EnergyWorksEquipment Desk
SCAQMD Rule 1146.2 · Existing buildings

Find the date each water heater and boiler has to go zero-emission.

South Coast AQMD now sets a replacement date for gas water heaters, boilers and pool heaters up to 2,000,000 Btu/hr. Each unit's date depends on its type, its rated input and its age. Enter one from the nameplate and see when it comes due.

Jan 1, 2029Phase I: smaller water heaters, boilers and pool heaters
Jan 1, 2031Phase II: larger tankless and all Type 2 units
Jan 1, 2033Phase III: high-temperature units
Unit deadline
Example A 750,000 Btu/hr boiler built in 2009. Replace these values with your nameplate's.
Dates are for units in existing buildings. New construction follows separate requirements in the rule.
How the date is set

A phase date, an age limit, and whichever comes later

Each unit falls into a phase. Once the phase date arrives, a unit older than its age limit must be replaced with a zero-emission unit. A younger unit gets until the January it reaches that age.

PhasePhase dateUnitsAge limit
Phase IJan 1, 2029Type 1 storage water heaters (75,000 Btu/hr and up), boilers and pool heaters*, up to 400,000 Btu/hr15 years
Phase IJan 1, 2029Tankless water heaters up to 200,000 Btu/hr25 years
Phase IIJan 1, 2031Tankless water heaters over 200,000 Btu/hr, and all Type 2 units (over 400,000 up to 2,000,000 Btu/hr)25 years
Phase IIIJan 1, 2033High-temperature units25 years
Rule 1146.2 services

An inventory, a calendar, and a plan if you need one

SCAQMD filing fees are passed through at cost.

ServiceWhat's includedPrice
1146.2 Fleet SnapshotInventory from nameplate photos, each unit's deadline, exemption and plan options, and a replacement calendar for the whole building or portfolio$1,500 up to 10 units
+$95 per extra unit
Compliance Plan PrepFor owners with five or more units coming due close together: we prepare the Alternative Compliance Plan from your inventory and file it with SCAQMD at least a year ahead of the earliest due date$2,500 + SCAQMD fees
Deadline MonitorYour unit list and dates kept current for the year as units are replaced or added, with notice ahead of each due date and of any rule change that moves one$1,200 / yr
up to 25 units

These are inventory, scheduling and filing services. Replacement equipment selection, sizing and design stay with your licensed engineer or mechanical contractor.

SCAQMD permits · Emergency engines

Keep the emergency generator's permit, hours and records in order.

A standby generator that only runs for outages and testing still needs an air permit, an hour log, fuel records and a renewal every year. Inspectors ask for the logs first. We keep them ready.

50 bhpEngines larger than this need a SCAQMD permit
200 hrsAnnual cap on all operation, emergency and testing
36 moRecords kept, the most recent 24 on site
Hours check
The limit depends on the engine's particulate rating and is written on its permit.
Example 14 outage hours and 31 testing hours on a 50-hour engine.
Hours are usually counted per calendar year. Check the conditions on your permit.
What the permit requires

Six things an inspector will check

Permit

A permit for engines over 50 bhp

Diesel and gas emergency engines larger than 50 brake horsepower need a SCAQMD permit to operate, issued to the site and the specific engine.

Hours

200 hours a year, total

Emergency running, testing and maintenance together stay under 200 hours a year. A non-resettable hour meter is the record.

Testing

A tighter testing limit

Testing and maintenance hours are capped between 20 and 100 a year, depending on the engine's particulate rating.

Logs

Monthly logs, split by reason

Hours each month recorded separately for emergency use, testing and maintenance, with fuel purchase or delivery records alongside.

Records

36 months kept, 24 on site

Three years of logs and fuel records, with the most recent two years available at the site for inspection.

Renewal

Renew every year

The permit renews annually with a SCAQMD fee, about $583.73 per emergency engine for fiscal year 2026–27.

Penalties add up fast. Under state law, operating without a permit or outside its conditions can bring penalties of thousands of dollars per violation, per day.

Generator services

Per generator, per year

SCAQMD permit and renewal fees are passed through at cost.

ServiceWhat's includedPrice
Permit DeskMonthly hour and fuel logs kept by reason, hour tracking against the 200-hour cap and the testing limit, records filed for the 36-month window, and the annual renewal handled$900 / generator / yr
minimum $1,500 / site
Catch-up Records BinderFor a site with missing or scattered logs: we rebuild the record from meter readings, service tickets and fuel invoices into one binder ready for inspection$600 / generator
New-Unit Permit PackagePermit application paperwork for a new or unpermitted engine, assembled from the manufacturer's data and filed with SCAQMD$1,500 certified engine
$2,500 standard
+ SCAQMD fees

We handle permit paperwork, logs and records. We don't select, size or design generators or their installations.

Questions

Common questions

Does Rule 1146.2 cover my building?

It covers gas-fired water heaters, boilers and pool heaters up to 2,000,000 Btu/hr in the South Coast AQMD area. Residential buildings with four or fewer units are exempt, and water heaters under 75,000 Btu/hr fall under Rule 1121. The calculator above sorts a unit in a few seconds.

What if I don't know when a unit was built?

The serial number usually encodes the manufacture date. Send us a photo of the nameplate. If the age can't be established, the rule treats the unit as already past its age limit, so it comes due on its phase date.

When does an Alternative Compliance Plan make sense?

When five or more units come due within two consecutive calendar years, replacing them all at once can be impractical. The plan lets you spread the work, but it must be filed at least a year before the earliest due date. The Fleet Snapshot shows whether you qualify.

Will you pick the replacement equipment?

No. We tell you which units come due and when, and what paperwork goes with them. Choosing and sizing replacement equipment is engineering work for your licensed engineer or contractor.

Our generator logs are behind. Can they be fixed?

Usually. The Catch-up Records Binder rebuilds the record from the hour meter, service tickets and fuel invoices, then the Permit Desk keeps it current from there.

Contact

Send a unit list or nameplate photos

Include the building address and what you have: nameplate photos, an equipment list or a generator permit number. We'll reply with the deadlines we can see and a price.

danny@energyworks.works

EnergyWorks · 21213 Hawthorne Blvd, Ste B #1046, Torrance, CA 90503