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Jim's Air Systems

4.38(
8
)
Approved Pro

Jim's Air Systems

4.38(
8
)
Approved Pro
142 local quotes requested
47 years of experience

We are a family owned and operated Heating and Air conditioning and solar contractor in the Bay Area for the past 40 years. We specialize in Residential, Commercial, and New Construction installation. We pride ourselves in quality workmanship and fast reliable service at a fair price. We will not price gouge you like the big companies do. Call us for a free estimate, ask for Josh. 925-584-2634

"Josh got on this very quick and quoted the best price with good brand day and night carry"

Jianyu D on November 2024

We are a family owned and operated Heating and Air conditioning and solar contractor in the Bay Area for the past 40 years. We specialize in Residential, Commercial, and New Construction installation. We pride ourselves in quality workmanship and fast reliable service at a fair price. We will not price gouge you like the big companies do. Call us for a free estimate, ask for Josh. 925-584-2634

"Josh got on this very quick and quoted the best price with good brand day and night carry"

Jianyu D on November 2024


Avatar for Comfort Energy Inc

Comfort Energy Inc

1465 N Milpitas Blvd
4.60(
116
)
Approved Pro

Comfort Energy Inc

1465 N Milpitas Blvd
4.60(
116
)
Approved Pro
Customers say: Quick response
153 local quotes requested
22 years of experience

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


Avatar for Service Champions Heating & Air Conditioning

Service Champions Heating & Air Conditioning

4430 Yankee Hill Rd
4.64(
655
)
Approved Pro

Service Champions Heating & Air Conditioning

4430 Yankee Hill Rd
4.64(
655
)
Approved Pro
Customers say: Super punctual
433 local quotes requested
22 years of experience

Service Champions is the leading heating and air conditioning contractor in Northern California servicing homeowners in East Bay, South Bay and Sacramento areas. We can make your home more comfortable and improve the quality of air you and your family breathe. We specialize in maintenance, repair and sales of all brands of air conditioners and heaters, and are experts in indoor air quality improvement through filtration, duct replacement, insulation and hospital grade UV lights. All the air conditioners we install have the new environmentally friendly refrigerant that does not damage the ozone. We also are huge proponents of super high efficient equipment, such as 95% efficient furnaces. This equipment saves homeowners a tremendous amount of money on their utility bills.

"Our Service Tech, Alex Peck, arrived on time to perform the annual check up & tune-up of our HVAC System. He was very professional and following the Tune-Up asked if there was any other items that needed done or looked into that he could take care of. His services were very much appreciated and very professional. Lee"

Lain L on September 2025

Service Champions is the leading heating and air conditioning contractor in Northern California servicing homeowners in East Bay, South Bay and Sacramento areas. We can make your home more comfortable and improve the quality of air you and your family breathe. We specialize in maintenance, repair and sales of all brands of air conditioners and heaters, and are experts in indoor air quality improvement through filtration, duct replacement, insulation and hospital grade UV lights. All the air conditioners we install have the new environmentally friendly refrigerant that does not damage the ozone. We also are huge proponents of super high efficient equipment, such as 95% efficient furnaces. This equipment saves homeowners a tremendous amount of money on their utility bills.

"Our Service Tech, Alex Peck, arrived on time to perform the annual check up & tune-up of our HVAC System. He was very professional and following the Tune-Up asked if there was any other items that needed done or looked into that he could take care of. His services were very much appreciated and very professional. Lee"

Lain L on September 2025


Avatar for The Tankless Guys Plumbing Corp.

The Tankless Guys Plumbing Corp.

Based Out Of
5.00(
5
)
Approved Pro

The Tankless Guys Plumbing Corp.

Based Out Of
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
199 local quotes requested

We offer a variety of plumbing services. We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality of work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule an estimate today!

"The work was excellent, very cleanly done, great knowledge and helpful information from Gert, the owner of company. Good communication from company. Would work with this business again."

Lois T on July 2024

We offer a variety of plumbing services. We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality of work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule an estimate today!

"The work was excellent, very cleanly done, great knowledge and helpful information from Gert, the owner of company. Good communication from company. Would work with this business again."

Lois T on July 2024


"Jim Sozzi was AMAZING. We needed urgent help with a toilet and he took care of us and helped uncover a few other matters that he also fixed. We're planning to hire him for future work. Would strongly recommend."

Mitch A on December 2023

We are your trusted, local plumber in SF dedicated to providing every customer with the highest quality, seamless experience when it comes to plumbing, water heater and sewer repairs, installations and service.

"Jim Sozzi was AMAZING. We needed urgent help with a toilet and he took care of us and helped uncover a few other matters that he also fixed. We're planning to hire him for future work. Would strongly recommend."

Mitch A on December 2023


"So far so good. Snaking of kitchen sink with very old pipes. Hopefully snake did not poke pipes. Only time will tell. Keeping fingers crossed. They did a good job explaining and triple checked for leaks before they left. Of course they tried to upsell and gave us a metal trap they did not quote us upfront for. We would have chosen it over plastic, but price difference would need to be cleared upfront. That's the only negative. Otherwise, thus far we are very happy with the result. Thank you for coming on such short notice and on time! Super appreciated. 4.5-5 stars."

Susanne P on December 2024

Amesos Plumbing, Inc. 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 an estimate today!

"So far so good. Snaking of kitchen sink with very old pipes. Hopefully snake did not poke pipes. Only time will tell. Keeping fingers crossed. They did a good job explaining and triple checked for leaks before they left. Of course they tried to upsell and gave us a metal trap they did not quote us upfront for. We would have chosen it over plastic, but price difference would need to be cleared upfront. That's the only negative. Otherwise, thus far we are very happy with the result. Thank you for coming on such short notice and on time! Super appreciated. 4.5-5 stars."

Susanne P on December 2024


Avatar for Valley Heating, Cooling, Electrical and Solar

Valley Heating, Cooling, Electrical and Solar

1171 N 4th St
4.73(
1,691
)
Approved Pro

Valley Heating, Cooling, Electrical and Solar

1171 N 4th St
4.73(
1,691
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
30 local quotes requested

Since 1962, we have been committed to living up to our company slogan every day – The Home of Old Fashioned Service. That means reliability, expert advice, quality work and great service for our customers – and a 100% guarantee. Our entire team can’t wait to show you the difference great service can make for your heating, cooling, electrical, solar and above all, “comfort” needs. We sub-contract with licensed plumbers when necessary.

"watch out - they charge a service fee for quotes"

Joshua M on February 2021

Since 1962, we have been committed to living up to our company slogan every day – The Home of Old Fashioned Service. That means reliability, expert advice, quality work and great service for our customers – and a 100% guarantee. Our entire team can’t wait to show you the difference great service can make for your heating, cooling, electrical, solar and above all, “comfort” needs. We sub-contract with licensed plumbers when necessary.

"watch out - they charge a service fee for quotes"

Joshua M on February 2021


Avatar for Better Water Heaters

Better Water Heaters

3010 Ridgegate Drive
4.49(
190
)
Approved Pro

Better Water Heaters

3010 Ridgegate Drive
4.49(
190
)
Approved Pro
Customers say: Super punctual
35 local quotes requested
24 years of experience

We started Better Water Heaters to provide fair pricing and quality service to the customers seeking water heater service or replacement. The truth is, most companies overcharge because they know you need hot water immediately and will probably pay a lot to get it quick. My typical customer is one who has price shopped the competition and have decided most companies either charge way too much or are hard to pin down to a firm price. We understand. You simply need a water heater and don’t want to deal with a sleazy salesman…you want to talk to a plumber….so give us a call and we’ll talk. At Better Water Heaters we do something quite rare in the plumbing business- install water heaters for a fair price. We grow our business one satisfied customer at a time; we don’t take advantage of a plumbing emergency and charge unreasonably. Your referral is important to us that is why we always will work to insure your complete satisfaction. We’re a small company and we keep our overhead low, because of this we don’t need to charge unreasonably. Of course we are licensed, bonded and insured and are very experienced at water heater installation and repair. We are experts in convention water heater repair and replacement, Tankless water heater installation, and other plumbing issues. We are the only water heater installation company in northern California that has earned the prestigious DIAMOND CERTIFICATION. We are also member of the Better Business Bureau. Our advertised prices include a quality water heater, basic installation and disposal of your old unit; Extra parts and labor required to do the job right, are additional. Call us for all your water heating needs. Estimates are always free and we never charge extra for nights, weekends, or holidays.

"Better Water Heater installed our tankless water heater incorrectly, creating a significant safety hazard for our tenant, an African American family of 5 with 3 small children. After a contractor from AHS reviewed the installation, they confirmed multiple issues, including code violations and fire risks. Major Problems with the Installation: Unsafe placement in a closet - The condensate has no proper drainage, which could lead to mold, rust, and fire hazards. Improper use of an evaporator pan - This pan is not intended for water heaters, creating a fire risk in an enclosed space. Oversized unit for our home - The Rinnai RU160iN is designed for larger homes. It's far too big for our 1-bed, 1-bath house, making it inefficient. Insufficient gas line - According to AHS, the gas line is too small to support this oversized unit, which could lead to gas flow issues or even pose a fire hazard. The city won't allow this installation to pass inspection because the gas line doesn't meet the required capacity. Permit/code violations - The installation was done without a permit and violates multiple building codes. When we confronted the company, they insisted their work was done correctly. Their "solution"? If we wanted the job to be done legally, we would have to pay for both the permit, their time working with inspectors, and additional costs to fix their mistakes--$995 for a bigger gas line to support the oversized unit. On top of that, they quoted us $585 for permit costs, even though the city building department told us the permit fee is only $150. Bottom Line: If you want a safe, legal, and code-compliant installation, DO NOT trust Better Water Heater. They cut corners, refuse accountability, and expect customers to pay extra to fix their mistakes."

Han-Shen Y on February 2025

We started Better Water Heaters to provide fair pricing and quality service to the customers seeking water heater service or replacement. The truth is, most companies overcharge because they know you need hot water immediately and will probably pay a lot to get it quick. My typical customer is one who has price shopped the competition and have decided most companies either charge way too much or are hard to pin down to a firm price. We understand. You simply need a water heater and don’t want to deal with a sleazy salesman…you want to talk to a plumber….so give us a call and we’ll talk. At Better Water Heaters we do something quite rare in the plumbing business- install water heaters for a fair price. We grow our business one satisfied customer at a time; we don’t take advantage of a plumbing emergency and charge unreasonably. Your referral is important to us that is why we always will work to insure your complete satisfaction. We’re a small company and we keep our overhead low, because of this we don’t need to charge unreasonably. Of course we are licensed, bonded and insured and are very experienced at water heater installation and repair. We are experts in convention water heater repair and replacement, Tankless water heater installation, and other plumbing issues. We are the only water heater installation company in northern California that has earned the prestigious DIAMOND CERTIFICATION. We are also member of the Better Business Bureau. Our advertised prices include a quality water heater, basic installation and disposal of your old unit; Extra parts and labor required to do the job right, are additional. Call us for all your water heating needs. Estimates are always free and we never charge extra for nights, weekends, or holidays.

"Better Water Heater installed our tankless water heater incorrectly, creating a significant safety hazard for our tenant, an African American family of 5 with 3 small children. After a contractor from AHS reviewed the installation, they confirmed multiple issues, including code violations and fire risks. Major Problems with the Installation: Unsafe placement in a closet - The condensate has no proper drainage, which could lead to mold, rust, and fire hazards. Improper use of an evaporator pan - This pan is not intended for water heaters, creating a fire risk in an enclosed space. Oversized unit for our home - The Rinnai RU160iN is designed for larger homes. It's far too big for our 1-bed, 1-bath house, making it inefficient. Insufficient gas line - According to AHS, the gas line is too small to support this oversized unit, which could lead to gas flow issues or even pose a fire hazard. The city won't allow this installation to pass inspection because the gas line doesn't meet the required capacity. Permit/code violations - The installation was done without a permit and violates multiple building codes. When we confronted the company, they insisted their work was done correctly. Their "solution"? If we wanted the job to be done legally, we would have to pay for both the permit, their time working with inspectors, and additional costs to fix their mistakes--$995 for a bigger gas line to support the oversized unit. On top of that, they quoted us $585 for permit costs, even though the city building department told us the permit fee is only $150. Bottom Line: If you want a safe, legal, and code-compliant installation, DO NOT trust Better Water Heater. They cut corners, refuse accountability, and expect customers to pay extra to fix their mistakes."

Han-Shen Y on February 2025


Avatar for Knockout Plumbing & Repipe Inc.

Knockout Plumbing & Repipe Inc.

191 Dillon Avenue
3.67(
3
)
Approved Pro

Knockout Plumbing & Repipe Inc.

191 Dillon Avenue
3.67(
3
)
Approved Pro
Customers say: Quick response
235 local quotes requested
4 years of experience

Knockout Plumbing Repipe Inc. provides residential plumbing services with customized solutions that fit every budget. We are a family owned local company that serves the greater Silicon Valley and surrounding areas. With a combined work experience of 40 years in the industry, our office staff and technicians can knockout any of your plumbing problems, anywhere from, drain/sewer back ups, drain/sewer leaks, drain/sewer clean, faucet replacement/repair, gas system installations, rooting services, water leak repairs, water heater repairs/replacements, whole house repiping, etc. Give us a call to book a free estimate 669-400-9662. We are your community plumbing experts!

"Went fine, but after doing some research, I think I overpaid for the service (by a lot!)."

Raed S on May 2025

Knockout Plumbing Repipe Inc. provides residential plumbing services with customized solutions that fit every budget. We are a family owned local company that serves the greater Silicon Valley and surrounding areas. With a combined work experience of 40 years in the industry, our office staff and technicians can knockout any of your plumbing problems, anywhere from, drain/sewer back ups, drain/sewer leaks, drain/sewer clean, faucet replacement/repair, gas system installations, rooting services, water leak repairs, water heater repairs/replacements, whole house repiping, etc. Give us a call to book a free estimate 669-400-9662. We are your community plumbing experts!

"Went fine, but after doing some research, I think I overpaid for the service (by a lot!)."

Raed S on May 2025


Avatar for AAA Mike Counsil Plumbing and Rooter

AAA Mike Counsil Plumbing and Rooter

1915 O Toole Way
4.05(
309
)
Approved Pro

AAA Mike Counsil Plumbing and Rooter

1915 O Toole Way
4.05(
309
)
Approved Pro
Customers say: Quality work
361 local quotes requested
31 years of experience

Mike Counsil Plumbing has been family owned and operated from the start. Our customers are our neighbors, and we are proud to be part of the community. We offer the highest quality of plumbing, and friendliest customer service in the industry. When you want it done right, call Mike Counsil Plumbing. Owner operated since 1994. 50 employees. All technicians drug tested and background checked.

"Went well"

Kevin L on May 2025

Mike Counsil Plumbing has been family owned and operated from the start. Our customers are our neighbors, and we are proud to be part of the community. We offer the highest quality of plumbing, and friendliest customer service in the industry. When you want it done right, call Mike Counsil Plumbing. Owner operated since 1994. 50 employees. All technicians drug tested and background checked.

"Went well"

Kevin L on May 2025

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Boiler Repair questions, answered by experts

Yes. Boilers need water to run without overheating, also known as dry firing. If you run it without a sufficient volume of water, either because of a burst pipe or a leak, you run the risk of damaging your machine or jeopardizing the safety of your home as a whole. When in doubt, shut off your boiler and repair any plumbing issues before turning it back on. Alternatively, consider installing a low-water cutoff (LWCO) before any issues arise. This gadget will protect your boiler by monitoring water levels and automatically shutting it off if it gets too low. 

A home radiator works by using radiation and convection to transfer heat throughout your home. Electric radiators use metal to conduct heat and warm the air, which then rises to warm the room. Steam and hot water radiators work with a boiler and piping system to pump thermal energy throughout the home. Hot water radiators use a boiler to heat the water before circulating it to the radiator, while steam heating radiator systems convert the heated water to steam before circulating it out. When the water or steam cools, it travels back to the boiler to be heated again.

Leaks, pressure loss, air in the system, burner failures, and thermostat malfunctions are common problems that require professional repair.

There are several types of home radiators, and the most common are steam heat radiators, electric radiators, and dual-fuel radiators. Steam heat radiators are connected to a boiler. Electric radiators can operate without being connected to anything else—they just need an electrical outlet. If you have a dual-fuel radiator, you’ll see a valve at the bottom of the system with a wire coming out of it and going into a wall. These are often your towel radiators in the bathroom. The type of radiator you have will impact how you turn it on.

There are a couple of signs that will tell you it’s time to bleed the radiator. If the radiator is making noises, it’s typically because of trapped air, which you can release by bleeding the radiator. You can also test the radiator by turning on your heat and then placing your hand near the top and bottom of the radiator. If you feel cold spots, particularly at the top of the radiator, it’s time to bleed it.

The Cupertino, CA homeowners’ guide to boiler repairs

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