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Giovanni Piazza

9

years in business

9

years in business

$49/on-site estimate

(waived if hired)

It’s free, with no obligation to book

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About
Global Heating & Cooling Services has proudly served the Bay Area since 2010, delivering top-tier air conditioning and heating solutions with integrity, quality, and care. As a locally owned and operated business, we specialize in A/C service, installation, and repairs for residential customers. Our team is committed to honest work, long-lasting results, and complete customer satisfaction. We take pride in the strong relationships we've built with our clients over the years — many of whom return to us again and again. We proudly serve the communities of San Jose, Milpitas, Sunnyvale, Fremont, Los Gatos, Cupertino, Santa Clara, San Mateo, and Alameda County. Let us keep your home comfortable, efficient, and worry-free — year-round.
Overview

Serves Milpitas, CA

Background checked

License verified

8 employees

9 years in business

Business hours

This pro hasn't listed their business hours.

Payment methods

This pro accepts payments via Apple Pay, Cash, Check, Credit card, Google Pay, PayPal, Samsung Pay, Venmo, and Zelle.

Social media

Facebook

Projects and media

21 photos

Projects and media

21 photos

Services offered
Service needed
Type of heating system

Furnace

Heat Pump

Other

Fuel source

Natural gas

Propane gas

Electricity

Other

Reviews
Great 4.8

84 reviews

5

93%

4

2%

3

0%

2

0%

1

5%

Showing 1-5 of 84 reviews
pro avatar
Past Customer
•

Jul 16, 2025

From Google

Five years ago, I replaced a gas furnace with a new heat pump air conditioning, heating, and fan central HVAC system purchased from and installed by Global Heating and Cooling. I couldnt be more impressed with their service from start to finish. The entire team was polite and friendly, punctual, and extremely knowledgeable. John, the owner, took the time to explain my options clearly and helped me choose a system that was both efficient and cost-effective for my needs.The installation went smoothly, in spite of the challenging location selected for the air handler in the attic crawl space with limited area for maneuverability. The team took great attention to detail and left no mess behind. Notwithstanding a blown fuse three years agowhich Global Heating and Cooling diagnosed the cause of no heat being produced by the system and repaired within days of being alerted to the issuethe system has been running perfectly ever since.Global Heating and Cooling just performed the five year maintenance on the system. The appointment was scheduled within days, the technician was on time, completed thorough inspections, and ensured that everything continues to run at peak performance. John, the owner, answers periodic HVAC-related questions I have and repeatedly provides cost-conscious and practical recommendations on both the frequency and maintenance of the system and the benefits and limitations of my smart thermostat. He has never left me the impression that I was being sold on unnecessary services or overly-expensive equipment. Knowing that my system is in expert hands gives me real peace of mind.Their pricing is very competitive, especially considering the level of service and professionalism they deliver. It has been a great decision choosing Global Heating and Cooling and I highly recommend Global Heating and Cooling to anyone looking for HVAC installation or ongoing maintenance!
Giovanni Piazza's reply
Hi M., Thank you for taking the time to leave such a detailed and heartfelt review! We're incredibly grateful for your continued trust in Global Heating and Cooling over the past five years. It's always our goal to provide honest, high-quality service from the initial installation to long-term maintenance—and we’re so glad to hear that’s been your experience. John and the entire team truly appreciate your kind words and your recommendation. We're here whenever you need us and are honored to be the HVAC company you count on for comfort and peace of mind.
pro avatar
Phương N.
•

3 weeks ago

Absolutely Outstanding Service! I had an amazing experience with Global Heating and Cooling Services from start to finish. The team was professional, honest, and extremely knowledgeable. They quickly diagnosed the issue with my system and offered clear options without trying to upsell anything I didn’t need. I ended up doing a full A/C and furnace replacement, and the work was done on time, on budget, and with zero mess left behind. The technician explained everything clearly, and I really appreciated the transparency and attention to detail. You can tell they genuinely care about customer satisfaction—licensed, bonded, insured, and their free diagnostic with repair offer is a great bonus. If you’re looking for trusted HVAC experts in the San Jose Bay Area, Global Heating and Cooling Services is the only company I’ll recommend from now on!
pro avatar
Past Customer
•

Aug 21, 2025

From Google

These guys are awesome! We had a condensation leak coming from the AC but it was hard to find out where. John came out a second time and was able to pinpoint the problem as a plumbing error not even directly part of our HVAC system. He only charged me a very reasonable price for a single visit. I would gladly use them for any future HVAC work I need.
pro avatar
Past Customer
•

Aug 7, 2025

From Google

John was very responsive and since it was an emergency situation i describe the situation to him over the phone and he clearly walked me through checking the system. I was able to diagnose with John what the issue was and he was very friendly giving me advised and instructions on how or where to look. Overall was able to work it through with John and was able to narrow down the issue getting my AC system back and running! John was excellent to work with and he is my one go to with all and any HVAC AC issues for the last 10 years!
pro avatar
Past Customer
•

May 7, 2025

From Google

Joey was so bright, efficient and competent. Did the troubleshooting in our air con, replaced the capacitor and we now have a working Air Con for the heat wave! Great service. Thank you!
Credentials
License

License type: C20 – Warm-Air Heating, Ventilating And Air-Conditioning Contractor

License state: CA

License verified on 9/19/2025

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Giovanni Piazza

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