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Find Air conditioning pros in San Lorenzo

Avatar for General Air Technology

General Air Technology

4.93(
7
)
Approved Pro

General Air Technology

4.93(
7
)
Approved Pro
Customers say: Quick response
5 years of experience
Free onsite estimate

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's 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 in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Junior was totally on top of things. Installers were on time, polite and very efficient. I was given 5 quotes from other companies but General Air Technology was BY FAR the lowest quote."

nadine D on January 2022

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's 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 in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Junior was totally on top of things. Installers were on time, polite and very efficient. I was given 5 quotes from other companies but General Air Technology was BY FAR the lowest quote."

nadine D on January 2022


Villalobos Hauling & Junk Removal-Unlicensed Contractor

5.00(
1
)
Approved Pro

Villalobos Hauling & Junk Removal-Unlicensed Contractor

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
10 years of experience

Villalobos Hauling & Junk Removal is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"Danny and his team fixed my entire home ! Thank you so much will definitely hired them again !"

Nelly M on November 2022

Villalobos Hauling & Junk Removal is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"Danny and his team fixed my entire home ! Thank you so much will definitely hired them again !"

Nelly M on November 2022


Avatar for Jorge Perez - Unlicensed Contractor

Jorge Perez - Unlicensed Contractor

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Jorge Perez - Unlicensed Contractor

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
7 years of experience
Free onsite estimate

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's 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 in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's 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 in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.


CA Heating and Air Conditioning

5.00(
9
)
Approved Pro

CA Heating and Air Conditioning

5.00(
9
)
Approved Pro
1 years of experience
Free onsite estimate

With 25 years of experience C.A Heating and Air Conditioning is a leader in providing our customers with the highest quality 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!

"Usvaldo Valencia "

Usvaldo V on August 2025

With 25 years of experience C.A Heating and Air Conditioning is a leader in providing our customers with the highest quality 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!

"Usvaldo Valencia "

Usvaldo V on August 2025


Lara's Home Improvement

4.40(
5
)
Approved Pro

Lara's Home Improvement

4.40(
5
)
Approved Pro
35 local quotes requested
5 years of experience

Specializing in Handyman work! We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out our services offered and call or click to schedule a free estimate today!

"Poor workmanship, substandard work."

Crawford C on January 2022

Specializing in Handyman work! We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out our services offered and call or click to schedule a free estimate today!

"Poor workmanship, substandard work."

Crawford C on January 2022


Avatar for Silicon Valley Air Experts-Unlicensed Contractor

Silicon Valley Air Experts-Unlicensed Contractor

4.91(
49
)
Approved Pro

Silicon Valley Air Experts-Unlicensed Contractor

4.91(
49
)
Approved Pro
Customers say: Quality work
66 local quotes requested
10 years of experience

With years of experience serving the area, we are your solution for all your home and office duct and vent cleaning 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. Check out our 5 star reviews from happy customers. Call us today! Satisfaction guaranteed!

"Excellent service and courteous professional explanations as to what needed to be done and why. I would highly recommend Matias and his crew for all your duct and vent cleaning needs. Silicon Valley Air Experts responded to my request and the job was done the same day!"

Linda m on June 2023

With years of experience serving the area, we are your solution for all your home and office duct and vent cleaning 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. Check out our 5 star reviews from happy customers. Call us today! Satisfaction guaranteed!

"Excellent service and courteous professional explanations as to what needed to be done and why. I would highly recommend Matias and his crew for all your duct and vent cleaning needs. Silicon Valley Air Experts responded to my request and the job was done the same day!"

Linda m on June 2023


Avatar for Perfect Star Heating and Air Conditioning

Perfect Star Heating and Air Conditioning

4.91(
252
)
Approved Pro

Perfect Star Heating and Air Conditioning

4.91(
252
)
Approved Pro
Super Service Award
Customers say: Quick response
879 local quotes requested
9 years of experience

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.

"Requested an estimate of a furnace replacement and he answered very quicky to my request. "

Claudio C on November 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.

"Requested an estimate of a furnace replacement and he answered very quicky to my request. "

Claudio C on November 2025


Avatar for Comfort Energy, Inc.

Comfort Energy, Inc.

4.63(
209
)
Approved Pro

Comfort Energy, Inc.

4.63(
209
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
161 local quotes requested

At COMFORT ENERGY, we are a full service team of licensed, highly trained and experienced professional installers and service technicians able to address every need of your commercial and residential heating and cooling needs. With more than 30 years of experience in the field, our staff is able to address everything from a simple service issue to complex integrated systems.

"They sent over a knowledgeable technician who was polite and professional. He was able to diagnose exactly what the problem was and fix it. "

Madhu V on June 2025

At COMFORT ENERGY, we are a full service team of licensed, highly trained and experienced professional installers and service technicians able to address every need of your commercial and residential heating and cooling needs. With more than 30 years of experience in the field, our staff is able to address everything from a simple service issue to complex integrated systems.

"They sent over a knowledgeable technician who was polite and professional. He was able to diagnose exactly what the problem was and fix it. "

Madhu V on June 2025


Avatar for VALLEY COMFORT HEATING AND AIR INC

VALLEY COMFORT HEATING AND AIR INC

5.00(
6
)
Approved Pro

VALLEY COMFORT HEATING AND AIR INC

5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
19 years of experience

Valley Comfort Heating and Air offers heating and air conditioning new unit sales, service, repair, and replacement services. In addition to repairs and installations, we provide tune-ups and air duct cleaning. We are a factory authorized dealer of Bryant heating and air conditioning units, the most trusted name in air conditioning and heating. We serve Sonoma, Napa and Marin Counties.

"Great job performed by Valley Comfort Heating in the installation of air conditioning unit. Timely and professional in all aspects of installation. Workers completed task according to time line and were polite and professional at all times;"

ken m on August 2020

Valley Comfort Heating and Air offers heating and air conditioning new unit sales, service, repair, and replacement services. In addition to repairs and installations, we provide tune-ups and air duct cleaning. We are a factory authorized dealer of Bryant heating and air conditioning units, the most trusted name in air conditioning and heating. We serve Sonoma, Napa and Marin Counties.

"Great job performed by Valley Comfort Heating in the installation of air conditioning unit. Timely and professional in all aspects of installation. Workers completed task according to time line and were polite and professional at all times;"

ken m on August 2020


"Very efficient. Found and fixed the issue quickly"

Carter H on July 2024

Air Concepts Mission Provide professional, trustworthy and responsive service to all of our valued customers.

"Very efficient. Found and fixed the issue quickly"

Carter H on July 2024

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Showing 1-10 of 1022

FAQs for air conditioning projects in San Lorenzo, CA

You can identify your system's refrigerant type by examining the data plate or label often located on the outdoor condensing unit. Look for "R-22" or "HCFC-22" in the specifications. 

Manufacturing date provides another clue—systems produced before 2010 often use R-22, while newer units utilize alternative refrigerants. If the label is missing or unclear, a qualified HVAC technician can determine your refrigerant type during a service inspection.

Federal regulations prohibit the purchase and handling of R-22 refrigerant without proper EPA certification. These restrictions exist because R-22 contributes to ozone depletion when released into the atmosphere and requires specialized handling procedures. 

Additionally, improper refrigerant charging can damage your system and create safety hazards. Professional technicians have the training, equipment, and legal authorization to properly diagnose, repair, and recharge your system.

Air conditioning systems require approximately two to four pounds of R-22 per ton of cooling capacity, with three pounds per ton being the average. For example, a 3-ton system needs about nine pounds of refrigerant for a complete charge. However, the exact amount varies by manufacturer, model, and system configuration. A professional technician will determine the precise charge required for your specific equipment.

While technically possible to retrofit some R-22 systems to use alternative refrigerants, these conversions require substantial modifications to system components and are rarely cost-effective. The compressor, expansion valve, and sometimes the entire coil system would need replacement or adaptation. Most homeowners find that investing in a complete system upgrade provides better long-term value and performance than attempting conversion of aging equipment.

Though new production of R-22 ended in 2020, reclaimed and recycled supplies remain available but are steadily decreasing. The EPA's final phaseout deadline extends to 2030, but practical availability may become severely limited well before that date. As supplies continue to diminish, expect prices to rise accordingly. Homeowners with R-22 systems should begin planning for eventual system replacement as part of their long-term home maintenance strategy.

The San Lorenzo, CA homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.