HVAC & Energy
HVAC replacement, water heaters, insulation, electrical panels, solar
Heating, cooling, hot water, insulation and electrical service are the systems you only think about when they fail — and then you're making a five-figure decision in a hurry. This category exists to make that decision in advance. It covers furnace and AC replacement, heat pumps and the electrification trade-off, tankless versus tank water heaters, attic insulation and air sealing, panel upgrades from 100 to 200 amps, and solar with the federal credit factored in.
Energy work is unusual in that the cost has a payback attached to it. Insulation and air sealing routinely pay for themselves in a handful of years; a heat pump swap depends heavily on local electricity and gas prices; solar depends on your rate structure and how long you'll stay. Our guides show the payback math rather than just the sticker price, and the energy savings and solar calculators let you run your own numbers before a salesperson runs them for you.
This section currently holds 37 in-depth guides, 2 free calculators and 5 state-by-state cost reports. Everything is free to read, with no signup and no paywall.
Latest in HVAC & Energy
Recently published & updated guides
Electric vs. Gas Appliances in 2026: The Real Cost of Going All-Electric
A homeowner's 2026 breakdown of electric vs. gas appliances — upfront and running costs for stoves, dryers, and water heaters, the electrification incentives, panel impacts, and what makes sense.
Backup Generator vs. Home Battery in 2026: Which Should a Homeowner Buy?
A practical 2026 comparison of standby generators and home battery systems for power backup — upfront cost, running cost, runtime, maintenance, incentives, and which fits your situation.
Weatherization & IRA Rebates in 2026: How to Get Paid to Make Your Home Efficient
A plain-English guide to weatherization money in 2026: why the 25C tax credit is gone, how the state-run IRA rebate programs actually work, and who qualifies for free weatherization.
What It Really Costs to Charge an EV at Home in 2026
Beyond the charger install — the monthly electricity cost of charging an EV at home in 2026, how it compares to gas, the panel and rate questions, and how it affects your utility bill.
Calculators
Cost Guides
How Much Does a HVAC Replacement Cost?
View national & state-by-state pricing →
How Much Does a Water Heater Replacement Cost?
View national & state-by-state pricing →
How Much Does a Home Insulation Cost?
View national & state-by-state pricing →
How Much Does a Electrical Panel Upgrade Cost?
View national & state-by-state pricing →
How Much Does a Solar Panel Installation Cost?
View national & state-by-state pricing →
More Guides
How to Save Money on HVAC Replacement (Without Sacrificing Comfort)
HVAC replacement costs $5,000-$15,000+. Learn how to cut those costs with off-season timing, rebates, tax credits, and smart system selection.
How to Save Money on Home Insulation (And Still Cut Energy Bills)
Home insulation costs $1,500-$5,000+ but can be done for much less. Learn DIY strategies, tax credits, and smart prioritization to insulate effectively on a budget.
Spray Foam vs Blown-In Insulation: Cost & Performance Comparison
Compare spray foam and blown-in insulation by R-value, cost per square foot, moisture resistance, air sealing, and best applications for your home in 2026.
Electric vs Gas Water Heater: Cost, Efficiency & Running Costs
Compare electric and gas water heaters on purchase price, monthly operating cost, efficiency, lifespan, and installation requirements to find the best option for your home.
Central AC vs Mini Split: Cost, Efficiency & Best Choice for Your Home
Comparing central air conditioning vs ductless mini split systems — installation cost, operating costs, SEER ratings, zoning benefits, and which system is best for different types of homes.
Tank vs Tankless Water Heater: Cost, Efficiency & Savings Breakdown
Tank vs tankless water heater comparison — upfront costs, energy savings (8-34% for tankless), lifespan, space requirements, flow rate limits, and total cost of ownership over 15 years.
Solar Panel Cost in 2026: Installation Prices, Tax Credits & ROI Calculator
Learn how much solar panels cost in 2026, including installation prices per watt, why the federal tax credit no longer applies, what state incentives remain, and how to calculate your payback period.
HVAC Replacement Cost 2026: What to Expect for a New System
Find out how much it costs to replace your HVAC system in 2026, including breakdowns by component, SEER ratings, financing options, and when to repair vs replace.
Solar Lease Cost vs Buying 2026: Lease vs Buy Solar Panels
Solar lease cost vs buying compared for 2026 — real monthly lease payments ($50–$150/mo), 25-year cost projections, what the expired federal tax credit changes, and which option saves more.
Propane vs Natural Gas: Cost, Efficiency & Which Is Better for Your Home
Comparing propane and natural gas for home heating — real fuel costs, BTU efficiency, installation expenses, safety records, and which fuel type suits your home best.
EV Charger Installation Cost 2026: Level 1 vs Level 2 vs Level 3
Find out exactly what it costs to install an EV charger at home in 2026. Compare Level 1, Level 2, and Level 3 options — and why the federal §30C credit no longer applies.
Heat Pump vs Furnace: Cost, Efficiency & Which Heats Better in 2026
Heat pump vs furnace compared side-by-side: installation cost, efficiency ratings, operating costs, and which one actually works better for your climate.
Energy Efficiency Tax Credits & Rebates 2026: What Ended and What's Left
The federal energy tax credits ended after 2025 — §25C, §25D and the EV charger credit. What each one covered, who can still claim one, and what rebates are left in 2026.
Air Duct Cleaning Cost 2026: Is It Worth It? What Experts Say
Air duct cleaning costs $300–$700 on average in 2026. Learn when it's actually worth it, warning signs of scams, what the EPA says, and real cost breakdowns by home size.
Whole House Generator Cost 2026: Standby vs Portable Compared
How much does a whole house generator cost in 2026? Compare standby vs portable generators, fuel types, installation requirements, sizing calculations, and ongoing maintenance costs.
Federal Tax Credits for Homeowners 2026: Complete Guide
The federal homeowner tax credits — solar, heat pumps, insulation, windows and EV chargers — have all ended. What each was worth, who can still claim one, and what's left in 2026.
AC Repair vs Replace 2026: When to Fix and When to Upgrade
Should you repair or replace your AC in 2026? Cost comparison, age guidelines, efficiency calculations, and expert tips to make the right call.
How Much Does AC Installation Cost in 2026? Complete Pricing Guide
Central AC installation costs $3,800–$7,500 in 2026. Get a breakdown by system type, SEER rating, and home size.
How to Cut Your Summer Energy Bill by $500 — 12 Proven Tips for 2026
The average US household spends $450/month on energy in summer. These 12 strategies can save you $40-60/month.
Central Air vs Window Units: Cooling Cost & Efficiency Comparison
Is central AC worth the installation cost? Compare upfront costs, monthly energy bills, efficiency, and comfort for every home size.
Attic Insulation Cost & Energy Savings: R-Value Guide (2026)
Attic insulation costs $1,500-$3,500 and can cut energy bills by 15-20%. Compare blown-in, batt, and spray foam by R-value and cost.
Electrical Panel Upgrade Cost (2026): 100 to 200 Amp Replacement Prices
Electrical panel upgrade cost in 2026 runs $1,500-$4,000 for a 100-to-200-amp replacement. See prices by amperage, labor, permits, and region.
Electrical Panel Replacement Cost by Type (2026): Federal Pacific, Zinsco & More
Electrical panel replacement cost by type in 2026 — Federal Pacific, Zinsco, fuse box, and breaker box upgrades priced out, plus amperage, labor, and permit costs.
How Much Does It Cost to Lease Solar Panels Per Month? (2026)
Solar lease monthly cost in 2026 — typical payments by system size ($50–$175/mo), how escalators raise your bill, and how leasing compares to buying month to month.
100 vs 200 Amp Electrical Panel: Cost & Which You Need (2026)
100 vs 200 amp electrical panel cost compared for 2026 — installed prices, upgrade costs, and a clear answer on which service size your home actually needs.
Breaker Box Replacement Cost (2026): Signs, Prices & Process
Breaker box replacement cost runs $1,300-$4,000 in 2026. See prices by amperage, the warning signs you need a new panel, and the step-by-step process.
Federal Pacific Panel Replacement Cost (2026): Why It's Urgent
Federal Pacific panel replacement cost is $2,000-$4,500 in 2026. Learn why FPE Stab-Lok panels are a fire hazard, how to identify one, and what to budget.
Electrical Service Upgrade Cost (2026): 200 Amp & Beyond
Electrical service upgrade cost runs $1,800-$6,000 in 2026. See prices for 200-amp and 400-amp upgrades, what the utility charges, and the full process.
Heat Pump Cost & Rebates in 2026: What You'll Pay and How Much You Can Get Back
A real-world breakdown of heat pump installation costs in 2026, why the federal 25C tax credit no longer applies, and which rebates are left to bring the price down.
Home Insulation Cost Guide 2026: Prices by Type, R-Value, and the Tax Credit
What insulation really costs in 2026 by material and area, how much R-value you need, and how to claim the federal tax credit on the work.
Energy-Efficient Windows Cost in 2026: Prices, Ratings, and the Tax Credit
What energy-efficient replacement windows cost in 2026, how to read U-factor and SHGC ratings, and how to claim the federal window tax credit.
Home Battery Storage Cost in 2026: Prices, the Expired Tax Credit, and Whether It's Worth It
What a home battery system costs in 2026, why the 30% federal tax credit no longer applies, payback realities, and how to decide if backup storage makes sense for you.
Tankless Water Heater Cost in 2026: Installation Prices, Rebates, and Payback
What a tankless water heater costs to install in 2026, gas vs. electric, the federal tax credit on heat-pump and qualifying units, and whether the switch pays off.
How to use the hvac & energy numbers on this page
Every cost figure we publish is a range, not a quote. National averages are a starting point for budgeting and for spotting a bid that's wildly out of line — they are not a substitute for getting three written estimates from licensed contractors or lenders in your own market. Labor rates, permit fees, material availability and local code requirements move these numbers more than anything else, which is why our project pages break costs down state by state instead of quoting a single national figure.
If you're early in the process, start with a calculator to get a ballpark, then read the guide that matches your situation to learn which line items are negotiable and which ones aren't. If you're already holding quotes, use the guides to check what should be included in the scope of work before you sign anything.