Services
Comprehensive HVAC Services You Can Rely On.
At Guido’s Service, we provide complete heating, cooling, and indoor air quality solutions for homes and businesses. From new installations and preventative maintenance to emergency repairs and comfort upgrades, our experienced team delivers dependable service, personalized care, and year-round performance that ensures your system operates efficiently and reliably.
Floor Furnace Repair Services in Oakland
At Guido’s Service, we specialize in repairing and restoring floor furnaces for homeowners in Oakland, Hayward, and throughout the East Bay. These systems are a distinctive type of heating, most often found in older houses, installed directly into the floor above a crawl space. While they can provide reliable warmth when maintained properly, they are also difficult to service—especially in homes with narrow or hard-to-reach crawl spaces. That’s exactly where our expertise makes the difference.
We go where others won’t. Unlike many HVAC contractors who avoid servicing older equipment, our experienced team at Guido’s Service is committed to maintaining and repairing these classic heating units. Whether your floor furnace is failing to heat evenly, releasing strange odors, or has stopped functioning completely, we perform detailed inspections, accurate troubleshooting, and cost-effective solutions.
Our technicians are highly skilled in working with vintage equipment and know how to address problems that less experienced companies often miss. From repairing gas valves and pilot assemblies to restoring airflow and ensuring safety, we provide the thorough care these systems require to keep operating efficiently.
For homeowners relying on a floor furnace as their main heating source, we understand that fast and dependable service is essential. That’s why Guido’s Service delivers prompt repairs, honest advice, and lasting results you can trust.
When you need proven floor furnace specialists in Oakland, Hayward, or anywhere in the East Bay, turn to Guido’s Service—the local team dedicated to getting the job done right.
HVAC Installation
At Guido’s Service, we provide professional HVAC installation for residential and commercial clients throughout Contra Costa and Alameda counties. With more than 30 years of hands-on experience, we understand that proper installation is the foundation of lasting comfort, energy efficiency, and reliable performance.
Each project begins with a thorough evaluation of your property and its specific heating and cooling requirements. We consider factors such as square footage, insulation quality, number of rooms, and daily usage patterns to recommend the best system for your needs—whether it’s a central air conditioner, furnace, heat pump, or ductless mini-split unit.
We partner with trusted manufacturers and offer high-efficiency equipment designed to lower energy costs while improving indoor air quality. Our licensed technicians adhere to all local building codes and safety guidelines, handling permits and compliance so you can enjoy a stress-free installation process.
Once installation is complete, we carefully test the system to ensure proper performance, airflow, and temperature consistency. We also guide you through system controls, thermostat features, and maintenance practices to maximize lifespan and efficiency.
Whether you’re replacing an outdated system or outfitting a brand-new property, Guido’s Service delivers expert HVAC installations built on honest pricing, clear communication, and skilled workmanship. From start to finish, our goal is to provide dependable solutions that keep your space comfortable all year.
Ready to upgrade your comfort? Schedule your free consultation with Guido’s Service today and discover the difference of working with a trusted local HVAC team.
Commercial HVAC Services
At Guido’s Service, we know that reliable comfort, energy efficiency, and consistent performance are essential for any successful business. That’s why we provide specialized commercial HVAC solutions for offices, retail locations, restaurants, warehouses, and a variety of other commercial spaces across Contra Costa and Alameda counties.
Commercial HVAC systems require a higher level of expertise than residential units. With over 30 years of experience, our skilled team is prepared to manage every aspect of large-scale installations, full system replacements, scheduled maintenance, and emergency repairs.
Each project begins with a detailed evaluation of your building’s structure, usage patterns, and climate needs. From this assessment, we design and implement a system tailored to your business, whether that involves rooftop units, packaged systems, zoning configurations, or ductwork upgrades.
Beyond installation, we offer preventive maintenance programs designed to keep your HVAC system running at peak efficiency year-round. Regular servicing reduces unexpected failures, improves indoor air quality, and ensures a consistently comfortable environment for both employees and customers.
When problems occur, we act quickly to minimize downtime and restore operations without unnecessary delays. We understand how valuable time is in business, and our priority is delivering reliable solutions that protect your productivity.
From advanced energy-efficient upgrades and indoor air quality improvements to urgent service calls and routine inspections, Guido’s Service is your trusted partner for commercial HVAC. Contact us today to learn how we can keep your business cool during the hottest summers, warm throughout the coldest winters, and running efficiently every day of the year.
System Replacement
If your HVAC system is outdated, inefficient, or frequently breaking down, it may be the right time to consider a full system replacement. At Guido’s Service, we assist homeowners and business owners throughout Contra Costa and Alameda counties in upgrading to modern, high-efficiency HVAC solutions designed to provide superior comfort, performance, and dependability.
A replacement involves more than simply swapping out old equipment. Our process starts with a complete evaluation of your current system, including ductwork, thermostats, airflow, and energy usage. After this assessment, we recommend replacement options best suited for your property, budget, and long-term goals.
We partner with trusted brands and install high-efficiency systems that not only meet today’s rigorous energy standards but also help lower your monthly utility costs. Our licensed technicians manage every step—from removing outdated equipment and preparing the site to installing the new unit and performing detailed tests to confirm everything functions properly.
System replacement also gives you the chance to improve indoor air quality and integrate smart thermostat technology for better control and efficiency. We ensure you are fully comfortable with your new system by explaining how it works and providing guidance on maintenance practices.
With more than 30 years of proven expertise, Guido’s Service delivers system replacements you can count on, backed by skilled workmanship, integrity, and personalized care. Let us help you make a valuable investment that enhances comfort, boosts efficiency, and delivers reliable results throughout every season.
Emergency Repairs
When your HVAC system fails without warning, you need fast, dependable service you can trust. At Guido’s Service, we provide prompt emergency repair solutions for residential and commercial clients across Contra Costa and Alameda counties—because restoring comfort should never have to wait.
From a furnace that stops working on a freezing night to an air conditioner that breaks during a sweltering summer day, our skilled technicians are ready to respond quickly. We perform efficient diagnostics and offer honest, upfront recommendations to get your system operating again as soon as possible.
Our service vehicles are stocked with essential parts, enabling us to complete most repairs immediately. We work with all major HVAC makes and models, and we never rely on temporary fixes. Instead, we deliver lasting solutions that restore comfort and give you peace of mind.
Emergency repairs can also protect your property. A broken heater in low temperatures risks frozen pipes, while inadequate cooling in a commercial setting can reduce productivity or impact sensitive equipment. That’s why we treat every call with urgency and professionalism.
With over 30 years of proven experience, Guido’s Service combines reliable repairs, transparent pricing, and clear communication—even under pressure. When your HVAC system breaks down, count on us to bring comfort back quickly, safely, and effectively.
Don’t let an unexpected breakdown disrupt your life or business—contact Guido’s Service and get expert emergency repair when you need it most.
Preventive Maintenance
Your HVAC system works tirelessly year-round to keep your home or business comfortable—and like any piece of equipment, it requires consistent care to stay reliable. At Guido’s Service, we provide thorough preventive maintenance programs designed to extend system life, boost efficiency, and help you avoid costly breakdowns.
Our maintenance services are tailored for both residential and commercial properties and include seasonal tune-ups, detailed inspections, cleanings, and performance checks. Whether preparing your furnace for winter or ensuring your air conditioner is ready for summer, we make certain every component is operating safely and efficiently before peak demand hits.
During each visit, our technicians inspect refrigerant levels, clean coils and filters, test thermostat function, check electrical connections, lubricate moving parts, and identify early signs of wear. Addressing small issues before they escalate prevents major repairs and can save thousands in emergency costs or premature replacements.
Preventive maintenance not only extends equipment life but also improves indoor air quality, reduces utility bills, and provides steady airflow throughout your space. For commercial clients, this translates into fewer disruptions and a more comfortable environment for both employees and customers.
With more than 30 years of proven experience, Guido’s Service brings professionalism, reliability, and care to every maintenance call. Our mission is to keep your HVAC system running at peak performance, season after season.
Reach out today to learn more about our preventive maintenance options and schedule your next service. A well-maintained system means lower energy costs, cleaner air, and dependable comfort all year long.
HVAC Services for Realtors
At Guido’s Service, we provide professional HVAC solutions designed specifically for the needs of real estate professionals. Whether preparing a property for sale, managing a new listing, or coordinating a smooth transition for new homeowners, our services add comfort, efficiency, and value to every home. Realtors know buyers place great importance on heating and cooling systems, and we make sure your listings are shown in their best condition.
We deliver detailed inspections and clear HVAC reports that outline system performance, giving sellers transparency and buyers confidence. When repairs or replacements are required, our skilled technicians respond quickly with cost-effective solutions—keeping transactions on track and free from delays. For new construction or remodeled homes, we handle full installations using high-quality, energy-efficient equipment that makes the property more attractive and market-ready.
Our preventive maintenance programs are ideal for homes on the market, ensuring HVAC units operate reliably during showings, inspections, and closings. By maintaining performance and preventing failures, we help protect the value of the property throughout the selling process.
With dependable service, competitive rates, and a commitment to presentation, Guido’s Service supports realtors in closing deals more efficiently and with greater peace of mind. From inspections to installations, we provide HVAC expertise that highlights a home’s true potential. Every property deserves to be comfortable, efficient, and move-in ready—and we’re here to make that happen.
Guido's HVAC Services
Advantages
Thermostat Upgrades
Upgrading your thermostat is one of the easiest and most affordable ways to boost HVAC performance, improve comfort, and increase energy efficiency. At Guido’s Service, we provide professional thermostat installation and upgrades for homeowners and businesses across Contra Costa and Alameda counties—giving you smarter control of your indoor climate.
Traditional thermostats often deliver uneven temperatures and waste energy due to lack of precision. By upgrading to a modern programmable or smart thermostat, you gain the ability to manage heating and cooling more effectively—whether you’re at home, at work, or away.
Smart thermostat technology provides remote access through your smartphone, tablet, or computer, allowing adjustments anytime and anywhere. Many advanced models even learn your habits, adapting automatically to optimize comfort while reducing energy costs.
Our experts help you choose the thermostat best suited to your HVAC system, lifestyle, and budget. We take care of the installation, setup, and provide a complete walkthrough so you feel confident using your new device. For businesses, we offer solutions that integrate with building automation systems, making it easier to manage multiple zones and reduce overhead costs.
Upgrading your thermostat can also extend your HVAC system’s life by minimizing overuse and preventing rapid cycling that strains equipment. The result is a system that operates more efficiently, lasts longer, and keeps your space consistently comfortable.
If your thermostat is outdated, inaccurate, or difficult to use, now is the time for an upgrade. Contact Guido’s Service today to experience smarter, more efficient climate control—right at your fingertips.
Seasonal System Inspections
Your HVAC system faces different challenges as the seasons change—and the smartest way to keep it performing efficiently is with regular seasonal inspections. At Guido’s Service, we provide thorough checkups before both summer and winter, ensuring your equipment is prepared to deliver dependable comfort when you need it most.
Seasonal inspections are a proactive safeguard, designed to catch small issues before they escalate into costly repairs. Our skilled technicians carefully examine your entire system, including thermostats, electrical connections, refrigerant levels, filters, blower motors, and safety controls. We also clean key components, secure connections, and check for any wear that could cause breakdowns during periods of heavy demand.
By detecting problems early, we help prevent unexpected failures at the very moments your system is under the most strain—hot summer afternoons or cold winter nights. These inspections also improve energy efficiency, lower utility bills, and extend the life of your HVAC system.
For homeowners, this means peace of mind and uninterrupted comfort throughout the year. For business owners, it means fewer disruptions, reduced costs, and a consistently welcoming environment for both employees and customers.
At Guido’s Service, we recommend scheduling inspections twice annually: once in the spring before cooling season, and again in the fall before heating season begins.
Don’t wait for an emergency to remind you of your system’s importance. Contact Guido’s Service today to schedule your seasonal inspection and ensure your HVAC is ready for whatever the weather brings. Reliable comfort starts with preventative care.
Air Duct Cleaning
Clean air ducts are essential for maintaining healthy indoor air quality and ensuring your HVAC system runs at peak efficiency. At Guido’s Service, we provide professional air duct cleaning for homes and businesses across Contra Costa and Alameda counties—helping you breathe fresher air while protecting your HVAC investment.
Over time, ductwork can collect dust, pollen, pet dander, mold spores, and other contaminants. Each time your system operates, these particles are circulated throughout your living or working space, potentially triggering allergies, respiratory concerns, and reducing overall comfort. Dirty ducts also restrict airflow, forcing your HVAC system to work harder and consume more energy.
Our detailed cleaning process begins with a full system inspection. Using advanced tools and high-powered vacuums, we remove accumulated debris, sanitize ducts when necessary, and clear any blockages. We also check for leaks, mold growth, or rodent activity that could compromise system performance or indoor air quality.
Routine duct cleaning not only improves the air you breathe but also helps extend the life of your HVAC equipment by reducing strain on blowers, filters, and other components. For commercial properties, it ensures a healthier environment for employees and customers while aligning with building health requirements.
At Guido’s Service, we recommend scheduling duct cleaning every three to five years, or sooner if you’ve completed renovations, have pets, or suffer from allergies.
Take a proactive step toward healthier indoor air and more efficient system performance. Contact Guido’s Service today to schedule your air duct inspection and cleaning—and enjoy a cleaner, safer, and more comfortable environment year-round.
Indoor Air Quality
The air you breathe indoors directly impacts your health, comfort, and overall quality of life. At Guido’s Service, we deliver professional indoor air quality (IAQ) solutions for both residential and commercial clients throughout Contra Costa and Alameda counties—because clean, healthy air should always be a priority.
Many homes and businesses experience poor indoor air quality without realizing it. Dust, allergens, pet dander, mold spores, volatile organic compounds (VOCs), and bacteria often circulate through HVAC systems, leading to symptoms such as coughing, headaches, fatigue, or allergy flare-ups. Left untreated, these contaminants can continue to build up, reducing both comfort and wellness.
Our IAQ services include the installation of advanced filtration systems, whole-home air purifiers, UV sanitation lights, humidifiers, dehumidifiers, and upgraded ventilation systems. We take time to evaluate your environment, understand your concerns, and design personalized solutions that fit your health needs, space requirements, and HVAC setup.
Cleaner indoor air doesn’t just benefit your well-being—it also supports your HVAC system. Reducing airborne debris helps prevent dust accumulation in filters and ductwork, increases energy efficiency, and allows your system to run more smoothly, quietly, and effectively.
Whether you are battling allergy triggers, lingering odors, high humidity, or simply want to create a healthier living or working environment, Guido’s Service has the knowledge and tools to make a real difference.
Take control of the air you breathe. Contact us today to schedule an indoor air quality consultation and discover how we can help transform your property into a cleaner, safer, and healthier place year-round.
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We're Here to Help
Have a question or need HVAC service? Whether you’re looking for a new installation, routine maintenance, or urgent repairs, our team at Guido’s Service is ready to assist you. We proudly serve Contra Costa and Alameda counties with fast, friendly, and professional support.
Give us a call, send us a message, or request a free estimate—we’ll get back to you as soon as possible. Your comfort is just one call away.
- (925) 594-3545
- guidoshvacservices@gmail.com
- Mon. - Sat. : 8:00AM - 6:00PM