Some of our latest projects
A selection of installs and retrofits from the last two years — homes, hotels, clinics and one very stubborn Victorian.
01
/06
Hospitality · Oakland
The rooftop plant on handover day, after the last unit went in.
Hospitality · Oakland
Hotel HVAC maintenance programme
A 240-room hotel running eleven rooftop units, four of them original to 1998. We took over the maintenance contract in March, mapped every zone, then replaced the worst offenders one weekend at a time. No floor ever went offline and no guest was moved.
Client
Harbourline Hotel
Scope
11 RTUs, 240 fan coils
Duration
11 weeks, phased
Completed
March 2026
Outcome
24% lower summer energy use
02
/06
Residential · Berkeley
A head tucked high on the wall, so the original plaster stayed untouched.
Residential · Berkeley
Multi-zone cooling for a 1912 Craftsman
No ducts, no soffits to hide them in, and a homeowner who would not lose an inch of ceiling. Four ducted mini-split zones went into the attic and crawlspace instead, each one balanced room by room against a manual load calculation.
Client
Private residence
Scope
4 ducted zones, 11 rooms
Duration
9 days
Completed
August 2025
Outcome
No plaster cut, one access hatch
03
/06
Commercial · Emeryville
Sunday afternoon on the roof, the last unit set and the ladder still up.
Commercial · Emeryville
Six rooftop units replaced over one weekend
A print shop that cannot stop the presses on a Monday. We staged the swap around a Friday shutdown: crane on site at 6am Saturday, all six curbs adapted and units set by Sunday afternoon, controls commissioned before the first shift.
Client
Bayline Print Co.
Scope
6 rooftop units, new curbs
Duration
52-hour shutdown
Completed
October 2025
Outcome
Zero production hours lost
04
/06
Retrofit · Alameda
The cold-climate heat pump, sized at design temperature rather than rule of thumb.
Retrofit · Alameda
All-electric heat pump conversion, gas removed
The owners wanted the gas line capped for good. That meant a heat pump that still works at 28°F, a water heater to match, and a panel with room for both. We ran the load calculation twice before quoting — the house now runs on one meter.
Client
Private residence
Scope
Heat pump, HPWH, panel work
Duration
6 days
Completed
February 2026
Outcome
Gas service permanently capped
05
/06
Commercial · Oakland
The corridor after balancing — new supply and return above a ceiling nobody had to replace.
Commercial · Oakland
Clinic ventilation upgrade to 6 air changes
Four exam rooms and a waiting area moved from two air changes an hour to six, with HEPA filtration on the return. Work ran in the evenings, room by room, so the clinic never cancelled a day of appointments.
Client
Fruitvale Family Clinic
Scope
5 spaces, HEPA return
Duration
3 weeks, evenings
Completed
January 2026
Outcome
6 ACH verified after balancing
06
/06
Commercial · Oakland
Service carried on through the whole rebuild — the work happened between lunch and dinner.
Hospitality · San Leandro
Kitchen make-up air rebuilt without closing
The hood was pulling harder than the building could replace, dragging cold air down the dining room and tripping the pilot on the range. We rebalanced the exhaust and added dedicated make-up air, working in the gap between services.
Client
Casa Marena
Scope
Hood rebalance, make-up air unit
Duration
8 days, split shifts
Completed
May 2026
Outcome
Not one service cancelled
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31%
Median saving after retrofit
1.9d
Average install duration
0
Warranty claims denied