Daikin Rooftop HVAC Installation in Pasadena
Cold Cloud Mechanical completed a packaged gas/electric rooftop HVAC replacement on a multi-unit residential building in Pasadena 91107, including a Daikin 3-ton single-stage unit, new curb cap, new plenums, gas line, permit, and HERS testing.
A rooftop HVAC replacement for a multi-unit Pasadena building
This project covered a complete rooftop HVAC replacement on a multi-unit residential building in Pasadena 91107, in the East Pasadena area near Hastings Ranch. The property is served by Pasadena Water and Power, and rooftop packaged systems are common in this stretch of mid-rise residential buildings where indoor mechanical space is limited.
The homeowner needed a like-for-like packaged gas/electric replacement that could handle Pasadena’s hot, dry summers and cooler winter nights, with clean rooftop workmanship and proper coordination with building management for roof access.
Why a packaged rooftop unit was the right replacement
The property needed a single rooftop cabinet that could provide both cooling and gas heat while keeping service access consolidated on the roof. A packaged gas/electric unit matched the building layout and the homeowner’s preference for a like-for-like rooftop replacement.
Interior mechanical space was limited
Rooftop packaged systems are a practical fit for multi-unit buildings where the entire HVAC system can sit on the roof curb instead of occupying interior mechanical space.
Heating and cooling needed one coordinated solution
Pasadena’s hot summers and cooler winter nights made a gas/electric rooftop package unit a clean solution for both cooling and gas heat in one cabinet.
What Cold Cloud Mechanical completed
The project included removal of the existing rooftop packaged unit, roof curb preparation, new sheet metal, supply and return plenum fabrication, gas connection, condensate work, permitting, and HERS testing.
- Removed the existing rooftop packaged unit and prepared the roof curb for the new system.
- Fabricated and installed a 52x52 curb cap verified to the existing opening on site.
- Fabricated and installed new supply and return plenums tied into the existing duct stubs.
- Set the new Daikin packaged gas/electric rooftop unit and secured it to the curb.
- Ran a new gas line to the unit with a sediment trap at the connection.
- Installed a fused disconnect at the unit with a liquidtight whip from the existing power feed.
- Rebuilt the P-trap on the existing condensate drain and confirmed flow.
- Reused the existing Google Nest thermostat with a confirmed C-wire connection.
- Coordinated roof access and equipment staging with building management for the multi-unit property.
- Pulled the residential permit through the City of Pasadena and scheduled HERS testing as part of the install.
- Reviewed existing branch circuit MCA and MOP compatibility before energizing the new equipment.
Daikin 3-ton packaged gas/electric rooftop system
The installation paired a new Daikin rooftop package unit with a properly fitted curb cap, new supply and return plenums, gas connection, condensate P-trap work, and existing thermostat reuse.
Daikin DP3UM3606031A
3-ton single-stage packaged gas/electric rooftop unit with 14.3 SEER2 efficiency.
New 52x52 curb cap and plenums
New curb cap plus new supply and return plenums tied into the existing duct stubs.
Gas line and fused disconnect
New gas line with sediment trap and fused disconnect with liquidtight whip from the existing power feed.
Nest thermostat and rebuilt P-trap
Existing Google Nest thermostat reused with confirmed C-wire, and existing condensate P-trap rebuilt.
Rooftop package units depend on clean curb and plenum work
A packaged rooftop unit on a multi-unit building only performs as well as the curb, plenums, gas line, and drain that tie it to the structure. Matching the curb cap to the existing opening and fabricating clean supply and return plenums helps protect airflow and sealing for the life of the system.
Pairing a Daikin single-stage packaged gas/electric unit with a permitted, HERS-tested install gives the homeowner predictable cooling through Pasadena summers and reliable gas heat through cooler months.
Before, during, and after the Pasadena 91107 rooftop HVAC installation
The photos below show the existing rooftop package unit, equipment staging, crane lift, old unit removal, new Daikin installation, and final before-and-after comparison.
A permitted, HERS-tested rooftop HVAC replacement
This project delivered a clean like-for-like Daikin rooftop package unit installation with properly fitted sheet metal, gas and electrical coordination, condensate work, building management coordination, permit handling, and HERS testing.
Clean rooftop installation
The new Daikin packaged unit was set on the roof curb with new sheet metal, new plenums, and proper rooftop workmanship.
Heating and cooling in one cabinet
The packaged gas/electric system provides both cooling and gas heat from a single rooftop unit.
Permit and HERS coordination
The residential permit was pulled through the City of Pasadena, and HERS testing was scheduled as part of the installation process.
Planning a rooftop HVAC replacement?
Cold Cloud Mechanical installs rooftop packaged HVAC systems with proper sizing, sheet metal work, gas and electrical coordination, permit support, and clean project execution.