With over 30 years of experience, Perfect Star Heating, Cooling, & Electrical is a locally owned and operated family business serving Alameda & Contra Costa County. We service all makes and models, offering top-quality comfort and energy efficiency solutions. Specializing in Furnace/Heating, Air Conditioning, and Ductless Mini-Split installation, we also provide repair and maintenance for Central HVAC systems, Ductwork, Indoor Air Quality, Electrical Repair & Installation, and Solar Installation. Free estimates are available for HVAC system replacement, new installations, and solar solutions. As a Lennox Premier Dealer, Daikin Comfort Pro, and WellAir Elite dealer, we are Diamond Certified, hold an A+ BBB Rating, and have been voted “The Best Heating & Air Company” and “The Most Community-Minded Company” by The Press in Brentwood, CA for two years. We are also SFGATE’s Best of the Bay Area Heating & A/C Service provider.
"5 star service!!! A crew of 3 arrived, Brandon H, Nestor C and Anthony A. They did an excellent job and very hard workers. I am thrilled with their professionalism, hot tips and work ethic. Will definitely recommend them!! Thank you again!!!"
Lisa V on May 2025
With over 30 years of experience, Perfect Star Heating, Cooling, & Electrical is a locally owned and operated family business serving Alameda & Contra Costa County. We service all makes and models, offering top-quality comfort and energy efficiency solutions. Specializing in Furnace/Heating, Air Conditioning, and Ductless Mini-Split installation, we also provide repair and maintenance for Central HVAC systems, Ductwork, Indoor Air Quality, Electrical Repair & Installation, and Solar Installation. Free estimates are available for HVAC system replacement, new installations, and solar solutions. As a Lennox Premier Dealer, Daikin Comfort Pro, and WellAir Elite dealer, we are Diamond Certified, hold an A+ BBB Rating, and have been voted “The Best Heating & Air Company” and “The Most Community-Minded Company” by The Press in Brentwood, CA for two years. We are also SFGATE’s Best of the Bay Area Heating & A/C Service provider.
"5 star service!!! A crew of 3 arrived, Brandon H, Nestor C and Anthony A. They did an excellent job and very hard workers. I am thrilled with their professionalism, hot tips and work ethic. Will definitely recommend them!! Thank you again!!!"
Lisa V on May 2025
At MDP, we pride ourselves on our commitment to transparency, affordability, and exceptional customer service. Our certified technicians ensure every project is completed with the utmost professionalism and care, keeping your comfort and satisfaction as our top priorities. 📞 Contact us at (669) 400-6792 📧 Email: accounting@mdphvac.com 💻 Website: https://mdpheatingcooling.com/ 📜 California License #1103720. Our services include: ✅ Furnace and heat pump diagnostics and repairs ✅ Duct cleaning ✅ Expert HVAC system installation and maintenance ✅ Thermostat installation and optimization ✅ Free second opinions on previous HVAC estimates
"Project done."
Perry C on May 2025
At MDP, we pride ourselves on our commitment to transparency, affordability, and exceptional customer service. Our certified technicians ensure every project is completed with the utmost professionalism and care, keeping your comfort and satisfaction as our top priorities. 📞 Contact us at (669) 400-6792 📧 Email: accounting@mdphvac.com 💻 Website: https://mdpheatingcooling.com/ 📜 California License #1103720. Our services include: ✅ Furnace and heat pump diagnostics and repairs ✅ Duct cleaning ✅ Expert HVAC system installation and maintenance ✅ Thermostat installation and optimization ✅ Free second opinions on previous HVAC estimates
"Project done."
Perry C on May 2025
At Bell Brothers, our number priority to keep our customer, employees, and their families safe. As we continue to closely monitor the coronavirus situation, we want you to know that we have taken steps to ensure we are serving you in the safest way possible. As a precautionary measure, to ensure we are doing everything we can to ensure a safe and healthy work environment, we have implemented increased hygiene routines. This includes increased cleaning and sanitizing of all offices and high contact areas. All technicians will be taking precautionary measures such as: -Wearing gloves -Limiting contact such as handshaking -Hand washing and sanitizing before and after each customer visit -Wearing a mask on their face We will be doing everything we can to keep you and our technicians safe. Thank you for your trust in Bell Brothers. We remain committed to safely serving you.
"sometimes it takes time to complete the work"
Jayant S on August 2024
At Bell Brothers, our number priority to keep our customer, employees, and their families safe. As we continue to closely monitor the coronavirus situation, we want you to know that we have taken steps to ensure we are serving you in the safest way possible. As a precautionary measure, to ensure we are doing everything we can to ensure a safe and healthy work environment, we have implemented increased hygiene routines. This includes increased cleaning and sanitizing of all offices and high contact areas. All technicians will be taking precautionary measures such as: -Wearing gloves -Limiting contact such as handshaking -Hand washing and sanitizing before and after each customer visit -Wearing a mask on their face We will be doing everything we can to keep you and our technicians safe. Thank you for your trust in Bell Brothers. We remain committed to safely serving you.
"sometimes it takes time to complete the work"
Jayant S on August 2024
Look no further than Aire Serv® when you need high-quality Santa Clara County, CA, heating and air conditioning services. We have been providing top-tier HVAC services throughout North America since 1992. At Aire Serv of Campbell & Saratoga, our HVAC experts pride themselves on consistently delivering outstanding service to all our commercial and residential customers. Of course, heating and cooling best practices have evolved over time, and Campbell & Saratoga HVAC services must reflect those changes. Our service professionals have the knowledge and experience necessary to maintain and repair modern and older units alike. Regardless of whether your heating unit is malfunctioning or you’re in the market for a new system altogether, our Campbell & Saratoga heating service experts are ready to help. And when temperatures climb, you can count on our Campbell & Saratoga air conditioning service professionals to bring their expertise to your home or business.
"I recently had a new HVAC system installed by Aireserv, and I couldn't be more pleased with the results. From the beginning, the team was professional, courteous, and informative. They arrived on time and were very thorough in explaining the detailed installation plan, the features of the new system, and how to operate it. The installation went smoothly, and the technicians cleaned the area while working. Once the system was installed, they ran tests to ensure everything was working perfectly and took the time to answer all of my questions. The new HVAC system has been a game-changer in terms of performance. It heats and cools my home more efficiently than my previous unit, and I've noticed a significant improvement in comfort and air quality. The system runs quietly and maintains an even temperature throughout my home. I also appreciate the energy savings I'm already seeing. My energy bills have been noticeably lower, which I can directly attribute to the new system's efficiency."
Azam M on January 2025
Look no further than Aire Serv® when you need high-quality Santa Clara County, CA, heating and air conditioning services. We have been providing top-tier HVAC services throughout North America since 1992. At Aire Serv of Campbell & Saratoga, our HVAC experts pride themselves on consistently delivering outstanding service to all our commercial and residential customers. Of course, heating and cooling best practices have evolved over time, and Campbell & Saratoga HVAC services must reflect those changes. Our service professionals have the knowledge and experience necessary to maintain and repair modern and older units alike. Regardless of whether your heating unit is malfunctioning or you’re in the market for a new system altogether, our Campbell & Saratoga heating service experts are ready to help. And when temperatures climb, you can count on our Campbell & Saratoga air conditioning service professionals to bring their expertise to your home or business.
"I recently had a new HVAC system installed by Aireserv, and I couldn't be more pleased with the results. From the beginning, the team was professional, courteous, and informative. They arrived on time and were very thorough in explaining the detailed installation plan, the features of the new system, and how to operate it. The installation went smoothly, and the technicians cleaned the area while working. Once the system was installed, they ran tests to ensure everything was working perfectly and took the time to answer all of my questions. The new HVAC system has been a game-changer in terms of performance. It heats and cools my home more efficiently than my previous unit, and I've noticed a significant improvement in comfort and air quality. The system runs quietly and maintains an even temperature throughout my home. I also appreciate the energy savings I'm already seeing. My energy bills have been noticeably lower, which I can directly attribute to the new system's efficiency."
Azam M on January 2025
We specialize in all phases of heating and cooling services, installs, repairs, maintenance, and more. We pride ourselves on the quality work we provide, while delivering great customer service. Check out all the services we offer below and call -or- click to schedule a free estimate today!
"Service was great. We had to replace the upstairs ac unit. I heard of his awesome reputation as hvac from a friend. Gave him a call, he came as soon as possible,replaced what needed to be fix. Next you know I'm chilling inside my house with ac blasting cool air. Thanks for your services."
Jerry n on August 2024
We specialize in all phases of heating and cooling services, installs, repairs, maintenance, and more. We pride ourselves on the quality work we provide, while delivering great customer service. Check out all the services we offer below and call -or- click to schedule a free estimate today!
"Service was great. We had to replace the upstairs ac unit. I heard of his awesome reputation as hvac from a friend. Gave him a call, he came as soon as possible,replaced what needed to be fix. Next you know I'm chilling inside my house with ac blasting cool air. Thanks for your services."
Jerry n on August 2024
Welcome to JZ HVAC Contractor, JZ HVAC Contractor has established itself as a trusted provider of heating, ventilation, and air conditioning solutions in the Bay Area, California. Our experienced team is committed to delivering top-notch services, including installation, repair, and maintenance for both residential and commercial clients. At JZ HVAC Contractor, we pride ourselves on our expertise, reliability, and customer satisfaction, ensuring your indoor environment is comfortable and energy-efficient all year round. Whether you need a quick repair or a comprehensive HVAC system upgrade, you can count on JZ HVAC CONTRACTOR to meet all your heating and cooling needs.
"Joy did excellent work: removed my old ducts and replaced them and added additional vents. He communicated well and was friendly and helpful. I highly recommend him!"
Kelly H on October 2024
Welcome to JZ HVAC Contractor, JZ HVAC Contractor has established itself as a trusted provider of heating, ventilation, and air conditioning solutions in the Bay Area, California. Our experienced team is committed to delivering top-notch services, including installation, repair, and maintenance for both residential and commercial clients. At JZ HVAC Contractor, we pride ourselves on our expertise, reliability, and customer satisfaction, ensuring your indoor environment is comfortable and energy-efficient all year round. Whether you need a quick repair or a comprehensive HVAC system upgrade, you can count on JZ HVAC CONTRACTOR to meet all your heating and cooling needs.
"Joy did excellent work: removed my old ducts and replaced them and added additional vents. He communicated well and was friendly and helpful. I highly recommend him!"
Kelly H on October 2024
Message from the Owner/ Founder: “As a third generation heating and air technician and retired 20 year veteran of fire and public safety, I wanted to create a service company that you could count on for its integrity and professionalism. When our service technicians arrive at your home, we want you to feel the same level of confidence and trust you get from a firefighter arriving at your home to help when you call 911. Our service technicians are professional, courteous, and well trained. I am comfortable allowing them into the homes of my families and friends who are firefighters, police officers and the public. Thank you for the opportunity to service your comfort needs and believing in our company. We look forward to a continued long relationship. Warm regards, Harry Abbott” Comfort Energy Inc is a full service provider of quality air conditioning and heating repair and installation. . Locally owned and operated, with over 30 years of experience. We are proud members of the Nexstar network of contractors. We specialize in helping homeowners make informed decisions to best meet your family's comfort needs. Spanish and Japanese spoken.
"We had a wonderful experience with Comfort Energy! The service person, whose name was Chance, did a thorough evaluation of the problem with a focus on saving us as much money as possible, to either repair or replace our 30-year-old heat furnace. He quickly determined that our inlet filter was too dense (it was a Merv 11 and should have been a Merv 8) and that that was probably causing the heater to go off an on every 5-10 minutes. He then tested and confirmed his hypothesis. He also performed a CO test to make sure there wasn't anything more serious going on. Finally, he gave us a good idea of replacement options, which we should probably do before the next Winter, but not necessarily right away. All in all, this is exactly the kind of assessment we needed, and it cost orders of magnitude less than what was estimated by the first service company we had come out. Chance was great, and Comfort Energy is our go-to for heating and cooling service and/or installation from now on."
Gary S on April 2025
Message from the Owner/ Founder: “As a third generation heating and air technician and retired 20 year veteran of fire and public safety, I wanted to create a service company that you could count on for its integrity and professionalism. When our service technicians arrive at your home, we want you to feel the same level of confidence and trust you get from a firefighter arriving at your home to help when you call 911. Our service technicians are professional, courteous, and well trained. I am comfortable allowing them into the homes of my families and friends who are firefighters, police officers and the public. Thank you for the opportunity to service your comfort needs and believing in our company. We look forward to a continued long relationship. Warm regards, Harry Abbott” Comfort Energy Inc is a full service provider of quality air conditioning and heating repair and installation. . Locally owned and operated, with over 30 years of experience. We are proud members of the Nexstar network of contractors. We specialize in helping homeowners make informed decisions to best meet your family's comfort needs. Spanish and Japanese spoken.
"We had a wonderful experience with Comfort Energy! The service person, whose name was Chance, did a thorough evaluation of the problem with a focus on saving us as much money as possible, to either repair or replace our 30-year-old heat furnace. He quickly determined that our inlet filter was too dense (it was a Merv 11 and should have been a Merv 8) and that that was probably causing the heater to go off an on every 5-10 minutes. He then tested and confirmed his hypothesis. He also performed a CO test to make sure there wasn't anything more serious going on. Finally, he gave us a good idea of replacement options, which we should probably do before the next Winter, but not necessarily right away. All in all, this is exactly the kind of assessment we needed, and it cost orders of magnitude less than what was estimated by the first service company we had come out. Chance was great, and Comfort Energy is our go-to for heating and cooling service and/or installation from now on."
Gary S on April 2025
We are locally owned and operated, and serving the Bay Area. Our focus is residential air conditioning, heating, Installation of HVAC systems and full-service plumbing. We love working with homeowners and helping to take care of their precious homes. We also keep busy doing light commercial service. Serving California since 1954, financing options available, We don't charge extra for Saturday service calls.
"Called this company for their $77 dollar, which they advertised with a flyer, for a tune-up and cleaning for my heating system. They are a Hayward company and I was told that our Castro Valley home was not in their service area. I bet if I called to buy a new heater they would be out in a day."
Gregory O on March 2023
We are locally owned and operated, and serving the Bay Area. Our focus is residential air conditioning, heating, Installation of HVAC systems and full-service plumbing. We love working with homeowners and helping to take care of their precious homes. We also keep busy doing light commercial service. Serving California since 1954, financing options available, We don't charge extra for Saturday service calls.
"Called this company for their $77 dollar, which they advertised with a flyer, for a tune-up and cleaning for my heating system. They are a Hayward company and I was told that our Castro Valley home was not in their service area. I bet if I called to buy a new heater they would be out in a day."
Gregory O on March 2023
Dukes Heating & Air Conditioning is in HVAC business for 37 years now and continuously remains on the top of the industry. We do this by providing honesty and good workmanship that our customers love the most. We- Dukes Heating & Air Conditioning , also make sure that we have the latest technology that enables us to be more competitive & expert in the field and stand behind any work we have performed. Our in-house employees are all professionally trained and deliver only excellence to whatever project they work on.
"Great service"
Noah H on October 2023
Dukes Heating & Air Conditioning is in HVAC business for 37 years now and continuously remains on the top of the industry. We do this by providing honesty and good workmanship that our customers love the most. We- Dukes Heating & Air Conditioning , also make sure that we have the latest technology that enables us to be more competitive & expert in the field and stand behind any work we have performed. Our in-house employees are all professionally trained and deliver only excellence to whatever project they work on.
"Great service"
Noah H on October 2023
Albert Nahman Services was founded in 1981 and has been serving Berkeley, CA and it surrounding areas in all their plumbing and HVAC needs. Each of our technicians went through rigorous training so we can guarantee that you will be receiving the proper service. We are also insured and supply a warranty for our parts for five years and up to twenty years on an re-piping or sewer replacement. Call us now to make your appointment!
"It was fine but to expensive sorry Ivan’s affort that much"
Rene T on May 2025
Albert Nahman Services was founded in 1981 and has been serving Berkeley, CA and it surrounding areas in all their plumbing and HVAC needs. Each of our technicians went through rigorous training so we can guarantee that you will be receiving the proper service. We are also insured and supply a warranty for our parts for five years and up to twenty years on an re-piping or sewer replacement. Call us now to make your appointment!
"It was fine but to expensive sorry Ivan’s affort that much"
Rene T on May 2025
Most standard ductwork rerouting projects require between one and three days for completion, though complex installations may extend to a week. Factors affecting the timeline include accessibility of work areas, whether walls need opening, and the discovery of unexpected issues like asbestos or mold.
Projects involving multiple rooms or requiring extensive modifications naturally take longer. Scheduling during moderate weather seasons minimizes comfort disruptions while your system is temporarily offline.
Properly redesigned ductwork can significantly improve energy efficiency in many homes. Inefficient duct layouts may waste 20% to 30% of conditioned air through excessive length, leaky connections, or poor insulation.
Professional rerouting creates more direct airflow paths, eliminates leakage points, and often includes improved insulation. These enhancements allow your HVAC system to operate more efficiently, potentially reducing energy consumption while improving overall comfort throughout your home.
If you suspect asbestos in your ductwork or surrounding materials, immediately stop any work and contact a certified asbestos inspector. Asbestos testing services cost between $250 and $700 to confirm the presence of this hazardous material. Professional removal, if necessary, ranges from $700 to $2,200 depending on the affected area. Never attempt to remove or disturb potential asbestos materials yourself, as improper handling creates serious health risks through airborne fiber release.
Permit requirements for ductwork modifications vary by location. Many municipalities require permits for significant HVAC system changes, especially those involving structural modifications. Consulting your local building department before beginning work ensures compliance with regulations.
Working without required permits can lead to complications, including potential fines, insurance coverage issues, and disclosure requirements when selling your property. Professional HVAC contractors can handle permit applications as part of their service.