O'Boys Plumbing, Heating & Air is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. O'Boys Plumbing, Heating & Air is a leader in providing our customers with the highest quality products and service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!
"Excellent install, follow up and great service!"
Katie S on February 2024
O'Boys Plumbing, Heating & Air is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. O'Boys Plumbing, Heating & Air is a leader in providing our customers with the highest quality products and service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!
"Excellent install, follow up and great service!"
Katie S on February 2024
With over 7 years of experience serving the Plymouth area, Don Heating and Cooling is your solution for all your Hvac needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Call us today! Satisfaction guaranteed.
"very good work and customer service"
Frederick W on September 2021
With over 7 years of experience serving the Plymouth area, Don Heating and Cooling is your solution for all your Hvac needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Call us today! Satisfaction guaranteed.
"very good work and customer service"
Frederick W on September 2021
Hoffman Heating has 60 years of experience in the industry providing each and every one of our clients with a strong combination of top quality products and timely execution. We get the HVAC job done right the first time, every time. Deal directly with the owners. We go beyond the call of duty to ensure your happiness with the result of the HVAC job. So when you are looking for the best, don't settle for less. Call on the experts here at Hoffman Refrigeration and Heating. We offer 24-hour emergency service
"Great customer service "
Arin K on June 2025
Hoffman Heating has 60 years of experience in the industry providing each and every one of our clients with a strong combination of top quality products and timely execution. We get the HVAC job done right the first time, every time. Deal directly with the owners. We go beyond the call of duty to ensure your happiness with the result of the HVAC job. So when you are looking for the best, don't settle for less. Call on the experts here at Hoffman Refrigeration and Heating. We offer 24-hour emergency service
"Great customer service "
Arin K on June 2025
We are dedicated to providing our clients with the very best in service, installation, and repair for all of your heating and cooling needs. We specialize in a variety of residential and commercial projects to include oil service contracts, oil tank replacement, and we are the only company in the area specializing in pump valve services. We take pride in the attention to detail put into each of the projects we are involved with. We look forward to building long-term relationships with our clients, and guarantee your satisfaction. Please contact us for a free in-home evaluation and estimate.
"I will use them again!"
eric b on March 2025
We are dedicated to providing our clients with the very best in service, installation, and repair for all of your heating and cooling needs. We specialize in a variety of residential and commercial projects to include oil service contracts, oil tank replacement, and we are the only company in the area specializing in pump valve services. We take pride in the attention to detail put into each of the projects we are involved with. We look forward to building long-term relationships with our clients, and guarantee your satisfaction. Please contact us for a free in-home evaluation and estimate.
"I will use them again!"
eric b on March 2025
You deserve a safe and reliable home. Get the job done right the first time with outstanding customer service from the Twin Cities top rated electrician. Outlets, fans, lighting, smoke detectors, switches, and service panels. Your full service electrician.
"Very pleasant to work with. Did a great job. "
Guy N on June 2025
You deserve a safe and reliable home. Get the job done right the first time with outstanding customer service from the Twin Cities top rated electrician. Outlets, fans, lighting, smoke detectors, switches, and service panels. Your full service electrician.
"Very pleasant to work with. Did a great job. "
Guy N on June 2025
Plugz is your local electrical company providing five-star service at an affordable price. Whether you're looking to upgrade your electrical panel, complete a whole-home rewire or, maybe you have an outlet that is giving you trouble, give Plugz Electric a call today. We have financing options available to help you with larger repairs that you may not have planned for. Regardless of the situation, we're here for you, 24/7.
"Very helpful."
Eric S on February 2025
Plugz is your local electrical company providing five-star service at an affordable price. Whether you're looking to upgrade your electrical panel, complete a whole-home rewire or, maybe you have an outlet that is giving you trouble, give Plugz Electric a call today. We have financing options available to help you with larger repairs that you may not have planned for. Regardless of the situation, we're here for you, 24/7.
"Very helpful."
Eric S on February 2025
Providing quality service for the past 22 years, Aire Serv is your single source for heating and air conditioning. We look forward to helping you!
"Our A/C went out and Aire Serv was quick to schedule and identify the problem that required us to replace the unit. They came back the very next day for the install and did great work! They even re-routed some of our pipes for easier access rather than leaving them where they were. It seemed a bit expensive to me at first, but worth it for the quality and service in the long run."
Ryan L on July 2023
Providing quality service for the past 22 years, Aire Serv is your single source for heating and air conditioning. We look forward to helping you!
"Our A/C went out and Aire Serv was quick to schedule and identify the problem that required us to replace the unit. They came back the very next day for the install and did great work! They even re-routed some of our pipes for easier access rather than leaving them where they were. It seemed a bit expensive to me at first, but worth it for the quality and service in the long run."
Ryan L on July 2023
AMi Home Services proudly marks 40 years of delivering top tier Heating, Cooling, Plumbing, Electrical, Duct Repair, Water Treatment, and Duct Cleaning services across the Twin Cities Metro. Serving both Residential and Commercial clients, we prioritize integrity, expertise, and professionalism. We take great pride in our experience, quality and customer service that we provide to meet your needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer a professional manner. When you choose to partner with AMi, you're choosing a company that does things the right way, not the easy way.
"These folks replaced my furnace and installed a central air conditioning system at the same time. The intial contact, work estimate, and scheduling was easy for me to do and the manner in which I was treated was first class professional and very courteous. The crew who did the work (Brant B., Brad, Melissa) was top notch, worked diligently, produced a high quality installation, and completed the work in seven hours. It was an amazingly good experience for me and I high recommend Air Mechanical!"
Thomas D on November 2023
AMi Home Services proudly marks 40 years of delivering top tier Heating, Cooling, Plumbing, Electrical, Duct Repair, Water Treatment, and Duct Cleaning services across the Twin Cities Metro. Serving both Residential and Commercial clients, we prioritize integrity, expertise, and professionalism. We take great pride in our experience, quality and customer service that we provide to meet your needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer a professional manner. When you choose to partner with AMi, you're choosing a company that does things the right way, not the easy way.
"These folks replaced my furnace and installed a central air conditioning system at the same time. The intial contact, work estimate, and scheduling was easy for me to do and the manner in which I was treated was first class professional and very courteous. The crew who did the work (Brant B., Brad, Melissa) was top notch, worked diligently, produced a high quality installation, and completed the work in seven hours. It was an amazingly good experience for me and I high recommend Air Mechanical!"
Thomas D on November 2023
Air Comfort Heating & Air Conditioning, Inc. a family owned business proudly serving the north metro area with quality and friendly service since 2002. We are a full service heating and air conditioning contractor who is licensed, bonded, and insured. We provide free no obligation estimates and are available 24 hours a day for emergency services on all brands. An authorized Trane Comfort Specialist dealer who is N.A.T.E. certified, a member of the BBB with an A+ rating and an Angie’s List Super Service Award recipient. Financing is available plus Visa, Master Card, Discover and personal checks are accepted for payment. Other services we provide: Rotobrush Duct Cleaning, Maintenance Agreements, live operator for your after hour emergencies. We guarantee 100% satisfaction and look forward to building a lifelong relationship with you. Mission Statement: Air Comfort’s constant focus is 100% satisfaction. We accomplish this by providing premium quality products by highly trained professionals. We will continue to develop lasting relationships with our customers by the commitment and integrity of our people.
"Scope of work needed was expertly analyzed and explained, including selection of the optimal equipment. New equipment appears seamlessly installed, works great. Old equipment hauled away, area left tidy. Pricing and financing are competitive. Highly recommended."
Brian M on October 2020
Air Comfort Heating & Air Conditioning, Inc. a family owned business proudly serving the north metro area with quality and friendly service since 2002. We are a full service heating and air conditioning contractor who is licensed, bonded, and insured. We provide free no obligation estimates and are available 24 hours a day for emergency services on all brands. An authorized Trane Comfort Specialist dealer who is N.A.T.E. certified, a member of the BBB with an A+ rating and an Angie’s List Super Service Award recipient. Financing is available plus Visa, Master Card, Discover and personal checks are accepted for payment. Other services we provide: Rotobrush Duct Cleaning, Maintenance Agreements, live operator for your after hour emergencies. We guarantee 100% satisfaction and look forward to building a lifelong relationship with you. Mission Statement: Air Comfort’s constant focus is 100% satisfaction. We accomplish this by providing premium quality products by highly trained professionals. We will continue to develop lasting relationships with our customers by the commitment and integrity of our people.
"Scope of work needed was expertly analyzed and explained, including selection of the optimal equipment. New equipment appears seamlessly installed, works great. Old equipment hauled away, area left tidy. Pricing and financing are competitive. Highly recommended."
Brian M on October 2020
Hoffman Cooling & Heating is a full-service Minneapolis and St. Paul heating and air conditioning company known for their lightning-fast service, professionalism, and efficiency..... however, we do not service boilers. We are still family owned and operated, most of our competitors have been purchased by investment companies. We have been proudly serving the twin cities since 1947, we strive to deliver the best customer experience possible with our fast, friendly and honest service!!! We offer 24/7 service 365 days a year!! We know what it takes to get the job done and to do it well. We have tenured, honest professionals working with our customers delivering fast and friendly service....read our Google reviews!! You may also see our billboards all over the twin cities, just look for the orange & teal offers!!! Call us today and I guarantee you won't go wrong.
"Wonderful! Very professional, answered my questions and got the work done in a timely manner. Courteous, helpful and local. Hoffman Cooling & Heating was a familiar name for me and I was pleased at the great job they did! I’d recommend them!"
judy o on January 2025
Hoffman Cooling & Heating is a full-service Minneapolis and St. Paul heating and air conditioning company known for their lightning-fast service, professionalism, and efficiency..... however, we do not service boilers. We are still family owned and operated, most of our competitors have been purchased by investment companies. We have been proudly serving the twin cities since 1947, we strive to deliver the best customer experience possible with our fast, friendly and honest service!!! We offer 24/7 service 365 days a year!! We know what it takes to get the job done and to do it well. We have tenured, honest professionals working with our customers delivering fast and friendly service....read our Google reviews!! You may also see our billboards all over the twin cities, just look for the orange & teal offers!!! Call us today and I guarantee you won't go wrong.
"Wonderful! Very professional, answered my questions and got the work done in a timely manner. Courteous, helpful and local. Hoffman Cooling & Heating was a familiar name for me and I was pleased at the great job they did! I’d recommend them!"
judy o on January 2025
Consider replacing your gravity furnace when it's over 30 years old, when you experience frequent system failures, or when your heating bills continue rising despite maintenance. Many older gravity systems operate at substantially lower efficiency rates compared to modern alternatives, often 50% to 60% versus the 80% to 98% efficiency of contemporary furnaces.
Replacement also makes sense when your existing system shows signs of deterioration that could affect safety or when professional inspection reveals significant issues.
Most gravity furnace replacements require between six and 12 hours of professional labor, spanning one to two working days, depending on scheduling and complexity. Basic installations with minimal complications may be completed in a single day, while projects requiring extensive ductwork modifications or asbestos remediation will require additional time.
The timeline includes removal of the old system, preparation of the installation area, placement and connection of the new furnace, and thorough testing.
Watch for warning signs, including inconsistent heating throughout your home, unusual noises during operation, visible corrosion or damage to the heat exchanger, and steadily increasing energy consumption. If your furnace requires frequent repairs or if you notice a yellow or flickering pilot light instead of a steady blue flame, these may indicate serious issues.
Age remains a primary consideration—systems over 30 years old warrant replacement rather than continued repair.
Well-maintained gravity furnaces that pass professional safety inspections can continue operating, but they inherently carry more risk factors than modern systems. Potential concerns include less efficient combustion that may produce carbon monoxide, deteriorating components that could create fire hazards, and the possible presence of asbestos in insulation materials.
Modern furnaces incorporate numerous safety improvements, including automatic shutdown features, sealed combustion chambers, and electronic ignition systems that eliminate standing pilot lights.