HVAC & Utilities
Cost Calculators

A complete HVAC system (furnace + central AC) typically costs $7,000–$15,000 installed for a standard home. Central AC alone runs $4,000–$8,000, and a furnace replacement is $2,500–$6,000. Costs vary by system size (tonnage), efficiency rating (SEER/AFUE), brand, and regional labor rates. Use our HVAC Installation Cost Calculator for a home-size specific estimate.

The federal minimum is SEER 14–15 depending on your region. SEER 16–18 is the sweet spot for most homeowners — meaningfully more efficient than minimum without the premium price of SEER 20+. If you run AC heavily (Southern states), going to SEER 18–20 often pays back in 5–8 years through lower utility bills. SEER 16+ units also qualify for the 30% federal tax credit.

Tank water heaters last 8–12 years; tankless units last 20+ years. Signs it's time to replace: age over 10 years, visible rust or corrosion, frequent repairs costing more than 50% of a new unit, inconsistent hot water, or a significant jump in energy bills. Replacing proactively gives you time to compare options and avoid paying emergency plumber rates.

Central air is better for whole-home cooling in homes with existing ductwork — lower cost per room and consistent comfort throughout. Mini splits are better for homes without ducts, room additions, garages, or zone-specific control. A single-zone mini split costs $3,000–$5,000 installed; a multi-zone system with 4 zones runs $8,000–$15,000.

The U.S. Department of Energy recommends R-38 to R-60 for attics in most climate zones. Most homes need 10–16 inches of blown-in fiberglass or cellulose to hit R-38. If your attic has less than 4 inches, adding more is one of the highest-ROI home improvements available — typical payback is 3–5 years. Attic insulation also qualifies for a 30% federal tax credit up to $1,200.

Yes, in most cases. Heat pump water heaters use 2–3x less electricity than standard electric tanks. They cost $1,200–$2,000 installed vs. $600–$1,200 for a standard electric unit, but the $300 federal tax credit and lower operating costs typically produce a 4–7 year payback — then you're saving $200–$400 per year for the life of the unit. Best suited for conditioned spaces with at least 700 cubic feet of air volume.

Yes. The Inflation Reduction Act provides a 30% federal tax credit (up to $600 per item) for qualifying HVAC equipment — central AC (SEER2 ≥ 16), gas furnaces (AFUE ≥ 97%), and air-source heat pumps meeting efficiency thresholds. Heat pump water heaters qualify for up to $2,000. Insulation upgrades qualify for up to $1,200. Credits reset annually — file IRS Form 5695 with your return.

Duct sealing (mastic or aeroseal) costs $300–$1,000 and fixes leaky joints without replacing ducts — best when ducts are structurally sound but leaking. Full duct replacement costs $3,000–$10,000+ and is needed when ducts are crushed, poorly designed, deteriorating, or asbestos-wrapped. Have an HVAC tech inspect and pressure-test your ducts before recommending replacement — sealing often solves 80% of efficiency losses at a fraction of the cost.

HVAC systems should be serviced twice a year — once in spring before cooling season and once in fall before heating season. Annual tune-ups cost $80–$150 per visit and prevent costly emergency breakdowns. Change your air filter every 1–3 months (more often with pets). Regular maintenance extends equipment life by 3–5 years and typically maintains manufacturer warranty coverage.

A straight equipment replacement (same system type, existing ductwork in good condition) takes 4–8 hours for a standard home. A full system installation with new ductwork takes 1–3 days. Mini split installations without ductwork typically take 4–6 hours per zone. Emergency replacements can sometimes be done same-day or next-day in summer, though you may pay a premium for priority service.