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Business Details
21 Years
experience
We have proudly served Highland and Northwest Indiana as a trusted HVAC provider since 2005. When you contact our company, you speak directly with the technician who will perform the work at your home. We bring over twenty years of industry experience to accurately diagnose and resolve complex heating and cooling problems. Our operational standard centers on providing straight answers and upfront pricing before any repairs begin. We consistently prioritize repairs over replacements, ensuring you never spend more than necessary to restore your comfort. If a replacement becomes the most financially sensible option, we provide written estimates at no charge and without pressure.

We maintain strict professional standards by guaranteeing full cleanup once a job is finished. Our commitment to honest, high-quality service has earned us a 4.8-star rating across 112 Google reviews. We believe in educating homeowners on their systems to help prevent future issues. You can rely on our licensed and insured team to show up quickly when your furnace fails in January or your air conditioner stops in July. We remain dedicated to delivering transparent, reliable solutions that prioritize your long-term satisfaction.
Mark Ortiz - Owner and Operator Collins Heating and Cooling Highland Indiana Collins Heating and Cooling - 2017 Photo shoot in Crown Point Indiana Furnace Maintenance Highland Indiana Air Conditioner Inspection and Tune up Our Official BBB Accreditation Certificate Angies List super service award HVAC highland Indiana 2016/17/8 People Love Us On Yelp Award - HVAC Highland Indiana We Install highly efficient Single Stage Armstrong Air Conditioners up to 16 seer throughout Highland & Northwest Indiana
Served areas
  • Highland Indiana, Griffith Indiana, Munster Indiana, Hammond Indiana, Schererville Indiana, Dyer Indiana, St. John Indiana,
Details
  • Year established: 2005
  • Licensed
  • Insured
Highlights and features
  • We have served Highland since 2005.
  • We provide upfront pricing before work starts.
  • We prioritize repairs over unnecessary replacements.
  • We hold a 4.8-star rating across 112 reviews.
  • We are fully licensed and insured.
Associations and certifications
  • BBB Accredited A+ Rating
  • Member of Highland Chamber Of Commerce
  • Winner of 2016 'People Love Us On Yelp' Award
  • Winner of 2017 'People Love Us On Yelp' Award
  • Angie's List Super Service Award 2017
  • Winner of 2018 'People Love Us On Yelp' Award
Payment methods
  • Cash, Checks, Debit cards, Credit cards
Services
AC Repair
We diagnose and fix air conditioners that fail to cool or run properly. Homeowners benefit from our upfront pricing before any work begins. Most repairs are conveniently completed in a single visit to quickly restore your comfort.
Furnace Repair
We quickly diagnose furnace problems with transparent pricing established before any work starts. This service targets homeowners needing immediate heat restoration during cold months. Most repairs are handled the same day to ensure your home remains warm.
AC Installation
We replace aging air conditioners with properly sized and highly efficient equipment. Homeowners receive free estimates on all installations without any pressure or commitment. This service ensures optimal cooling performance and improved energy efficiency for your residence.
Furnace Installation
We install new furnaces correctly sized for your specific home requirements. Homeowners receive a written estimate at absolutely no charge to allow careful decision making. This service delivers reliable heating performance without pressuring you into immediate commitments.
Indoor Air Quality
We provide whole-home air purifiers, Aprilaire filtration systems, and furnace humidifiers. This service targets homeowners seeking cleaner and healthier indoor air environments. Our solutions effectively remove airborne contaminants to enhance your overall respiratory health and comfort.
Videos
Reviews (38)
Erika Figueroa
Dec 02, 2023 Report
If you require assistance from a skilled professional in heating and cooling services, Mark is the one to call. When our furnace malfunctioned, Mark swiftly diagnosed the issue and efficiently repaired it. I wholeheartedly endorse Mark's services.
Joan Denny
Jul 08, 2023 Report
Mark provided excellent service! He promptly responded to our inquiry and conducted a comprehensive examination of both our AC unit and furnace, explaining everything clearly. He maintained integrity by not attempting to upsell unnecessary products or services. I highly recommend his services!
Tracey Frankland
Jun 15, 2022 Report
Mark, the owner, was very knowledgeable, professional, and explained all work in detail. Highly recommended for quality work at a fair and reasonable price. Service was prompt with great communication for updates on timeframe for service. Would definitely to use Collins Heating and Cooling for any future service and repairs. Service: A/C system repair
Nick Ernst
Jun 07, 2022 Report
Collins heating and cooling has helped my family out multiple times in the last eight months. As one example, my wife and I recently bought a house in the area that has had quite a few "hidden" problems to include needing a completely new furnace right as winter started. We called around to a few local HVAC companies and Collins heating and cooling were the only ones to answer immediately and arrive that same day.

By the time every other HVAC business called us back our problem was already identified and scheduled to have a complete new furnace put in merely days later. Mark is responsive, professional, and incredibly knowledgeable and not to mention personable. My wife and I recommend this business to everyone we know.
Jim Knight
May 22, 2022 Report
I was very impressed with Collins heating. They were so patient working to figure out exactly what was wrong and might I add there were several issues that they identified and cured the problem. Thank you
Lori Holman
May 18, 2022 Report
This company is GREAT! They installed my heating and air and all new plumbing in my house. Only had a couple issues with water (nothing major) gave them a call and they were here within the hour! I highly recommend Collins Heating and Air!
Eric Sera
May 16, 2022 Report
Great service, prompt, educated, and personable. Put in my hot water heater, furnace, and AC. Highly recommended. Services: Heating system installation, A/C system maintenance, Heating system repair, HVAC system maintenance
Max Hastings
May 08, 2022 Report
Mark is friendly and informative! He can give honest opinions on other estimates, and is not afraid to always put the customer first even if it means losing out on another bid by recommending going with a different company for a particular job if he determines that they will be able to satisfy the customer's needs better. Would highly recommend!
Chris Erffmeyer
May 07, 2022 Report
Mark from Collins was a pleasure to deal with. I got their number and his name from multiple coworkers and they/he lives up to the reputation. Very quick and responsive. They also came in well under the other quotes I had gotten for an ac and furnace installation from other local companies. I highly recommend them. Services: Heating system installation, Install thermostat, Install AC
Jonathan Lee
May 07, 2022 Report
Came out the same day I called. Within 48 hours I had a brand new furnace. You can't beat the price, quality, or the device.
Bobby Gatlin
Apr 02, 2022 Report
I called on a Sunday when my AC wouldn't turn on and was assisted over the phone in troubleshooting and the AC unit began working. Wasn't charged a dime. This guy is a class act and a true professional. Will without a doubt use him for all my heating and cooling needs! Service: A/C system maintenance
Rick Kellemen
Feb 17, 2022 Report
I called out a company (who will remain nameless) for a furnace cleaning because they were offering a special rate. From the moment the technician opened the furnace door he was painting a picture of gloom and doom and proceeded to tell me I needed a new furnace, along with multiple additional changes, and gave me a frightening price for the work required. I called Collins Heating & Cooling and they came out the next day.what a breath of fresh air.

The technician in this case happened to be the owner and he performed detailed diagnostics, talked me through the issues and options, and allowed me to make a choice with no pressure. In the end I decided to change out my furnace and the total price was a fraction of what the first company wanted to charge me, for the exact same furnace. Two days later I had a perfectly functioning, new furnace. Plus, the owner, Mark, didn't charge me for his hours of diagnostic work, and he fixed my humidifier, which had been out for several years, for free. They far exceeded my expectations and restored my faith in the meaning of customer service. Going forward I will never use any heating and cooling company other than Collins.
Amy Will Booth
Dec 30, 2020 Report
Highly, highly recommend Collins Heating and Cooling! Mark is an exceptional contractor and businessman. He is passionate about what he does, explains everything to you so you can understand, and cares about your safety. We needed a new furnace, & ended up purchasing a new furnace and air conditioner from him, as the furnace/ac were 20 plus yrs old. I called him on a Monday morning, explained to him the unfortunate horrible experience we had with a Nipsco ESP contractor a few day prior, and he made the time to come to our home a few hours later.

Which impressed me, because this was a full, busy day for him. We will only use him from here on out for all our heating/ac needs. If you're looking for a friendly, honest, knowledgeable contractor than Collins Heating and Cooling is our recommendation! Thank You Again Mark!!!
Frances Boerner
Jul 16, 2020 Report
Extremely professional, very timely as said. Was able to help us a few days before expected. Got the job done much sooner than expected, very informative and helpful. Will definitely choose Collins over everyone, Mark is great and a huge Godsend! Thank you, thank you!
Jessica Thomas
Jun 26, 2020 Report
I called Mark on a Saturday, left a message and he called me back within a half hour and made it out within 2 hours to fix our AC unit! Mark is extremely professional, friendly, and runs his business phenomenally! I highly suggest you call Collins Heating & Cooling first!
Cathy Yuraitis Evans
Jun 03, 2020 Report
Called last minute and Mark came out and helped us out. Was pretty late in my opinion (7:30pm) and he showed up close to 8PM. Fixed what was needed and will come back for a A/C tune up. Highly recommend him! Our A/C we found out is almost 20 years old and is still going. No need to replace just yet. Go to him for any needs!!
Felicia Kowalski
May 15, 2020 Report
When my mom's furnace went out, I started calling around to find someone who could replace hers. I ordered her two space heaters to help while we waited to get someone. I live in Ohio so I was calling blind. Mark responded to my call immediately and he worked with me and all of what I asked him to do without any hesitation. My mother is very hard to please and she absolutely loved him. He was professional, courteous, and quite timely.

His price was more than fair and he had the furnace replaced and working before she even got the space heaters!! I would highly recommend Mark and his company to anyone. He is the very picture of what an honest business man should be. We need more like him!!
Mary Mysliwy
Jan 06, 2020 Report
We have used this company multiple times on different apartment units. Truly a company you can trust. Reasonable prices, quality work and very honest. We will continue to recommend them!
Brian Gilligan
Jul 06, 2019 Report
Mark took time out of his busy schedule on one of the hottest days of the year to service my air. Unfortunately the power went out again in Munster and he could not service the unit. He came back the next day and had it up and running in no time. Highly recommended!!!
Maryann
Jul 25, 2018 Report
Mark is the BEST!! Very friendly and honest. He explains everything thoroughly and is very reasonably priced too. He will also go out of his way for you to get a job done.
Business response
Thanks Maryann for the review. It truly means a lot to our Collins Heating & Cooling team. If you need anything always feel free to give me a call.
Deanna Marie
Jun 19, 2018 Report
This guy was awesome and best of all kind. My child LOVES to ask questions and he had not one problem answering all her (sometimes) annoying questions. He was also super informative of everything that was being done. Great work, and amazing customer service.
Dina Capranica Barron
Mar 14, 2018 Report
Mark was very professional and super friendly. He explained clearly what was causing our thermostat to malfunction. I ended up having him come back to install a humidifier on the furnace so our skin doesn't itch so much in the winter. Mark has a real passion for his job, charges reasonable rates, and he gives great restaurant recommendations too!
Jose R Arbelaez
Jun 14, 2017 Report
My AC stop working and I called Mark and with the short notice of 30 minutes he was at my home. He was great and had an amazing work ethic. He fixed my AC in no time and now my family is enjoying the nice cool air!
Nancy Ofcky
Ive dealt with several guys who were suppose to be professionals at heating and cooling and not one of them knew what they were doing until i met mark. Hes so honest and trust worthy and wont quit until the problem is resolved. I highly recommend collins heating and cooling to anyone. I was so blessed when i met mark. He is the best there is and i have dealt with so many dishonest people. I can guarantee u wont be dissatified. I rate mark a ten. Love his bussiness.
Christine Lee
Mark helped with my parents heat. It just stopped working one night and they panicked because it was cold. But,I called Mark and Mark came out right away and took care the problem quickly. Can't recommend him enough. Thanks Mark!
Gina Posipanka
Excellent customer service and very professional honest company ! Came out to install our new furnace after we discovered a gas leak on our very old furnace, it needed to be replaced and he recommend a great solid product and was very prompt and courteous. Mark is phenomenal he lent us radiant space heaters in the meantime to help keep the house warm.
Amy H.
Our furnace was acting up, or so we thought it was the furnace, and looked on this site to find a repair company. We (family, parents) have been burned before with bogus repairs, cleanings, unneeded sensors and didn't know who to trust. Collins H & C is a company we will deal with from now on. He answered promptly and came out the same day within 2 hours. He went down and looked at the furnace.

Within 10 minutes Mark knew exactly what was wrong. He didn't try to up sell a cleaning or sensors. It was our thermostat. We were still "old school" with a 20 year old dial one. He replaced our dial with a digital one. He explained why the dials are not that great, that we were paying more to Nipsco, etc and how this new one will work. Excellent company. Highly, highly recommend.
Haley Williamson
Quick. Very professional and reasonable pricing. I have had many contractors out at the house for our remodel and Collins was one of the few I actually felt comfortable and could trust. I thought I would need 2 new furnace units and he fixed them within the hour! Thank you!
Ken B.
Mark came out to figure out what was wrong with my furnace after I gave up trying to fix it myself. Glad to say after I now have heat. He was very quick to come out and explained the issue to me in detail and answered my questions(I'm kind of a techie so I like to understand how stuff works). He was affordable and a nice guy. Will definitely call him again if I have issues.
Stephanie Wuest
Our 30 year old furnace died on a cold Sunday morning. Collins answered our call on the first ring, came out promptly, got the furnace working again while we contemplated replacing it. When the furnace died again later that day, Collins came back with space heaters to borrow. We greatly appreciated the prompt and friendly service. We had a new furnace in two days.
Jodie Carter
Very satisfied customer here. Mark made us feel like we'd been friends for years. He's knowledgeable and provided excellent quality service. I highly recommend this company. I will continue to use them for any heating/cooling needs.
Marianne Lee
Mark was very professional and knowledgeable. He explained both the short term and long term fixes for our 21 year old furnace, without trying to sell us anything additional. We opted for a short term fix, and the repairs were done quickly and efficiently. I would highly recommend him to my friends.
Terry Graham
Very pleased. They were able to come sooner than other places I called, and arrived within the window of time promised. Friendly and knowledgeable. I was fortunate that I only needed an inexpensive part, and felt they were very honest. I will use them again if I have problems in the future, and would
Kathy N.
My heat went out on the coldest day of the year, I called several HVAC companies and Collins was the first back to me. Mark came out and fixed the problem right away and was very kind and explained everything to me. As far as the price, let me just say he saved Christmas for my family this year!!!
Angelica R.
Honest, Trustworthy and Professional service! I highly recommend Mark for any of your HVAC issues. You won't regret it! He brings that old fashioned feel to his service that is very hard to find these days. He explained everything regarding my home heating issues, in detail and he made me feel safe. If you have been looking for quality, honesty and great customer service....choose Collins! Very reasonable too!
Jessica Z.
I feel the service provided by Mark exceeded expectations. He really went above and beyond to service my furnace as promptly as possible
Elsa C.
I appreciated the prompt reply. Very nice job done. Mom is toastie. Very friendly will call again if we ever need work done. Will call Collins. Thank you for a job well done.☺
Perla L.
Completely and highly satisfied as always. That is the reason we have been your return customer for years. Collins means reliability, quality, and professionalism. Collins is the best!!!