PRINCIPAL · BO KELLETT · EST. 1995

Timber residence on a grassy bluff above the Pacific with Pacific fog rolling in
FIG. 00 · FIELD NOTES

I’m Bo. I prepare California Title 24 residential energy reports. One person, one phone line, one piece of software. I started in an engineer’s office in the year 2000 and have been running the performance method ever since. Nothing fancy. Reports that pass, delivered when I say they will.

YEARS
0+
REPORTS
0+
CODE CYCLES
0
FOCUS
one
Looking up through mature Ponderosa pines toward an overcast sky
FIELDPLACERVILLENORCAL

FIG. 01 · CANOPY · FOOTHILL PINE

THE STORY · IN HER WORDS

How one practice, on one method, happened.

I learned Title 24 sitting next to a structural engineer. In the year 2000 I took a desk in his office and did energy reports alongside his framing plans. He’d hand me a set, I’d run the calcs, we’d staple it all together and send it out. Residential, mostly. Small additions, new single-family, the occasional duplex. That was the rhythm for years.

Somewhere around the third code cycle I noticed the performance method was doing better by our clients than the prescriptive path. More flexibility in the envelope, fewer forced trade-offs, reports that passed on the first try. The software was faster than people gave it credit for; the reputation for being complicated mostly belonged to people who didn’t use it every day.

So I went solo, kept the focus narrow (residential, performance method, California), and I’ve been at it ever since. Thirty-plus years. Hundreds of reports. Seven code cycles, including the continuing education I just finished for 2025. A practice doesn’t need to be big to be good. It needs to be clear about what it is.

Bo

FIELD NOTE · 002

The performance method was never the complicated one. It was the freer one.
BO KELLETT

CODE CYCLES · 2005 / 2025

Every cycle, new classes.

The California Energy Code updates on a three-year rhythm. Each time, I sit for the continuing education and re-qualify on the new software build. Below: what changed, and what I studied.

2005

Building envelope tightens

Early prescriptive tables give way to whole-building modeling. Classes: envelope revisions, duct sealing.

01/7

2008

Cool roofs, better windows

Low-e glazing and radiant barriers move from option to default. Classes: glazing U-factor, SHGC.

02/7

2013

HERS verification expands

Third-party field verification gets real teeth. Classes: HERS protocols, QII introduction.

03/7

2016

Path to zero net energy

Time-dependent valuation arrives. Classes: TDV modeling, high-performance walls.

04/7

2019

Solar PV required

New low-rise residential requires on-site solar. Classes: PV sizing, battery storage.

05/7

2022

Heat pumps favored

Electrification incentives reshape compliance margins. Classes: heat pump water heaters, induction cooking.

06/7

2025CURRENT

Heat pumps prescriptive. HERS becomes ECC.

Classes completed.

07/7

TOOLS · KIT

What I work with.

Three things, used well. The software, the registry, and the map of California you have to keep in your head.

MODELING

EnergyPro

Whole-building performance method. CF1R output, approved by CEC.

REGISTRY

CHEERS

Registered provider. Reports logged to the state registry at delivery.

GEOGRAPHY

16 Climate Zones

Coastal to desert. Each zone has its own budget.

SEE ALL 16 ZONES →

SERVICE AREA · CA · ALL 16

All of California. All sixteen climate zones.

From Zone 1 on the coastal north to Zone 15 in the desert. Each zone has its own budget and its own temperament. I don’t care where the project sits. The software doesn’t either.

HONEST POSITIONING

What I don’t do.

A narrow practice stays sharp. These jobs need different software and different expertise, and I’d rather you hire someone who does them every day.

MULTIFAMILY (5+ UNITS)

Different software, different code path. There are good people who do only this, and I refer.

POOL & SPA

Separate APSP-15 compliance, separate calculators. Not my table.

COMMERCIAL

Nonresidential performance is its own world. I keep my focus narrow on purpose.

NEXT · START A PROJECT

Send me the plans. I’ll send a report.

Flat $300. 1–3 business days. Residential only. 2025 California Energy Code.

PRINCIPAL

Bo Kellett

CF1R · PERFORMANCE METHOD · CA STATEWIDE

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