I am a real estate broker and property investor. I have hired Cosmos many times for my properties as well as recommended them to our real estate clients. Cosmos is our, "Go to" company for HVAC repairs. They are reliable, dependable and priced appropriately. if you are in the need of any HVAC service or repair, you should call Cosmos! read more

Christmas Eve, and Gus and son have come to the rescue of my aging Hvac unit once again. I called as I had lost all heat overnight. They came the next day and within an hour everything was fixed. I can't recommend Cosmos Heating enough. Professional service at more than a great price. Happy Holidays! read more

Although my Home Warranty company didn't let me use their service (because my Home Warranty company sucks!!!); Cosmos was the first company to thoroughly check out my poor airflow problem and give me an experienced report regarding my HVAC systems issues. I wholeheartedly recommend this superior company! They know how to perform a full inspection of HVACs to diagnose possible problems. Great company!!! read more

My heater stopped working and while i have friends in all parts of the home construction field, HVAC is the only one I do not. I was recommended by my dad to contact Cosmos, he got to my home on time, figured out the problem so quickly, and provided the solution with no pressure! The cost was very affordable and I 100% recommend to all those looking for a hassle free trust worthy HVAC company!! read more

We had a house humidifier installed by Cosmos VA, and the entire job was very professionally done from start to finish! We could not recommend a better HVAC company, as we are very happy with the job, the professionalism, courteousness and the price! Thank you very much Cosmos!! read more

Cosmos heating and cooling were absolutely wonderful. Timely, knowledge and honest. I had a ridiculous quote from ARS and my friend/real estate agent highly recommended Cosmos for a second opinion and I am so glad I did. After inspection, they found the system was in working order, needed a little clean up and that was it. Cosmos literally charged me 5% of the lowest estimate from ARS. Additionally, they were nice, professional and understanding. I only wish I wasn't selling my house so that I would still have an HVAC for them to maintain! Do yourself a favor, use these guys. read more

Very courtesy and reliable. Gus, thank you for coming on short notice. Gus took his time to explain the whole HVAC maintenance and what was fixed and potential issues which he resolved. I would certainly recommend Cosmos, and in the future will look to them as my go to HVAC technicians. read more

We were very grateful they could make an appointment for next day service when we needed it. Our AC went out and we were leaving on vacation and so we needed immediate service. They came out, diagnosed the problem, supplied the part, and fixed it in under an hour. The technicians were helpful, knowledgeable, and prompt. read more

Extremely rude and unprofessional behavior from the owner of this company. Cosmo became very loud, agitated and defensive when asked simple questions about the service estimate. He started raising his voice at me, asking me why I was looking at him as if he were here to steal from me and accusing me of having an attitude with him. I attempted to reason with him, but he continued his tirade, yelling even louder and saying that he was here on a Saturday and that I didn't appreciate his help. I then asked him to leave, so he started slamming doors and continued yelling how ungrateful I was. I did not feel safe or comfortable with this individual and would not recommend his services. read more

I called at 5pm on a Friday night. George came over to my condo, helped me trouble shoot a problem with a water heater that kept going out. He recommended replacing the thermocouple. Since he couldn't replace the thermocouple, he didn't charge me for the call. I will definitely use them to service my water heater. Kudos to George! read more

The arrived on time, very nice, extremely knowledgeable and offered a great on going maintenance contract. Our 16 year old unit that most would say needed replaced, is still keeping us cool. I appreciated not getting the sales pitch and good reliable service. read more

I trust Cosmos to tell me the truth, whether its happy news or not. Lets face it, no one calls an HVAC company unless there uncomfortable. These guys get to tell bad news more often than most so being friendly,on time and honest is as good as its gonna get. No HVAC company has every part possible on the truck so be real. Honest, thorough, friendly, considerate and well trained is very very good. Ask for George, Gus needs a rest. read more

Horrible company! They don't honor the deal that they advertise. The $48 diagnostic service is a SHAM. They then change the terms and demand $200 for their "labor." Then, when you complain, they say they can "apply it to future installation" of an already overpriced machine. These guys reinforce the stereotype that you can't trust HVAC companies. Disappointing that they think they'll make money in such a commodity market. If you somehow get tricked into using these guys, make sure everything is in writing before they do anything or else you'll get charged for phantom work. read more

We had an emergency, and all the other 24 hour emergency folks said they couldn't come. He came out, told us the problem, and fixed it for a modest fee. Highly recommended! read more

When my AC stopped working I called Cosmos and they were at my house within 15 minutes. Very professional and didn't look for a way to up charge me when my fix was quite simple. I will use them agin next year when it is time for a replacement unit. read more

Don't call this company. Yes they showed up really fast but just say NO. I had an air conditioning problem. I realize it has been brutally hot outside but not a reason to take advantage of a consumer. I was given an estimate for a $1500 repair & was charged $190 just for the service call (still no AC). I called another company for a second opinion & cleaning my outside coils / $300 later I have any icy cold house. read more

I just wanted to comment on the unethical service that I received on Saturday. I noticed that my chimney was leaking water into my fireplace and out onto the hearth. I did an internet search of fireplace repair companies and somehow Cosmos made the list. After calling a few others that were closed on Saturday, I contacted Cosmos and explained my situation. I spoke to the man on the phone at length about the fact that water is getting into the house through the chimney and that the fireplace was collecting water. At no point did the man on the phone indicate to me that this was probably out of scope for the typical Cosmos contractor. Had he done so, I would have continued on down the list of companies that might be able to service my fireplace. Rather, he said someone could come by within an hour and that I would be charged $95 for them to come out and $95 per hour. This individual knowingly sent a contractor who would not be able to fix my problem in order to make a profit. When the contractors arrived, they even seemed confused as to why they were here and said multiple times that they are HVAC repairmen. Without even removing the fireplace insert, looking up the chimney, or taking out a ladder to look at the chimney cap, the contractor decided the cause must be some cracked silicone on the gas inlet tube. I'm pretty sure he knew this wasn't actually the problem and he could obviously tell my disappointment that Cosmos wasted my time and money on someone who was not qualified to fix the problem. After the contractors left the water continued to trickle into the fireplace so I pulled the unit out and discovered what I thought all along, that the water could not have possibly come from the gas line and that it could only have come from the chimney. At that point I was out the $95 that Cosmos charged me and it was too late for any other companies to send out a repair person. Now I have to take a day off of work to have the problem fixed by a chimney contractor who immediately knew the cause of the problem when I spoke to him on the phone. In short, I am disappointed that Cosmos would knowingly send someone unqualified for the job just to make a buck. I will not be using your company in the future should I have HVAC problems. read more