Heat source
A furnace or heat pump sized to heat your home efficiently — chosen to fit your fuel, climate, and comfort needs.
Bay Area HVAC Installation · Licensed · 13+ Years
Whole-System HVAC Installation in the San Francisco Bay Area
A complete HVAC system — heating, cooling, air handling, ductwork, and controls — designed and installed to work as one. The right call for new construction, a home without HVAC, or replacing an entire aging system.
Free estimateLicensed (CSLB #1022608)Whole-system design13+ years experience
Free on-site estimate · No pressure · We come to you
What It Is
A Complete System,
Not Just One Box
HVAC stands for heating, ventilation, and air conditioning — and a full HVAC installation means putting in the whole system, not a single appliance. That's the heat source (a furnace or heat pump), the cooling side (an AC condenser or heat pump), the air handler that moves the air, the ductwork that carries it through your home, and the thermostat and controls that tie it all together — every part sized and matched to work as one.
This is the job for a new build, a home that has no HVAC, or a complete system that's reached the end of its life. It's different from swapping out one failing unit — if only your AC or your furnace has gone and the rest of the system is sound, a targeted replacement is the smarter, more economical move. When it's the whole system, though, designing and installing it together is what delivers even comfort and efficiency — which is exactly what we do.
- The whole system, designed to work together
- Sized to your home with a load calculation
- Matched components for efficiency & warranty
- Ductwork installed or assessed, not ignored
- Even comfort in every room, all year
- For new builds, first-time HVAC, or full replacement
What's Included
What a Full HVAC
System Includes
A complete installation is several matched parts working as one. Here's what goes into the whole-system job.
Cooling
An AC condenser or heat pump to cool the home in summer, matched to the heating side so the whole system performs together.
Air handler & blower
The unit that moves conditioned air through the system — the heart that circulates heating and cooling to every room.
Ductwork
The ducts that carry air through the home. On a full install we design, install, or assess them — because leaky ducts undermine any new system.
Thermostat & controls
Modern controls (including smart or zoned thermostats) that let you manage temperature accurately and efficiently.
Proper sizing
We size the system with a load calculation — not a guess — so it's neither oversized nor undersized, both of which waste energy and comfort.
Do You Need It?
When You Need a Full
Install vs. a Replacement
A whole-system installation is the right call in these situations. If just one unit has failed, a targeted replacement is usually the better fit — we'll tell you honestly which you need.
New construction
A new home or addition with no system in place needs a complete HVAC installation designed for the space from the start.
No existing HVAC
If your home has never had central heating and cooling — or only had one or the other — a full install brings the whole system in.
The whole system is aging
When both the furnace and AC are old and failing, replacing them together as a matched system beats patching one at a time.
Mismatched, cobbled-together units
A furnace and AC from different eras that don't match often underperform — a full install gets them working as one again.
A major remodel
A big remodel or added square footage can outgrow the old system, calling for a redesigned installation to match the new layout.
Switching system types
Moving to a different setup — like an efficient heat pump or a ductless system — is a full-system change, not a simple swap.
How We Work
Our HVAC Installation Process
A system that performs starts with the right design, not just the right equipment. Here's how we handle a full installation.
Assessment & load calculation
We evaluate your home — size, layout, insulation, windows, and ductwork — and run a load calculation to size the system correctly, rather than guessing.
Design & select equipment
We design the system and recommend matched heating and cooling equipment and controls that fit your home, comfort goals, and budget.
Remove old & prep
If there's an existing system, we remove and haul it away, and repair or design the ductwork so the new system has a sound foundation.
Install the system
We install the heat source, cooling, air handler, ductwork, and controls, connecting and matching every component to work as one.
Commission & walkthrough
We start up and test the full system, confirm airflow and temperatures room to room, clean up, and walk you through how it all works.
Free estimateLicensed (CSLB #1022608)Load-calculated sizing
Why Attic Pros
The Bay Area's Trusted
Home-Comfort Team
For over 13 years, Bay Area homeowners and businesses have trusted us for heating and cooling — because we design the system around your home, size and install it properly, and stand behind the work, instead of dropping in a box and hoping it fits.
- Licensed contractor (CSLB Lic. #1022608)
- SPCB-registered for pest-related work (Co. Reg. #9901)
- Diamond Certified & Angi Super Service Award winner
- Independently reviewed — verified Google ratings
- Free, no-obligation on-site estimate
- Local team with 13+ years in Bay Area homes
Real Customers, Real Results
Trusted by Bay Area Homeowners
4.8
★★★★★
Based on 1,900+ verified Google reviews — trusted for heating, cooling & home services across the Bay Area
Google Review
★★★★★
I appreciate the great communication and flexibility. Samim arrived on time and an appointment went well.
G B
Google Review
★★★★★
I'm very impressed with AtticPros' expediency in scheduling a service call. Samim was courteous, well prepared and knowledgable. He quickly provided a thorough assessment of the situation. What really impressed me is how respectful of the (access through the bathroom) area he was. He cleaned up the attic access door and the (little) fallen insulation on the floor. I highly recommend attic pros for rodent extermination and clean up or any other service required.
Lorna Edits
Google Review
★★★★★
Rodent intrusion and the associated damage they cause is the worst! After reading reviews, I decided on Attic Pros because they have great reviews and because they specialize in the work I needed. I was not disappointed. Within a few days of reaching out, Tom came out and did the estimate. The work began only two business days later! The work was scheduled over two days but they did it all in one! The guys arrived on time and were cheerful, polite, and pleasant to deal with. Kevin showed me pictures and video periodically throughout the day so I could see the work, start to finish. He answered all of my questions and explained everything clearly and patiently. Before they left they made sure there was no trash or debris left behind. The crawl space now looks like it belongs under a brand new home, it’s that clean and tidy. I highly recommend Attic Pros for all of your insulation and rodent elimination needs. Update: I came back and edited this, removing a star. The work and workers were great. However, a few days after the job, Julian from their business office messaged me that they had not received payment and the invoice was past due, even though they were paid IN FULL THE DAY OF WORK. Proof of payment was provided and he messaged me that a receipt would be sent when the payment was deposited. Very disappointing and unprofessional of him to go after a customer for payment when the problem lies with their accounts receivable. 10/14/26 I am adding to my review because issues had been discovered over time. They had missed a place where rats were entering, even though they had been out twice to check traps and found some. This guy did a less than thorough cleaning but he did close off the previously missed access point. My rat intrusion problem has been ongoing. 11/6/26 Attic Pros followed through and sent out Raul, an excellent worker, who took care of everything and made it right. While it may have been problematic for a bit, they kept working until it was all made right. They have been kind and communicative, specifically Paula. I will be calling them again in the Spring to work on a different area of my home.
C Hensley
Google Review
★★★★★
Samim very professional
Rick Weiss
Google Review
★★★★★
Did crawl space cleanup and rodent proofing. They were very efficient and thorough.
James Feichtl
Google Review
★★★★★
Samim was great and work very hard. We appreciate him very much.
Amir assadi-rad
QUESTIONS, ANSWERED
Frequently Asked Questions
Straight answers to what people actually ask about a full HVAC installation — what's included, how it differs from a replacement, and how the system is sized. Still weighing your options? Our team is happy to help.
Still have questions?
Talk to our team — we're here to help.
(800) 543-0382The whole system: the heat source (furnace or heat pump), the cooling side (AC condenser or heat pump), the air handler that moves the air, the ductwork that carries it through the home, and the thermostat and controls. On a full install, every part is sized and matched to work together — not just one appliance swapped in.
A replacement swaps a single failing unit into an otherwise-sound, compatible system — for example a new AC when your furnace and ducts are fine. A full HVAC installation designs and installs the entire system together. If only one unit has failed, a targeted replacement is usually cheaper and quicker; see our AC replacement and furnace replacement pages. If the whole system is aging, mismatched, or missing, a full install is the right call.
Typically when there's no existing system (new construction or a home without HVAC), when both the furnace and AC are old and failing, when mismatched units no longer work well together, after a major remodel that outgrows the old system, or when you're switching to a different type like a heat pump. We'll assess your situation and recommend honestly.
With a load calculation, not a rule of thumb. We account for your home's size, layout, insulation, windows, and ductwork to determine the right capacity. Correct sizing matters a lot — an oversized system short-cycles and wastes energy, while an undersized one can't keep up, so we size it to your actual home.
Yes. Ductwork is part of the system, and a brand-new unit on leaky or poorly designed ducts won't perform. On a full installation we design and install new ductwork where needed, or assess and repair existing ducts, so the air actually reaches every room the way it should.
Yes. A heat pump handles both heating and cooling in one system and is a popular efficient option, and a ductless mini-split is ideal for homes without ducts or for adding comfort to specific rooms — see our ductless mini-split installation page. We'll walk you through which system type fits your home best.
It varies with scope. A straightforward system swap can be quick, while a full install that includes new ductwork or a new build takes longer — often a few days. We'll give you a clear timeline with your estimate once we've assessed the job.
Generally, a properly sized, matched, modern system runs more efficiently and evenly than an old, oversized, or cobbled-together one — so most homeowners see better comfort and less waste. We won't quote a specific figure, since real savings depend on your home, the equipment, and how you use it, but designing the system correctly is what makes efficiency possible.
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Serving the Greater Bay Area & Sacramento Area
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Get Your Free HVAC Installation Estimate
Tell us about your home and what you're after — a new system, first-time HVAC, or a full replacement — and we'll assess it, size the system properly, and give you a clear, no-pressure estimate.