About this calculator

This is a free reference tool that answers one question with real physics: what would a new air conditioner, heat pump, or furnace actually save on your energy bills? It computes the answer from the typical-year weather at the station nearest your house, the system you have today, and your own utility prices — not from national averages or marketing math.

It is deliberately not a sales tool. There is no lead form, nothing to buy, and no "get quotes" funnel. When the honest answer is that an upgrade won't pay for itself — which is common, especially where fuel is cheap — the calculator says exactly that. The methodology page documents every source and constant.

Why another calculator

Because the ones that exist answer a narrower question than they appear to. The common SEER savings calculator multiplies your nameplate tonnage by a fixed count of cooling hours for your city and divides by the old and new SEER, with the old unit priced as if it were new. There is no house in that formula, no age, and nothing you can change. This one runs hourly weather at your zip through a model of your house, ages the existing unit, lets you set the thermostat, the seal level, and the number of people, and shows every constant it used. The thermostat alone is the biggest lever you control: the same Florida house at 72 °F runs a cooling bill nearly half again what it runs at 77 °F, and no fixed-hours formula can see that. The methodology page explains exactly where the differences come from.

Who builds it

The calculator is built and maintained by the team at Liberty Air and Electric, a licensed HVAC and electrical contractor in Florida. We built the savings engine for our own customers and decided the national version should exist as a public reference — the kind of tool we wished existed when homeowners asked us "is the high-efficiency unit worth it?" We are not affiliated with any equipment manufacturer or utility, and this site doesn't sell or refer anything.

Using it elsewhere

Contractors, utilities, and writers are welcome to link the calculator or reference its output with attribution. An embeddable version is planned; if you want it sooner, the footer of every page says who to find.

The fine print

All output is an estimate for planning, not a quote or a guarantee of savings. Estimates depend on typical-year weather and the inputs you provide; your home, installation quality, and actual weather will differ. Nothing here is professional advice about your specific installation — get a load calculation and a real quote before buying anything.