HVAC Upgrade with Carrier Multi-Position System in Los Altos, CA

Outdoor block Carrier HVAC installation

Type of work performed: HVAC system installation

Area of the apartment: 130m²

Material/technique used: Carrier multi-position air handler with Carrier heat pump

Location: Los Altos, California

Living in California means you need an HVAC system that can keep up with warm summers, cool winters, and tight installation spaces. That’s exactly what our recent project in Los Altos was all about: making comfort possible, even when space is limited.

Our client needed an efficient, quiet heating and cooling solution that could be installed in a confined attic. The existing system was outdated and bulky, and it was clear from the beginning that a standard-sized air handler just wouldn’t fit. They wanted a solution that wouldn’t require major structural modifications but still delivered powerful performance.

Enter Carrier’s new high-efficiency, multi-position air handler. This model is designed to be split into two sections—a lifesaver when working with attics or tight utility spaces. Pairing it with a matching high-efficiency Carrier heat pump allowed us to deliver the full package: heating, cooling, and energy savings in one streamlined system.

The project kicked off with a full assessment of the existing equipment, space constraints, and electrical supply. Since the Carrier air handler can operate on either 208/230V or 115V, we had flexibility in how we approached installation—no need to rewire or upgrade the panel. Once the old unit was safely removed, our technicians carefully maneuvered the split air handler into the attic and assembled it on-site. The Carrier heat pump was positioned outside the home, connected and calibrated to work in sync with the indoor unit.

After installation, the client immediately noticed a difference. Temperature control became consistent across all rooms. Noise levels dropped noticeably. Most importantly, they saw an almost 35% reduction in energy usage compared to the previous system—a win for both their utility bill and the environment.

This new Carrier system wasn’t just chosen for its compact design. It uses variable-speed technology that adapts to the home’s needs in real time, reducing cycling and improving overall comfort. Plus, its compatibility with smart thermostats ensures even greater control and efficiency.

For maintenance, we recommend seasonal tune-ups, keeping filters clean, and ensuring the outdoor unit stays clear of debris. With proper care, this system will continue performing efficiently for years to come.

Thinking about upgrading your HVAC system but worried about space? Contact our expert team today and learn how we can bring high-efficiency climate control to your California home, no matter how tight the fit.

Phone: (408) 733-2000

Email: info@airandplumbing.com

If you are considering upgrading the HVAC system in your residential or multifamily property, contact our team to learn more about advanced heat pump solutions tailored to the California climate and building code requirements.

Air & Plumbing Systems
4.8
Based on 187 Reviews
Paul N.
Paul N.
2025-11-26 14:18:44
I recommended Air & Plumbing to all my clients and everyone looking for new systems or repairs. after six months searching and looking for a company I… read more
George ..
George ..
2025-10-26 22:01:40
Great response time for the appointment. Professional service. Fixed the problem. I would use them again. Note that their service charge quote was the… read more
Mary C.
Mary C.
2025-10-11 17:07:14
I had a great experience working with Mark and his team.Mark is super responsive and professional. When I was working with him for my heat pump air conditi… read more
Alan K.
Alan K.
2025-09-19 18:58:30
Mark installed my HVAC last year. He had some issues due to a defect on the Carrier HVAC. Mark came back and troubleshoot the system to get it in working… read more
Maia S.
Maia S.
2025-08-24 15:40:46
Eugene was able to come out same day (Saturday) to do an inspection when our air conditioner stopped circulating cool air. He was so efficient and… read more
Wenlong L.
Wenlong L.
2025-07-17 17:29:43
The good side is that Mark responded quickly and set up an appointment for the next day. The diagnostic price is the lowest of what I know of. Both the… read more
Carolyn H.
Carolyn H.
2025-07-12 14:38:42
Our AC unit was blowing warm air. After I sent a request for service, Air & Plumbing answered me with a quote for service charge of $49 and that they have… read more
Sean I.
Sean I.
2025-06-04 19:04:52
Right after a recent heatwave it became obvious that my upstairs AC was barely working. It’s over 30 years old and a heat pump so expected to be told that I… read more
Hannah G.
Hannah G.
2025-06-04 15:10:01
Great service. A technician was at my door within a few hours after I first got in touch with them. He was very helpful and honest. He was able to do what… read more
Hadi Khazraee
Hadi Khazraee
2025-05-29 14:08:07
We had Air & Plumbing Systems install two heat pump systems for our house. The cost was very reasonable and we could not be happier with the service we… read more
Mark C.
Mark C.
2025-05-27 17:47:37
Edward did a fantastic job helping us install the mini split system. Great communication great work! This is the third time using this company for the past… read more
Andrew B.
Andrew B.
2025-05-13 14:12:41
It was that’s time that my air-conditioning system needed an upgrade, so I called my trusted company and they delivered an excellent job. System… read more
H. N.
H. N.
2025-05-06 10:51:38
After online request for information and pricing, I decided to have A&PS come out for diagnostic visit for our water-leaky AC indoor unit. Eduard spent… read more
Misha S.
Misha S.
2025-04-14 11:27:02
Best company I ever use in my life responding right away. Prices is the best and getting job done very well thank you. read more
Gary
Gary
2025-02-13 18:28:07
we hired A&P Systems because we had a strong smell of gas when the heater came on. The technician Eugene, was on time and was very professional as he… read more
Jilong K.
Jilong K.
2025-02-08 14:55:23
Great service and reasonable price. Highly recommended. They offer lower diagnostic fee for the first visit. read more
Yuankun X.
Yuankun X.
2025-01-17 20:20:03
Eugene is fantastic. Our furnace shut down all of sudden and stuck at lockout state, despite many resetting attempts. It was a Friday afternoon and hard to… read more
Bosco F.
Bosco F.
2024-12-17 11:34:35
I met Mark Fridlyland of Air & Plumbing Systems several years back in a “save energy” type of open house for contractors in Los Altos. I ended up using his… read more
Aarthi R.
Aarthi R.
2024-11-15 19:23:50
Eugene was helpful in resolving our furnace issue. He responded quickly to our service request and was able to diagnose and fix the problem within an hour…. read more
Bob R.
Bob R.
2024-11-02 08:50:38
I recently discovered that my furnace was 26 years old so I decided to replace it before winter. Since this summer was unusually hot I decided to add an… read more
Alon M.
Alon M.
2024-10-01 16:37:12
Highly recommended! We hired A&P Systems to replace our duct system. They came in and did very professional work, in addition to a very reasonable price…. read more
Deanna C.
Deanna C.
2024-07-06 11:59:18
I don’t write reviews often, but the exceptional response and service merits recognition since we really appreciate the fast online response and Eugene who… read more
Yuting L.
Yuting L.
2024-07-02 17:07:34
Very responsive and professional. I scheduled an appointment within 12hours. My ac problem got targeted and solved very quickly. Awesome experience. read more
Ruogu L.
Ruogu L.
2024-06-29 18:09:44
Contacted these guys in the afternoon, and they sent Caesar to my house in 1 hour. Caesar is knowledgeable and friendly, quickly identified the problem of… read more
Tianwei X.
Tianwei X.
2024-06-24 12:04:14
Respond quickly and solve the issue immediately. The diagnostics fee is low, but not sure how the repair cost compares with others. read more
Robert
Robert
2024-06-23 21:05:39
Our AC broke down, but we got a working AC within 2.5 hours contacting them on a Sunday. Reasonable price, outstandingly fast response, I will definitely… read more
Chris L.
Chris L.
2024-06-23 15:49:51
Heat wave and our AC stopped working! Late afternoon on a Sunday! And with two little ones in the home. Used Yelp to request estimates, A&P responded almost… read more
Conrad S.
Conrad S.
2024-06-09 17:18:04
Fast response. Reasonable cost. Highly recommended. Would choose them again. Got our AC working very quickly. read more
Rebecca E.
Rebecca E.
2024-06-05 20:49:00
My ac stopped producing cold air today, the hottest day of the year so far. I was able to get it fixed same day! I’m so grateful. Thank you. read more
Sina M.
Sina M.
2024-05-28 09:09:36
Fast response and summer inspection for our AC system. I highly recommend this service. read more
Boris G.
Boris G.
2024-05-21 21:37:46
Installed ac with Air and Plumbing Systems, and it was the best experience I ever had with contracting services company. read more
Misha S.
Misha S.
2024-05-21 21:29:46
Those guys put the air condition for me in my house three or four years ago. They did the maintenance on it right now. I’m so happy they are great people. I… read more
Shlomi G.
Shlomi G.
2024-05-05 13:33:06
I called Mark for help after my HVAC contractor failed to deliver. He was quick to respond and completed the work in a professional manner. I would… read more
Virginia N.
Virginia N.
2024-04-12 12:57:50
I don’t write many reviews.  However, I feel that when someone provides exceptional service and performance they should be recognized.  Air and Plumbing are… read more
Tim T.
Tim T.
2024-03-08 11:38:21
Worked with Mark to get my heat pump water heater installed to replace my gas water heater. Eduard came out and did a very professional job installing a 65… read more
Kevin L.
Kevin L.
2024-03-03 08:16:11
It took some back and firth and several visits, but we were able to get the attic fan issue resolved! read more
Alan K.
Alan K.
2024-02-17 10:55:17
It was great working with Mark and his team. They provided a fair price. They arrived on time and were prepared for the job. On the day of inspection they… read more
Tom J.
Tom J.
2024-01-28 14:31:22
I had a great experience with Air & Plumbing Systems Team on two different occasions. The company both installed a new water heater for my house and some… read more
Kevin L.
Kevin L.
2023-12-21 08:31:37
We contacted Air & Plumbing Systems about getting a heat pump water heater installed. In the process, we also wanted to get an electric car charger and… read more
Malathy A.
Malathy A.
2023-07-25 15:28:59
Our downstairs AC unit wasn’t functioning properly. It was very easy to schedule a service.The tech showed up on time and gave us the diagnosis. The AC… read more