Sources we monitor
We check these sources weekly and update affected pages when they change.
40 sources: 30 agencies, standards bodies and licensing boards, plus 10 local utilities. Registry last reviewed Oct 2, 2026. A scheduled job checks every source each week: by API where one exists, by RSS feed, or by comparing the page's text with the last check. Sites that block automated checks go on a weekly hand-check checklist, and say so below.
Federal regulators and data
- EPA Technology Transitions (AIM Act HFC) (opens in a new tab)www.epa.gov/hfcs/technology-transitions-hfc-restrictions-sector
- TYPE
- Federal
- WHAT WE PULL
- GWP limits and compliance dates by sector (R-410A to A2L), reconsideration rule status
- HOW OFTEN IT CHANGES
- Irregular; the sector table was last updated Aug 28, 2026
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
- EPA Section 608 (opens in a new tab)www.epa.gov/section608
- TYPE
- Federal
- WHAT WE PULL
- Technician certification, refrigerant sales and handling, leak-repair rules
- HOW OFTEN IT CHANGES
- Rare
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
- ENERGY STAR (EPA/DOE) (opens in a new tab)www.energystar.gov/
- TYPE
- Federal
- WHAT WE PULL
- Certified central AC and air-source heat pump lists, Most Efficient lists, spec changes
- HOW OFTEN IT CHANGES
- Product data daily to weekly; specs every few years
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
- DOE Appliance & Equipment Standards Program (opens in a new tab)www.energy.gov/cmei/buildings/appliance-and-equipment-standards-program
- TYPE
- Federal
- WHAT WE PULL
- SEER2, EER2 and HSPF2 minimums, regional standards, furnace rules, test procedures
- HOW OFTEN IT CHANGES
- Rulemakings irregular; eCFR updates daily
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
- DOE Building Technologies Office / Building Energy Codes Program (opens in a new tab)www.energy.gov/cmei/buildings/building-technologies-office
- TYPE
- Federal
- WHAT WE PULL
- Heat pump R&D, state energy-code adoption status (IECC)
- HOW OFTEN IT CHANGES
- Monthly to quarterly
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National, all states
- EIA Electric Power Monthly (opens in a new tab)www.eia.gov/electricity/monthly/epm_table_grapher.php?t=epmt_5_6_a
- TYPE
- Federal
- WHAT WE PULL
- Residential electricity price (cents per kWh) by state, monthly
- HOW OFTEN IT CHANGES
- Monthly, about a two-month lag
- HOW OFTEN WE CHECK
- Weekly, via API
- MARKETS
- AZ, WA, TX, FL, OH, national
- BLS Occupational Outlook Handbook + OEWS (SOC 49-9021) (opens in a new tab)www.bls.gov/ooh/installation-maintenance-and-repair/heating-air-conditioning-and-refrigeration-mechanics-and-installers.htm
- TYPE
- Federal
- WHAT WE PULL
- Median pay, employment, 10-year projection; metro wages
- HOW OFTEN IT CHANGES
- Annual
- HOW OFTEN WE CHECK
- Weekly, via API
- MARKETS
- National + 5 metros
- NOAA / NWS (CPC, NCEI, NWS API) (opens in a new tab)www.ncei.noaa.gov/access/us-climate-normals/
- TYPE
- Federal
- WHAT WE PULL
- Weekly and monthly degree days, seasonal outlooks, 1991–2020 normals, heat advisories
- HOW OFTEN IT CHANGES
- Degree days weekly; outlooks monthly; normals per decade
- HOW OFTEN WE CHECK
- Weekly, via API
- MARKETS
- All
- IRS: Energy Efficient Home Improvement Credit (25C) (opens in a new tab)www.irs.gov/credits-deductions/energy-efficient-home-improvement-credit
- TYPE
- Federal
- WHAT WE PULL
- Credit status and expiry wording
- HOW OFTEN IT CHANGES
- Page last updated Apr 28, 2026
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
- Federal Register API (opens in a new tab)www.federalregister.gov/developers/documentation/api/v1
- TYPE
- Federal
- WHAT WE PULL
- New EPA, DOE and FTC rules, proposed rules, comment deadlines
- HOW OFTEN IT CHANGES
- Daily (business days)
- HOW OFTEN WE CHECK
- Weekly, via API
- MARKETS
- National
- CPSC Recalls (opens in a new tab)www.cpsc.gov/Recalls
- TYPE
- Federal
- WHAT WE PULL
- Recalls of furnaces, heaters, dehumidifiers, thermostats and CO alarms
- HOW OFTEN IT CHANGES
- Weekly (several per week)
- HOW OFTEN WE CHECK
- Weekly, via RSS feed (new items flagged)
- MARKETS
- National
- FTC Energy Labeling Rule (EnergyGuide) (opens in a new tab)www.ftc.gov/legal-library/browse/rules/energy-water-use-labeling-consumer-products-under-energy-policy-conservation-act-energy-labeling
- TYPE
- Federal
- WHAT WE PULL
- EnergyGuide label requirements for central AC, heat pumps and furnaces
- HOW OFTEN IT CHANGES
- Rare
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
- Census American Housing Survey (opens in a new tab)www.census.gov/programs-surveys/ahs.html
- TYPE
- Federal
- WHAT WE PULL
- Main heating fuel, AC presence, equipment age
- HOW OFTEN IT CHANGES
- Periodic survey releases
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National; metro coverage not yet verified
- AirNow (EPA) (opens in a new tab)www.airnow.gov/
- TYPE
- Federal
- WHAT WE PULL
- AQI and wildfire smoke for filter and indoor-air stories
- HOW OFTEN IT CHANGES
- Hourly
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Seattle–Tacoma and Phoenix especially; all
- NOAA National Hurricane Center + Ready.gov (opens in a new tab)www.nhc.noaa.gov/
- TYPE
- Federal
- WHAT WE PULL
- Active storms, prep guidance (generator and HVAC protection)
- HOW OFTEN IT CHANGES
- Real-time while storms are active
- HOW OFTEN WE CHECK
- Weekly, via RSS feed (new items flagged)
- MARKETS
- Jacksonville (and Austin for Gulf remnants)
Standards and industry bodies
- TYPE
- Standards
- WHAT WE PULL
- Shipment data, certified ratings, refrigerant-transition statements
- HOW OFTEN IT CHANGES
- Shipments monthly; directory continuous
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
- ACCA (Manual J/S/D) (opens in a new tab)www.acca.org/standards
- TYPE
- Standards
- WHAT WE PULL
- Load calculation, sizing and duct standards, quality-install standard
- HOW OFTEN IT CHANGES
- Editions every few years
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
- ASHRAE (opens in a new tab)www.ashrae.org/technical-resources/standards-and-guidelines
- TYPE
- Standards
- WHAT WE PULL
- Standard 62.2 ventilation, 15/34 refrigerant safety, climate zones
- HOW OFTEN IT CHANGES
- Continuous maintenance; addenda published online
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
- NATE (opens in a new tab)natex.org/
- TYPE
- Standards
- WHAT WE PULL
- Technician certification types and requirements
- HOW OFTEN IT CHANGES
- Rare
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
- ICC (IMC / IECC) (opens in a new tab)www.iccsafe.org/
- TYPE
- Standards
- WHAT WE PULL
- Model mechanical and energy code text and editions
- HOW OFTEN IT CHANGES
- New editions periodically
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National; local adoption varies
- UL Solutions (opens in a new tab)www.ul.com/news
- TYPE
- Standards
- WHAT WE PULL
- UL 60335-2-40 (A2L equipment safety), product safety notices
- HOW OFTEN IT CHANGES
- Irregular
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
- NEEP Cold Climate ASHP List (opens in a new tab)ashp.neep.org/
- TYPE
- Standards
- WHAT WE PULL
- Cold-climate heat pump models and their performance data
- HOW OFTEN IT CHANGES
- Continuous
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Seattle–Tacoma, Columbus, OH
- DSIRE (NC State) (opens in a new tab)dsireusa.org/
- TYPE
- Standards
- WHAT WE PULL
- State and utility incentive programs by state
- HOW OFTEN IT CHANGES
- Continuous
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- All 5 states
- HARDI (opens in a new tab)hardinet.org/news
- TYPE
- Standards
- WHAT WE PULL
- Distributor sales trends, A2L supply and policy updates
- HOW OFTEN IT CHANGES
- Monthly
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- National
State licensing and energy offices
- Arizona Registrar of Contractors (opens in a new tab)azroc.my.site.com/AZRoc/s/contractor-search
- TYPE
- State
- WHAT WE PULL
- License classes, consumer advisories, license lookup
- HOW OFTEN IT CHANGES
- Irregular
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Phoenix
- Washington L&I contractor licensing (opens in a new tab)lni.wa.gov/licensing-permits/contractors/hiring-a-contractor/verify-contractor-tradesperson-business
- TYPE
- State
- WHAT WE PULL
- Contractor registration, HVAC/refrigeration (06A) electrician rules
- HOW OFTEN IT CHANGES
- Irregular
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Seattle–Tacoma
- WA Department of Commerce, Energy Office (HEAR) (opens in a new tab)www.commerce.wa.gov/energy/clean-buildings/energy-incentives/hear/
- TYPE
- State
- WHAT WE PULL
- HEAR and HOMES rebate status, local administrators
- HOW OFTEN IT CHANGES
- Frequent
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Seattle–Tacoma
- Texas TDLR: Air Conditioning & Refrigeration Contractors (opens in a new tab)www.tdlr.texas.gov/acr/
- TYPE
- State
- WHAT WE PULL
- ACR license rules, rule changes, enforcement
- HOW OFTEN IT CHANGES
- Irregular
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Austin
- Florida DBPR: Construction Industry Licensing Board (opens in a new tab)www2.myfloridalicense.com/construction-industry/
- TYPE
- State
- WHAT WE PULL
- Class A/B AC and mechanical licensing, board meetings
- HOW OFTEN IT CHANGES
- Monthly (board)
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Jacksonville
- Ohio Construction Industry Licensing Board (opens in a new tab)com.ohio.gov/divisions-and-programs/industrial-compliance/boards/ohio-construction-industry-licensing-board
- TYPE
- State
- WHAT WE PULL
- HVAC contractor license rules, exam and renewal changes
- HOW OFTEN IT CHANGES
- Irregular
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Columbus, OH
Utilities
- APS (opens in a new tab)www.aps.com/en/residential/home
- TYPE
- Utility
- WHAT WE PULL
- Rates, thermostat and HVAC offers, Cool Rewards
- HOW OFTEN IT CHANGES
- Seasonal
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Phoenix
- SRP (opens in a new tab)www.srpnet.com/energy-savings-rebates/home/rebates/air-conditioner
- TYPE
- Utility
- WHAT WE PULL
- Residential AC rebate page (checked by hand)
- HOW OFTEN IT CHANGES
- Program year
- HOW OFTEN WE CHECK
- Manual check (the site blocks automated checks)
- MARKETS
- Phoenix
- Puget Sound Energy (opens in a new tab)www.pse.com/en/rebates
- TYPE
- Utility
- WHAT WE PULL
- Heat pump rebates, gas and electric rates
- HOW OFTEN IT CHANGES
- Program year
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Seattle–Tacoma
- Tacoma Power (opens in a new tab)www.mytpu.org/ways-to-save/for-my-home/heating-cooling/heat-pump/
- TYPE
- Utility
- WHAT WE PULL
- Heat pump rebates; HEAR (City of Tacoma is a local administrator, per the WA Commerce HEAR page)
- HOW OFTEN IT CHANGES
- Program year
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Seattle–Tacoma
- Seattle City Light (opens in a new tab)www.seattle.gov/city-light/residential-services/home-energy-solutions
- TYPE
- Utility
- WHAT WE PULL
- Heat pump rebates, rates
- HOW OFTEN IT CHANGES
- Program year
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Seattle–Tacoma
- Snohomish County PUD (opens in a new tab)www.snopud.com/save-energy/residential/rebates/
- TYPE
- Utility
- WHAT WE PULL
- Residential rebates
- HOW OFTEN IT CHANGES
- Program year
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Seattle–Tacoma
- Austin Energy (opens in a new tab)austinenergy.com/en/energy-efficiency/rebates-incentives/residential
- TYPE
- Utility
- WHAT WE PULL
- AC and heat pump rebates, rates
- HOW OFTEN IT CHANGES
- Program year (October fiscal year)
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Austin
- JEA (opens in a new tab)www.jea.com/residential_customers/residential_rebates/heating_and_cooling_rebates/
- TYPE
- Utility
- WHAT WE PULL
- Residential heating and cooling rebate page (checked by hand)
- HOW OFTEN IT CHANGES
- Program year
- HOW OFTEN WE CHECK
- Manual check (the site blocks automated checks)
- MARKETS
- Jacksonville
- Ohio Power Company (formerly AEP Ohio) (opens in a new tab)www.aepohio.com/savings/
- TYPE
- Utility
- WHAT WE PULL
- Efficiency programs, smart thermostat discount; renamed Ohio Power Company Oct 1, 2026
- HOW OFTEN IT CHANGES
- Program year
- HOW OFTEN WE CHECK
- Manual check (the site blocks automated checks)
- MARKETS
- Columbus, OH
- Columbia Gas of Ohio (opens in a new tab)www.columbiagasohio.com/ways-to-save
- TYPE
- Utility
- WHAT WE PULL
- Weatherization and WarmChoice programs
- HOW OFTEN IT CHANGES
- Program year
- HOW OFTEN WE CHECK
- Weekly, automated page check (content hash compared)
- MARKETS
- Columbus, OH