EVIDENCE & METHODS
Useful information starts
with a traceable source.
The technical library links to public primary references. The interactive assistant also uses the existing official-source retrieval collection and documented U.S.-market equipment records. Published explainers remain secondary educational content.
ORIGINAL SNAPSHOT ANALYSIS · PUBLISHED NOVEMBER 9, 2026
305,650 U.S.-market catalog records are not 305,650 distinct products.
Our November 2, 2026 snapshot contains 305,650 records whose upstream markets field includes United States. Of those, 283,009 are heat-pump records, but they represent 12,102 exact brand/outdoor-model text pairs. Different indoor combinations can produce separate records. Catalog row counts therefore cannot be used as a count of installed units, product sales or market share.
| Recorded category | Records |
|---|---|
| boiler | 657 |
| furnace | 3,728 |
| geothermal heat pump | 4,892 |
| heat pump | 283,009 |
| light commercial hvac | 12,668 |
| room air conditioner | 577 |
| smart thermostat | 119 |
The complete catalog includes 12,668 light-commercial records. They are shown separately, not represented as residential systems. The residential decision guides do not infer home suitability from inclusion in the catalog.
Field availability is a reason to verify, not a fit score.
Among the 283,009 heat-pump rows, 283,009 contain a non-null SEER2 value, 282,189 contain a non-null 5°F heating-capacity value and 283,001 have a nonblank AHRI-reference field. These are presence checks on the stored fields, not checks of current certification or engineering validity.
What this changes in a purchase conversation
Ask for the exact indoor/outdoor combination and manufacturer performance at your local design conditions. A directory with many matching rows can help identify candidates, but it does not replace a load calculation, demonstrate stock or establish an installed price. A missing value means that this snapshot does not answer that question; it is not evidence that the physical equipment lacks the capability.
Reproduce the scope
The filter matches the existing equipment-search rule: the stored JSON markets field must contain United States. Counts group by the stored category. Brand/outdoor pairs are counted as exact text pairs within the heat-pump category; no manufacturer-identity reconciliation is claimed. No customer, contact, chat or installation data is involved. This is a dated snapshot, not a complete live survey of all products sold in the United States.
Download category counts (CSV) · Download methodology and source snapshot metadata (JSON)
- ENERGY STAR Certified Room Air Conditioners · Retrieved 2026-11-02
- ENERGY STAR Certified Boilers · Retrieved 2026-11-02
- ENERGY STAR Certified Smart Thermostats · Retrieved 2026-11-02
- ENERGY STAR Certified Heat Pumps · Retrieved 2026-11-02
- ENERGY STAR Certified Geothermal Heat Pumps · Retrieved 2026-11-02
- ENERGY STAR Certified Light Commercial HVAC · Retrieved 2026-11-02
- ENERGY STAR Certified Furnaces · Retrieved 2026-11-02
Source register
The links below were checked on 2026-11-09. Dates on linked documents may be older; access does not establish that every historical statement remains current. Each article identifies the references relevant to its scope.
- PNNL Building America — Air Conditioning
- ENERGY STAR — Maintenance Checklist
- PNNL — Pre-Retrofit Assessment of Existing HVAC Systems
- PNNL — Traditional Split Heat Pumps
- DOE Building Science Education / CEE — You Installed an Air Source Heat Pump. Now What?
- PNNL — Ductless Mini-Split Heat Pumps
- PNNL — Ducted Returns
- PNNL — Attic Air Sealing and Insulation Checklist
- DOE Building Science Education — Programmable Thermostats
- PNNL — Pre-Retrofit Assessment of Attics, Ceilings and Roofs
- U.S. DOE — Home Energy Rebates Program
- ENERGY STAR — HVAC Quality Installation
- ENERGY STAR — Tips for Hiring a Heating and Cooling Contractor
- ENERGY STAR — Duct Sealing
- ENERGY STAR — Professional Duct Improvement
- ENERGY STAR — Heat Pump Equipment Key Product Criteria
- ENERGY STAR — Clean Heating and Cooling
- U.S. EPA — Care for Your Air
- U.S. EPA — Air Cleaners and Air Filters in the Home
- U.S. EPA — HFC Phasedown: Homeowner Questions
- U.S. EPA — Stationary Refrigeration Resources for Homeowners
- IRS — Energy Credit Termination Dates, Public Law 119-21
- IRS — Instructions for Form 5695 (2025)
- U.S. EIA — Electricity Prices and Factors Affecting Prices
- AHRI — Directory of Certified Product Performance
- ACCA — Manual J Residential Load Calculation
- PNNL — Cold Climate Heat Pump Sizing and Selection
- PNNL — Heat Pump Quality Installation and Commissioning
- PNNL — Whole-House Dehumidification
- PNNL — HVAC Condensate Drain Pan
- ACCA — Manual S Residential Equipment Selection
- U.S. EIA — Degree Days
Cooling-cost scenario
Existing cooling kWh = annual household kWh × cooling share. For comparable ratings and constant cooling output, proposed cooling kWh = existing cooling kWh × old efficiency / new efficiency. Annual savings = the kWh difference × the stated electricity rate. Positive simple payback = incremental cost / positive annual savings.
Cooling share can be an assumption rather than a measurement. The model excludes heat-pump heating, fuel switching, financing, maintenance, changing weather, behavior and future tariffs. SEER and SEER2 are not silently mixed.
Heating examples
Using 3,412 Btu per kWh and 100,000 Btu per therm, illustrative electricity cost per million Btu delivered is about 293.1 × electricity price / COP. Illustrative gas cost is 10 × price per therm / furnace efficiency. These examples do not estimate a full season or determine a personal tariff.
Equipment records
Public certification and catalog records describe model combinations and documented ratings. They are not a local quote, stock check, current warranty determination, dealer authorization or Manual J/S/D design. Confirm the exact components and current manufacturer information before purchase.
Current incentives
Use the linked IRS termination guidance for the current federal date rules, and verify state and utility program administration separately. Do not assume an old tax credit or an unapproved rebate reduces a 2026 installed price.
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