Energy costs · source-first guide
Lower bills start with the building, the equipment you already own, and the problem you can document. A product belongs near the end of the process, not at the beginning.
Start with the free stepsENERGY STAR describes its Home Upgrade as a set of six high-impact efficiency improvements designed to work together. It also says households can choose the improvements that make sense and implement them at their own pace. That makes the set a planning framework — not a rule that every home needs six purchases.
The broader Energy Savings at Home guidance groups advice around sealing and insulation, heating and cooling, products, projects, and available incentives. The free public tools let you compare certified models and search nearby offers. Neither tool can calculate your home's actual payback.
A conservative sequence
Measure the bill → identify the building or equipment problem → use no-cost controls and maintenance → plan envelope work and replacement timing → compare qualified models → verify incentives → obtain properly scoped quotes. Skip any step that does not apply.
These are ENERGY STAR's six categories. The cautions are ours: each purchase still has to fit the home, the lease, the replacement schedule, and the full installed cost.
Home Upgrade 1
ENERGY STAR places certified heat pumps in this category. This is a replacement project, not a first purchase: condition, climate, ductwork, electrical capacity, sizing, and installation all affect the result.
Home Upgrade 2
Air sealing and insulation address the building before asking new equipment to compensate for leaks. Combustion safety, moisture, wiring, and inaccessible areas can make professional assessment appropriate.
Home Upgrade 3
The Home Upgrade highlights heat-pump water heaters. Tank size, installation location, air volume, condensate drainage, electrical service, and household demand belong in the decision.
Home Upgrade 4
Windows are one option in the set, not proof that full replacement is the first or best use of money. Identify the actual leak, damage, comfort, or replacement need before requesting quotes.
Home Upgrade 5
Controls can reduce waste only when they are compatible with the system and used appropriately. A new thermostat cannot repair failing equipment, poor ductwork, or an unsealed building.
Home Upgrade 6
Planning for future electric appliances or an EV charger may involve the panel, circuits, space, and service capacity. That is electrical planning for an owner and a licensed professional, not a renter DIY task.
A free step can reveal that the problem is a rate change, deferred maintenance, a broken control, or a lease issue rather than inefficient equipment.
Write down energy use, not only the dollar total. Rates and fees can change even when consumption does not. Mark moves, vacancies, extreme weather, equipment problems, and major schedule changes so a one-month spike does not become a shopping list.
Drafty room, failed water heater, high summer use, uneven temperatures, or an old appliance are different problems. A product finder helps compare eligible products; it does not diagnose the house.
Check existing thermostat schedules, keep supply and return vents unobstructed, follow the equipment manual for filter maintenance, and report broken seals, fans, or controls. These steps cost nothing unless a repair is actually needed.
Search official offers by ZIP code, then verify eligibility, dates, participating contractors, required model numbers, and whether approval must happen before purchase. A search result is not a guaranteed payment.
If you buy an appliance you will keep, the Product Finder can compare certified models. If the property owner owns it, make the documented problem the request — not a demand for a particular product.
Ownership gives you authority to change the building; it does not make every project suitable for DIY. Combustion, refrigerant, structural, electrical, and complex moisture work belong with qualified professionals.
These are free U.S. government tools. There are no affiliate links on this page.
1 · Plan
Understand the six project categories and decide which, if any, matches a documented need.
Open Home Upgrade2 · Compare
Compare ENERGY STAR certified products after you know the category, fit, and replacement need.
Open Product Finder3 · Verify
Search by ZIP code, then confirm every condition with the program before signing or buying.
Open Rebate FinderFor heating and cooling, ENERGY STAR says bigger is not always better and directs buyers to have the contractor verify size with a Manual J heating-and-cooling load calculation. Oversized conventional equipment can cycle frequently, reduce comfort, and operate inefficiently. A model comparison cannot replace that calculation.
A heat-pump water heater also has installation constraints: tank size, surrounding air, condensate drainage, location, and electrical service. The correct model is the one that fits both household demand and the installation site.
Ask quotes to state the proposed size, calculation or assumptions, included electrical or duct work, permits, commissioning, warranty, maintenance, and incentive paperwork. The lowest equipment price is not necessarily the lowest installed ownership cost.
Stop and use a qualified professional when the project involves combustion equipment, refrigerant, electrical service, structural changes, or unresolved moisture. Contact the utility if the meter, rate, or bill itself appears wrong.
Start with your utility bills, note when usage changes, and identify the problem you are trying to solve: drafts, equipment failure, comfort, or unusually high consumption. Use the ENERGY STAR Home Upgrade as a planning map, then check the official Product Finder and Rebate Finder only when a purchase is actually due.
Renters can use its logic without taking on permanent work: document drafts or maintenance problems, use existing controls and schedules, keep vents clear, and ask the property owner about repairs. Do not alter wiring, plumbing, HVAC equipment, insulation, or windows without written permission.
No. Certification identifies products that meet ENERGY STAR efficiency specifications, but it does not establish your purchase price, local energy rate, installation cost, maintenance cost, usage, rebate eligibility, or payback period.
Heating and cooling equipment should be sized for the home rather than selected by nameplate size alone. ENERGY STAR tells buyers to ask an HVAC contractor for a Manual J calculation. Heat-pump water heaters also require checks for tank size, surrounding air space, drainage, electrical service, and installation requirements.
Not automatically. ENERGY STAR describes the Home Upgrade as six improvements designed to work together and says households can choose what makes sense and proceed at their own pace. The right order depends on the building, climate, equipment condition, budget, and who has authority to make changes.
Last reviewed July 25, 2026. U.S.-focused educational information. Prices, energy rates, incentives, equipment condition, lease rights, and contractor requirements vary. No affiliate links appear on this page.
One problem, one free step, and one honest buying decision each week.