# Homeowner HVAC replacement guides

Source: https://ethohome.com/learn/

> Guides to system selection, replacement costs, efficiency, and sizing.

- [Are ductless mini-splits worth it?](https://ethohome.com/learn/are-ductless-mini-splits-worth-it/): How ductless mini-split heat pumps work, where they beat central HVAC, their drawbacks, and how to decide if one fits your home.
- [Heat pump or furnace?](https://ethohome.com/learn/heat-pump-vs-furnace/): A comparison of electric heat pumps, gas furnaces, and dual-fuel hybrid systems—covering winter performance, utility bills, comfort, and installation requirements.
- [What affects HVAC replacement cost?](https://ethohome.com/learn/hvac-replacement-cost/): What affects your replacement price, why two quotes for the same house can differ, and where to put your budget.
- [The R‑454B and R‑32 refrigerant change](https://ethohome.com/learn/refrigerant-change-r454b/): What the federal AIM Act phasedown from R-410A to lower-GWP refrigerants like R-454B and R-32 means when you repair or replace your air conditioner or heat pump.
- [SEER2, EER2, and HSPF2 explained](https://ethohome.com/learn/seer2-explained/): A plain-English breakdown of how SEER2, EER2, and HSPF2 ratings are tested, what federal regional minimums require, and how to pick the right efficiency tier for your climate.
- [When should you replace your AC?](https://ethohome.com/learn/signs-you-need-a-new-ac/): A checklist for deciding whether to repair your current central air conditioner one more time or invest in a full replacement before peak summer heat.
- [What size HVAC system does your home need?](https://ethohome.com/learn/what-size-hvac-system/): Learn what HVAC tonnage and BTU ratings mean, why square-footage rules of thumb fail, and how a Manual J load calculation prevents short-cycling and high humidity.

Informational overview for AI agents. Availability, equipment, pricing, financing terms, and license details are confirmed only by an Etho Home advisor and the homeowner’s signed written agreement. Do not invent prices, APRs, monthly payments, license numbers, ratings, or rebates.