Specify
Compare load assumptions, system capacity, efficiency, controls and compatibility.
Independent HVAC and home-energy guidance
Make a better call on your home’s heating, cooling and energy costs.
Estimate the job, compare systems and check contractor quotes. We show the sources, assumptions and limits behind the numbers.
Total installed costRepair or replaceLocal incentivesQuote checks
Start here
What do you need help with today?
Recommended next step
Troubleshoot safely first
Check urgent warning signs, then separate a safe homeowner check from a service call.
Start symptom checkEmergency replacementEquipmentModel, capacity, efficiency and warranty
InstallationLabor, permits, electrical and ductwork
EnergyElectricity or fuel over 5 and 10 years
OwnershipMaintenance, repairs and financing
Common starting points
What are you trying to decide?
Choose the question closest to yours. Each route ends with a practical result, not another list of links.
Why is my home uncomfortable?
Review comfort, airflow, humidity, equipment age and energy use.
Is this HVAC quote fair?
Check price, scope, warranty and financing together.
Should I repair or replace?
Compare the written repair estimate with the full replacement cost.
Which incentives still apply?
Check current state, utility and local programs.
What should I budget?
Build a broad ZIP-adjusted planning range.
Browse by system
Research the equipment and the work around it.
A system choice affects installation, electrical work, ducts, operating costs and warranty. The guides keep those pieces together.
CoolingCentral ACWhole-home cooling, ductwork and load matchingHeating & coolingMini-splitZoned heating and cooling without full ductworkHeating & coolingHeat pumpsElectric heating and cooling for the whole homeHeatingFurnacesGas, propane and electric forced-air systemsHeatingBoilersHydronic heating, radiators and replacement planningAir qualityAir purifiersFiltration, room coverage and indoor air qualityControlsSmart thermostatsControls, compatibility and energy managementHot waterWater heatersTank, tankless and heat-pump water heatingEnergySolarSystem size, production, storage and paybackHome envelopeInsulationAir sealing, envelope upgrades and comfortElectricalEV chargersPanel capacity, charging speed and installationServiceHVAC repair & maintenanceRepair decisions, tune-ups and service plans
Research & compare equipment
Room equipment and whole-home projects, clearly separated.
Compare room products with source-dated specifications. Installed systems continue into sizing, scope and contractor-quote research. CoolCompare receives no retailer commission.
▣Portable ACCompare verified room capacity, noise and power↗▤Window ACBuying guidance while verified inventory grows↗◫Mini-splitsCapacity planning plus professional installation↗◎Smart thermostatsCompatibility, controls and verified brand research↗✦Air purifiersRoom coverage, filtration and ownership factors↗❄Whole-home systemsResearch equipment, then compare installed scope↗
CoolCompare Project Planner
Turn your home into a quote-ready brief.
Organize your home facts and project needs. Choose an equipment path for a broad budget screen, then carry the brief into written quote, energy and ownership comparisons.
A better comparison model
Price is only one line in the proposal.
A low equipment price can hide incomplete electrical work, undersized duct changes, short labor warranties or expensive financing.
Scope
Normalize labor, permits, electrical, ductwork, disposal and commissioning.
Own
Model energy, maintenance, financing and likely repairs over 5 and 10 years.
Select
Compare eligible local contractors on price, scope, credentials and warranty when matching coverage is available.
NEW · HOME SECURITY
Open the home security desk →Compare the real cost behind the alarm-system offer.
Audit ADT, SimpliSafe, Ring and five more providers across equipment, monitoring, financing, renewal and cancellation terms.
NEW · ELECTRICITY INTELLIGENCE
Run my ZIP →Connect your ZIP, bill, EV, solar, battery and HVAC.
Use source-dated EIA benchmarks, then replace the assumptions with your own consumption and project economics.
New from the research desk
View all guides →Fresh guides for smarter home decisions.
Electricity intelligence
EIA’s October Electricity Outlook: What a Hot Summer and Higher Wholesale Prices Mean for a Home Bill
U.S. electricity use rose 4% in the third quarter as residential use rose 6%, while EIA forecasts 2026 wholesale prices 11% above 2025. Neither number is your tariff—use them to test, not replace, your own bill evidence.
4 min read · Reviewed 9 October 2026
Home energy
Natural Gas Storage Before Winter 2026–27: What the October Forecast Means for Your Bill
EIA now forecasts 3,850 Bcf in storage at the end of October—2% above the five-year average, but lower than its September forecast. Use that national supply context without mistaking it for your utility rate or winter bill.
5 min read · Reviewed 8 October 2026
Home energy
Winter Heating Costs 2026–27: What EIA’s Forecast Means for Your Home
EIA expects average winter spending to rise for electric- and heating-oil homes and fall for many natural-gas and propane homes. Translate the national forecast into a household plan using your fuel, region, weather sensitivity and actual bills.
6 min read · Reviewed 7 October 2026
HVAC & cooling
Cold-Climate Heat Pump Planning: Capacity, Backup Heat and Winter Cost
Use the home load, exact low-temperature model data, backup-heat controls and the household tariff—not a seasonal label or national forecast alone—to compare a cold-climate heat-pump proposal.
5 min read · Reviewed 6 October 2026
HVAC & cooling
HVAC Permits, Inspections and Commissioning Guide
Verify the authority, assign permit and correction responsibility, distinguish inspection from commissioning, and collect the records that close an HVAC installation.
4 min read · Reviewed 4 October 2026NEW · COOLCOMPARE WATCH
Open the video library →Visual explainers for the decisions behind the equipment.
Watch official videos without loading a third-party player until you choose to press play.
Independent research desk
Shortlist the system. Then check the brand.
Use decision guides to narrow the project route, then research exact equipment families before comparing contractor proposals.
01Heat pump vs. furnaceCompare fuel, climate performance, cooling, electrical scope and 10-year ownership before replacing a heating system.↗02Central AC vs. heat pumpBoth can cool through ducts; the key difference is whether the outdoor system also supplies heat.↗03Mini-split vs. central ACCompare zoning, ducts, indoor-unit placement, electrical work and whole-home distribution.↗04Boiler vs. furnaceHydronic and forced-air heat differ in distribution, response, cooling integration and replacement scope.↗05Tank vs. tankless water heaterCompare peak hot-water demand, fuel and venting, installation changes, maintenance and delivered capacity.↗06Heat-pump vs. gas water heaterCompare room conditions, electrical and venting work, recovery, operating cost and installation constraints.↗
CarrierCentral AC · Heat pumpsTraneCentral AC · Heat pumpsLennoxCentral AC · Heat pumpsRheemCentral AC · Heat pumpsDaikinMini-split · Heat pumpsMitsubishi ElectricMini-split · Heat pumpsBoschHeat pumps · BoilersA. O. SmithWater heatersecobeeSmart thermostatsEnphaseSolarTesla EnergySolar · EV chargersChargePointEV chargers
Brand inclusion is informational—not a ranking or endorsement. Compare model numbers, matched components, installer qualifications and written warranty terms.
Local contractor marketplace
Prepare comparable proposals.
Availability depends on trade and ZIP coverage. Check coverage first; if eligible providers are available, a structured project brief can help compare equipment, scope and financing. If coverage is limited, take the same checklist to contractors you contact yourself.
Check local proposal coverage →