A-1 Guaranteed is a one-stop HVAC contractor helping Oakland homeowners with their heating, cooling, home performance, and water heating needs. Homes in the Bay Area come in every shape, size, and age, and our family-owned company has been finding solutions for all of them since 1996.
From older bungalows with limited ductwork to hillside homes with complex layouts, we’re known across the Oakland area as experts in unusual jobs. If you’re adding AC for the first time, upgrading a failing furnace, or dealing with rooms that never seem to stay comfortable, give us a call.
Heat Pump & Electrification Specialists
Upgrading to a heat pump is a way for Oakland homeowners to reduce reliance on fossil fuel heating and add cooling, all while preparing for an all-electric future. A-1 Guaranteed follows a whole home process to understand your space and build a plan that makes sense for your specific needs.
Our heat pump and electrification services include:
- Ducted Heat Pumps: Replace an older furnace and central AC with one system that connects to your existing ductwork.
- Ductless Mini Splits: Add efficient heating and cooling with zoned comfort controls. They’re a good fit for homes without ductwork or for individual rooms ducts don’t reach.
- Gas-to-Electric Conversions: Make a plan to upgrade your home to all-electric equipment at a pace that aligns with your goals and budget.
Heating & Cooling Services in Oakland
A-1 Guaranteed installs, repairs, and maintains furnaces and air conditioning systems in homes across Oakland.
- Furnace Repair & Replacement: Restore reliable heating or replace aging equipment with a properly-sized system for your home.
- Central Air Conditioning Installation & Replacement: Service or replace AC, including for homes without air conditioning or working ducts.
- HVAC Maintenance Programs: Our Kasey’s Club members receive preventative maintenance services, reduced HVAC repair fees, and credits toward new equipment.
- Heat Pump Service & Maintenance: Maintain the ducted or ductless system you already have with local heat pump specialists.
Oakland Insulation, Indoor Air Quality, and Water Heater Services
A-1 Guaranteed takes a whole-home approach, giving Oakland homeowners one trusted contractor for a variety of improvements.
- Insulation & Air Sealing: Improve attic and crawl space insulation and seal gaps throughout your home to reduce energy waste and help your HVAC system.
- Indoor Air Quality: Address dust, allergens, and wildfire smoke with air purification and duct services.
- Heat Pump Water Heaters: Improve safety and upgrade to a more efficient hot water heater, without relying on combustion.
- Tankless Water Heaters: Get on-demand hot water with a reliable and high-efficiency system.
Start Your Oakland Home Upgrades with A-1 Guaranteed
We’re a participating contractor with several Oakland incentive programs, and if we can save you money with rebates or special financing, we will! Our team can help you unpack these programs and even handle the paperwork for you. A-1 Guaranteed brings experienced, whole-home planning to every job in Oakland and beyond. From the first free estimate to long-term support, we’re 100% independent, family-owned, and here for the long haul.
