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Signs and symptoms of carbon monoxide poisoning may include:

Dull headache
Weakness
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Shortness of breath
Confusion
Blurred vision
Loss of consciousness

Carbon monoxide poisoning can be dangerous for those who are sleeping or intoxicated. People may have irreversible brain damage or can die before anyone realizes there’s a problem.

When to see a doctor

The warning signs of carbon monoxide poisoning can be subtle. But the condition is a life-threatening medical emergency. If you think you or someone you’re with may have carbon monoxide poisoning, get into the fresh air and seek emergency medical care.

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HAMCO Heating and Cooling Ltd.

4.8

Based on 523 reviews

See all reviews Write a review

Bonnie King

22:48 21 Dec 24

Najim was very knowledgable and he quickly diagnosed a serious problem with our furnace. He reinstalled the venting, put in a new motor and thermostat. He was very efficient, polite and our furnace is working perfectly again! I highly recommend HAMCO and technician Najim and will definitely call them for future service needs. Thanks!

N Al

22:00 12 Dec 24

Today I received maintenance service form Najim. Next time when I need service definitely I'll ask for Najim. Najim is an expert in his field, his work was excellent, he answered and explained everything thoroughly. On top of all he was very friendly with a great personality.

Ronald Castellani

21:26 12 Dec 24

The repair by Najim for Hamco was timely, and worked perfectly. Thanx.

Aurelia Shaw

21:14 22 Nov 24

We've received good service from Hamco for many years. Today a new service person named Najim arrived to do the regular maintenance on our furnace. He was thorough, friendly, answered our questions clearly and made sure we understood how everything had been updated. I have no difficulty recommending this company.

Danielle Drake

14:08 13 Nov 24

When our AC stopped working this summer, we were so thankful to receive professional and friendly service from Hamco. Mike was quickly able to identify the issue and had parts on hand to get it fixed the same day!

A Marini

01:19 08 Nov 24

Thanks to Nolan T. for doing such a great job on our annual furnace maintenance! See you soon!

Omar Atiyeh

18:59 31 Oct 24

Hamco is an amazing family run business that have all the expertise you'll need!! If you're looking to upgrade, repair or maintain your residential and/or commercial HVAC equipment, they're your top choice in Hamilton and surrounding area!

Karin Griffin

01:22 24 Oct 24

Nolan is our usual tech for anything AC/furnace! Very professional, always able to answer any questions/concerns and quick to come and help when we need him!

Taylor Who

21:28 22 Oct 24

I recently had my furnace serviced and the technician, Mike K. was incredibly polite, informative and efficient. I will definitely be using Hamco again when needed in the future because of the great service and will definitely be suggesting Hamco to my friends and family needing service!

Kyle Maloney

20:27 22 Oct 24

Had Nolan come and install my new AC unit. Did a great job, showed me how everything works.

James Jennings

20:05 22 Oct 24

Mike the Hamco Boiler & HVAC technician was excellent: effective in reolving our issue, and did it very efficiently, politely, and professionally.

Evan Stott

18:18 22 Oct 24

Mike Kawa is the best technician I have ever had the pleasure of working with

E C

17:12 22 Oct 24

Just had my houses heating repaired, it was timely, extremely well managed and very thorough, the serviceman Mike Kawa even went through the trouble of explaining what went wrong with it and how to avoid it in the future. 100% will be recommending Hamco to my friends and family and even coworkers. Very impressed!

Brittany Werner

14:42 22 Oct 24

We had a couple issues with our air conditioning unit this summer as it's getting old. Our technician Mike was so helpful and got it working fast! My family was so happy we didn't have to go long without it. Friendly and efficient service.

Madison Rogers

14:29 22 Oct 24

I had a speedy and fantastic experience with hamco. Mike k helped with my furnace and gave me honest, unbiased advice. Highly recommend I won’t go anywhere else!

rolfe baltzer

15:42 21 Oct 24

Najim serviced my furnace professionally and was friendly. They cleaned and did a safety check at good value! I will use them again.

Knollis Johnson

18:56 19 Oct 24

The agent from HAMCO arrived with the suggested window. Najim, the technician, quickly diagnosed and resolved the issue. He also provided useful information about the state of my furnace and air-conditioner.

Peter Billings

20:03 18 Oct 24

Najim, from Hamco provided great service , was on time and able to complete the gas valve replacement on my 16 yr old furnace within 3 days of initial visit. I highly recommend Hamco for Heating and cooling services in the greater Hamilton area.

Tara Smith

18:40 16 Oct 24

We had Hamco come for a service check for our boiler, and Mike K. Our technician was great. He explained what the issues were and what needed to be done to fix them.

EBJ

00:14 16 Oct 24

Recently called Hamco for an emergency with our heating system. Our tech Mike was there in record time and had us up and running in no time. He was polite and efficient and we will definitely be calling again!

Dahyabhai Patel

00:14 10 Oct 24

Great to work with - thank you!

Alexandra Porter

17:19 04 Oct 24

We had Nolan as our technician and we were very pleased. Very kind and knowledgeable! We highly recommend him and Hamco

Melissa Jones

17:06 04 Oct 24

Nolan was our service person and he was very polite and prompt. I hope we always have him as our service person. He was such a pleasure to deal with and so knowledgeable!

kim jones

16:51 04 Oct 24

I recently needed some help and the technician who came was great. He explained everything that he was doing, even gave me some tips to be more efficient. These kinds of calls always make me anxious, worrying about how much the bill will be? Will I get a good technician who is honest and knows what he/she is doing? All went well and I want to thank Nolan T. for his professionalism and easy-going manner. Thanks Nolan and thanks Hamco!

P B

01:51 04 Oct 24

I recently had Mike from Hamco perform my annual maintenance and I’m extremely satisfied with the experience. From the moment he arrived, he was friendly, professional, and clearly very knowledgeable about heating systems. Mike took the time to explain everything he was doing and offered useful tips to help me maintain the furnace through the colder months. His thorough work gave me confidence that my furnace is in great shape for the winter. Mike is definitely a valuable member of the Hamco team, and I’ll be requesting him for future service! Thank you Hamco

Bri Chernesky

18:54 03 Oct 24

Had maintenance done on my ac and furnace and mike was very helpful and informative. Very pleased with the service and will use hamco again in the future.

joel dixon

18:33 03 Oct 24

Had our annual maintenance done, quick, affordable, and mike was a great technician for them to send, highly reccommend hamco!

Jacob Bakalar

15:58 03 Oct 24

Hamco is great !!I had mike come out for a service call and he was super helpful

carmella dorsay

15:35 03 Oct 24

We had Mike Kawa from Hamco service our furnace and air conditioner. We were more than pleased. Well spoken, polite, courteous young man. He was very informative and knowledgeable! We will definitely be recommending and using your company again!!Marco and Carm Tesolin

Daniel

15:08 03 Oct 24

We had Hamco come in and service my father's furnace. The technician that showed up, Mike, was extremely professional, knowledgable and talked through the issue with myself and my father. He showed up on time and aware of the work needed to be completed. The price was very reasonable compared to quotes we had received from other places. I have already recommended Hamco to all my friends and family.

Ritchie Taylor

15:02 03 Oct 24

Mike serviced my system some time ago and gave fantastic service. Will be requesting him every time!

Justine Jones

19:29 01 Oct 24

Great service. Nolan is a wonderful technician. Highly recommend

19:35 30 Sep 24

I had service man came to service my furnace today. I was late meeting him but he waited for me. He was very courteous in dealing with. I am very pleased with the services. Thank you very much Najim for getting my furnace ready for winter.George

Wa Cas

17:51 28 Sep 24

Our service specialist Najim was a pleasure to deal with. He went above and beyond the required service needed. Respectful, extremely knowledgeable and hard working, this specialist had it all. I will solely be dealing with him in the future. Thank you Najim.

Bri Mil

15:25 25 Sep 24

We had a service call to check on a furnace problem. The Service Technician, Steve, was a real pleasure to meet and deal with. He was extremely professional and knowledgeable. He quickly found the problem and offered suggestions as to resolving it.

Shannon Sinclair

15:03 18 Sep 24

Christian from Hamco came by to do an annual maintenance on my furnace. It is a brand new furnace that I bought from them last year, but doing the yearly maintenance increases my labour warranty. Christian was efficient, very kind and punctual. I will be a longtime Ho customer

Joan French

18:37 13 Sep 24

After replacing our furnace and installing a central air unit with Hamco we've had nothing but excellent, attentive service that is reasonably priced and achieved both on time and with great courtesy. Christian just performed the yearly maintenance on both units, and thanks to him we're all set for winter! There was an issue with a part he quickly and efficiently replaced, and I'm certainly happy to know it now instead of during the first cold snap.

Mary Smith

17:58 13 Sep 24

Just had my furnace serviced for its yearly checkup. Christian the service technician was polite, he explained in detail the bill to me and what was done. Excellent service.

Charlene Kump

15:01 13 Aug 24

We had no hot water. I called after office hours and left a message. They returned my call before 9 am. And a very nice gentleman named Najim had it working by 11 am.Will definitely call again!

Larry Adoranti

19:20 30 Jul 24

Air conditioner service required due to non-cooling. Called Hamco first thing in the morning and fixed early afternoon. Exceptional courteous service beginning at reception who booked the service and by Najim, the onsite technician. Najim was amazing, very professional and knowledgeable and he looked after a few extra items while he was here - cleaning, taping gaps in duct work, etc. Thank-you Najim!

connie marshall

19:06 24 Jul 24

Excellent service! Called them for a 2nd opinion, and boy did they deliver. They followed up with manufacturers of our heat exchange and found out it was under warranty. Going the extra step, saving us over $2400 based on quote from the other guys to replace. We know who we will be buying our new system from when needed. Thanks Najim for going the extra mile!

U K

20:10 09 Jul 24

I should have called HAMCO right from the beginning! Me and my family suffered with no AC for a week during the hottest days yet this summer! Corey from HAMCO came bright and early this morning and solved the problem. Very professional, knowledgeable and respectful, he got the job done in no time. Thank you Corey and HAMCO!!!!

Peggy French

15:21 09 Jul 24

Fearing an exorbitant bill, I reached out to HAMCO for a Saturday service call during another heat wave. Christian from HAMCO promptly returned my email and explained the charges, both 'real' and potential. He arrived when he said he would (rarer than it should be!) and immediately set to work. He efficiently and effectively diagnosed the issues and had a well-stocked truck that allowed him to fix both issues and restore my air conditioning. Thank you, Christian! The price was very reasonable and below what I expected to pay under the circumstances. I will continue to recommend HAMCO! Strangely, my two neighbours to the north have both had their air conditioning fail over the last 10 days and neither received timely nor exemplary service from their providers, who were NOT HAMCO.

Marchese Pharmacy

23:45 04 Jul 24

We have used Hamco for our pharmacy business for many years. They are the reason our customers and staff are always kept comfortable in the store. This year, they even helped solve a tricky problem with our compounding cleanroom airflow and pressure balance. Just awesome guys. Wish I could give more than 5 stars.

Faisal Khawaja

23:33 04 Jul 24

My AC went out last week, in the hottest days of the year. The Hamco tech showed up on schedule, fixed my AC quickly and professionally. And the price was right. This is why small, family-owned businesses are the best! They have a customer for life.

Michael S

21:47 27 Jun 24

Christian came to my place today and he was very friendly, professional, and helpful. He listened carefully to my concerns. He was patient and not condescending while he explained how the AC worked. He was able to find an important adjustment that was necessary and now it's blowing twice as cold!

Gillian Guthrie

14:18 15 Jun 24

There I was… with an rv hot water tank that needed to be replaced and some propane lines that were beyond sketchy. I didn’t know how to resolve these issues and who would take on such a project. I reached out to Hamco and although rv trailers are not something they usually tackle, they cared enough to listen. They understood I needed help and they took this job on. Right away, Nolan was out to do an on-site inspection to get a better understanding of what was involved and what needed to be done. He was so professional, personable and knowledgeable. He got right to the task at hand and understood quickly what needed to be addressed. A date was easily booked through the helpful and courteous office team. On June 12, 2024 Nolan returned and again, wasted no time diving in and getting the old hot water tank out and installing the new. Repairing the propane lines and testing and checking all the new system. I can’t thank Nolan, Jordan, Veronika and the rest of the team at Hamco enough for caring, going the extra mile and helping me out of a real jam. It’s not always easy for a service company to achieve the highest level of service that it’s customers expect… but Hamco sure did reach it here.

Ruth Wells

20:56 28 May 24

I have used Hamco service for 25+ years and have a Hamco installed furnace & air. I use their service for both spring & fall maintenance. They have been very helpful to the point of helping to keep my very old heating system as long as possible. Recently I had the spring maintenance service & there were a couple of problems after it was completed. I spoke to Tara who was very helpful & patient with my explanation of what was happening. A couple of days later Mike came to investigate the problems & quickly solved the problems & explained what was happening. They were both very helpful and considerate.

Gail Bauer

19:06 26 May 24

A great company to deal with!!! Tara helped direct me to the right person for ordering a hot water heater which was installed by Adam and Veronika. I have been a long time, happy customer.

charles shields

03:22 23 May 24

It feels like Summer is already here and so thankful that we purchased our new York A/C from Hamco a few months ago. It’s running great and keeping our house nice and comfortable. We have been a customer for many years and can’t be more pleased with Sales (Andrew) Service (Shane) and Customer Service (Tara). All so friendly and knowledgeable.Quick story: Two winters ago my wife and I were visiting my daughter and her family in Switzerland. We were there for 2 months and while away we had a good friend checking the house on a regular basis. A month into the visit I received a text that there was an issue with the furnace. The condensate drain line was leaking and had to be fixed/replaced asap. A 6-hour time change made phoning a challenge however, after talking with Tara and Shane we were relieved and the repair was made the next day. Where do you get Service like that!Thanks again to the HAMCO Family!Regards,Charles D. Shields

Eu Kh

20:34 13 May 24

We were really impressed by professional work and customer oriented attitude. Veronica and Corey were great. They went out of a way to make it fit in our complicated setup.Thank you guys!Addendum:Thanks to the professionalism and understanding of Margaret, We were able to setup a service call for the annual maintenance in a short time, so our furnace is ready for the next season.Thanks again!

Greg Gabel

16:18 06 May 24

HAMCO is an experienced HVAC shop with great people. We have used them for a number of commercial service jobs. Could not recommend more.

David Ward

01:22 04 May 24

I have used Hamco for many years now and have always been pleased with the services that they provide, from both the helpful administrative personal and their knowledgeable technicians. Hamco is my first choice and the company that I highly recommend to others.David Ward

Adam Adam

17:07 01 May 24

We have been using Hamco for years. And only use them for all our HVAC/Boiler repairs. Nolan is a great tech and Cherryl is great to deal with in the office.

Ron Vandermeulen

19:38 29 Apr 24

New furnace installed by Hamco this morning. Veronka and Adam did a fantastic job. Very considerate and very professional! Great experience all around. Great people, great company. Ron VanderMeulen.

Lina DB

18:20 29 Apr 24

I highly recommend HAMCO. The customer service person DENISE is the best. She is always willing to help and sort things out for you. Thank you DENISE 🙂

Victor Renzella

16:25 29 Apr 24

I have been dealing with Denise for years and I find her very professional and helpful. I will continue to use Hamco because of Denise and the great service we receive.Victor Renzella

Catarina Santos

14:36 29 Apr 24

Thank you so much Cherryl Skinner, for your help and guidance.You are amazing 👏

Steven Tran

13:25 27 Apr 24

Great team and extremely knowledgeable. Guided us on our heat pump purchase. Cherryl in the back office was amazing to work with

Graeme Moss

22:58 25 Apr 24

Had a new AC put in.Murray & Adam were the technicians. Friendly, fast, helpful. Impressed.They finished ahead of time.Impressed and thank you!Hamco, both product and services are reliable.

Jeff Vaughan

22:48 25 Apr 24

Excellent service from Nolan! He got us out of a jam and made the experience enjoyable. Called at 7 am and he showed up around 10 am. Can't ask for faster service.

Martello Restaurant

15:17 24 Apr 24

Always excellent service from Hamco! They are prompt, professional and enjoyable to work with. Cherryl has always been a lovely person to interact with and very helpful with booking service and handling billing!

Bernie's Tavern

21:14 23 Apr 24

Always a top notch experience when dealing with Cherryl! Very pleasant and knowledgable

Nairne Holtz

13:32 20 Apr 24

Small landlady here. I've used Hamco many times over the years and they get there on time and they get the job done. A shout out to Cheryl in Accounting who always answers my questions and sends out the invoices promptly.

Kathy Pleasance

17:39 19 Apr 24

What makes a great company is their staff.They were all very professional and courteous.A special call out to Cheryl Skinner whois always ready to go that extra mile fora customer.I would recommend this company without hesitation.Great price, great service, and especially great people.Thank you Cheryl.

Aya Dental Centre

20:42 18 Apr 24

We have a yearly Maintenance Contract with them for the last 3 to 4 years and they deserve more then 5 stars.DENISE is always helpful & accommodate us in emergency.So, 5 stars for Denise also.

Wail Dimassi

19:22 18 Apr 24

Thank you Margaret for setting up our Annual furnace inspection and cleaning to meet our availability. It is great to know that I never have to worry about scheduling this as you are always on top of it.

Brandon Lovas

20:02 17 Apr 24

Nothing but good things to say about my dealings with Cheryl. She was professional, understanding and courteous. I would definitely recommend Hamco for any of your heating and cooling needs.

Margaret Wilding

19:52 17 Apr 24

Hamco looked after us really well. An especial shout out to Cheryl in Accounting for helping me keep track of my e-transfers!

Mark Preston

19:50 17 Apr 24

Have had two furnaces and an AC unit replaced in the last year through Hamco. Always happy with the service. Cherryl in accounts is always a pleasure to deal with as well.

Tabatha Mouland

12:28 17 Apr 24

As a House Manager for a larger private residence with an extensive HVAC system we relied on the Hamco team to service our system seasonally, as well as assist when there was an issue. The team is reliable and knowledgeable but the star of the team is Cherryl who was always a delight to work with. Highly recommend.

Frank C.

15:20 16 Apr 24

April 2024: Just a quick post to thank the accounting lady at Hamco (Cherryl) – the one who asks for money. I want to acknowledge her pleasant and friendly attitude. Last year, when I had requested an invoice for a recent service call – through a miscommunication, she pulled out our last 10 years of past invoices, and sent them all to me. Now who else would do that – and still be smiling? Only Cherryl. Thank you!Jonathan at Hamco just completed our annual (June 2023) York A/C maintenance. He went above and beyond - which is always the case with Hamco and their technicians. My thanks go to Shane and his crew.Hamco just finished this year's (2021) annual maintenance on 2 furnaces. Technician (Eric) did a bang-up job - knowledgeable, efficient and courteous - thank you !!Once again Hamco earns its stripes. Had them in for regular furnace maintenance. Andrew M. was everything you would want in a technician - skilled, professional and pleasant. Been using them for many years and highly recommend them. Two thumbs up!We had a noise problem with 1 year old York AC. Shane addressed the problem promptly. Within a day, technician Andrew was on site, diagnosed and fixed the problem within minutes. Thanks to both

Goofy Girl

15:06 16 Apr 24

This company has amazing customer service. The staff is great, especially Cherryl in the accounting department who helped me out when I quickly needed to change my monthly billing after my credit card was stolen. The whole place is wonderful. I can not say enough about the customer service.

Frank Ciancone

14:30 16 Apr 24

Dealing with Hamco was very easy, efficient and honest. Service was prompt and affortable. A special thank you to Cherryl Skinner for taking care of our account in a most professional and consciousness manner. Recommend without hesitation.

CeCe Elfie

14:18 16 Apr 24

Want to give credit to the ladies who work in the background. From answering the phone, scheduling and finance. You all are amazing. Cherryl from finance is always so helpful and friendly. You need someone like her on your team.

Joanne Stokes

14:13 16 Apr 24

Can't say enough about the staff - hats off to Cherryl in A/P who ensures invoices are sent out in a timely manner and should there ever is an issue she is quick to help and get everything sorted. Thanks Cherryl! Joanne from Appleridge Co-operative Housing.

Adri Greenspan

13:37 16 Apr 24

Love communicating with Cherryl Skinner from accounting. Always curtious, follows up with gentle reminder to pay :))) we need more people like that. Money is not always Pleasantville deal with so it's nice to have pleasant moments around it. (Dear Grain Bakery).

Jessica Simpson

13:33 16 Apr 24

HAMCO has provided excellent service at our home a number of times now. The entire team is always fantastic, and I've especially appreciated Cherryl's friendly attitude and prompt invoicing over the years. Thank you!

Kathy Dimassi

13:08 16 Apr 24

Thank you Cherryl Skinner for being on top of all our billing so that payments are made quickly and efficiently. We appreciate your fast response to all billing equiries.

Paul Donoghue

12:24 16 Apr 24

We had our furnace, ventilator and some ducting replaced during a renovation of our condo - a major project. The team did a terrific job of removal and installation. The whole HAMCO experience was excellent, including the "back office": Cherryl in Accounting was super responsive throughout the process and is a really excellent rep for the company. Thanks, Cherryl. Let's hear it for Accounting!!

Givic Tracker App

01:55 16 Apr 24

Hamco Heating and Cooling is a great hvac contractor but what makes them even better than everyone else is their amazing staff. Speaking of which, when it comes to meticulous administration of Hamco's payables & receivable , no one is better than : Cherryl Skinner

Elizabeth Enns

21:53 15 Apr 24

Want to share that Cherryl account manager is the best! She helped with my service plan and scheduling and even got me some $ back!

Stef Caunter

20:17 15 Apr 24

I use and recommend Hamco for everything. Great technicians. Excellent people. And Nick and Veronika did a terrific job for us. Tidy professional job.

Peter Neumann

18:12 15 Apr 24

We at Martello Restaurant have been working with Hamco for several years and have nothing but the highest accolades for their services, including working with Jordan Vasilak who oversaw the installation of our HVAC systems, but also with Cherryl Skinner in their accounting group, who has always been professional and pleasant and kind in our interactions and communications. We highly recommend Hamco!

Christopher Demelo

00:16 13 Apr 24

The tech that came by Christian, did a wonderful and professional job. Would reccomend to friends and family

Keith van Kessel

21:05 11 Apr 24

Great company would recommend to anyone. Ask for Mike!Edit: we've had Hamco over a couple more times since this review. Probably the best HVAC company in town. Quick, great work at a fair price.

Alan Lambshead

15:39 06 Apr 24

Earlier this week Hamco replaced my gas furnace and air conditioner with a new multi stage furnace and heat pump. The team was led by Shemar assisted by Nick, Veronika and Tony. They were courteous and efficient, and the work of removal and installation of the new system went smoothly. They did a great job of cleanup in the work area, and outside where the hear pump unit is located. Thanks to the installation team, and to Andrew who did the upfront work of finding the right solution for us.

Jean-Claude Chambers

15:29 15 Mar 24

Our old rental hot water heater burst, which left us with a bit of a flood and no hot water. We phoned around to the big box retailers to purchase and install a new hot water tank. The install dates were anything from 7 to 14 days wait. I phone Hamco, and they sent a rep that afternoon to estimate the job. The install was completed next day in 2 hours. Excellent service and competitive price. Highly recommend.

Elisabeth Gedge

12:45 15 Mar 24

Yesterday the Hamco team replaced my furnace and air conditioner, and did a wonderful job! Led by Shemar, they were courteous and efficient, and the work went smoothly. Shemar added some unexpected touches - a handle for easily removing the filter, and a pouch for storing the manuals - very helpful for a forgetful and arthritic senior! He helped me set my thermostat and talked me through all decisions made. Thank you to a great team: Tony, Jonathan, and Shemar, and to Steve, who did the diagnostic work on the old furnace and a/c. Congratulations.

mark salata

15:11 14 Mar 24

Nolan is a professional service technician. He provided knowledgeable service in a timely and efficient manner. We are pleased with the service provided.

Andy Kleiner

14:25 29 Feb 24

Thank you Christian for your extra attention! Truly, everyone at Hamco has been really easy to work with over the years, always friendly, and the units works great!So far, I’ve always felt safe inviting Hamco employees into my home and this is really important to me as a queer person with disabilities. Thanks!

Nicholas Frisby

18:27 27 Feb 24

Excellent service and knowledgeable staff! My go to Heating and Cooling company moving forward!

M1CAustin

03:56 25 Feb 24

Christian from Hamco did a super job getting our furnace up and running after it failed to start on a cold Saturday morning. He was very pleasant to deal with, explained everything and kept in contact with us. Thanks Hamco!

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