Top Knoch! They were able to fix our problem the same day we called. Scott was wonderful! He explained what he was doing and his knowledge was impressive. Thanks so much!

Steph N


Excellent service and fair priced. Friendly and prompt. Highly recommend.

Craig W


Thank you, Scott, for your excellent service! You were very knowledgeable and friendly. Will definitely recommend A-1 Heating & Air!

Tara Damion M


Classic 100 degree weather and the ac quits working! Scott was over on a Saturday within an hour and had it working. I also appreciate that Scott talked me through what he was doing, throwing out specs and explaining the entire system - very knowledgeable. Very satisfied with the service call.

Lucas and Amy A


Very good customer service and reasonable price. Derek did good with the installation of our gas line from the mechanical room to the underground riser for the fire pit. He knows what he is doing so we would want him to connect the fire pit kit to the line after our fire pit blocks are assembled.



I have been dealing with furnace issues for the last year and a half. Dealt with 2 other heating companies in Bismarck and none of them were able to help resolve the problems. A-1 came and still was unable to resolve the problem but Derek the technician was at least able to explain what all was going on. He referred me to what might be the main cause of the furnace problem which no other heating company in Bismarck was able to do. So thank you Derek and thank you A-1!



Outstanding company with exceptional customer service. Dustin and his team are the best in the business for our city!



Thank you for the superior service and in the most timely manner!!! Adam saved the day during the 90+ degree summer day. Highly recommended.



Had you guys come out to look at our ac. It wasn't working properly. Your tech was super nice, he swapped the part and now it's working nice. Thanks for saving our ancient unit :)



Very quick to get scheduled in and professional during the covid-19 issues. Installer went above & beyond to call and see what door to use for least exposure/contact & very polite. I Would definitely recommend a-1 heating!!!!!