Blog

A quick guide to the four heating and cooling efficiency ratings — AFUE for furnaces, HSPF and COP for heat-pump heating, SEER for cooling — and how each one changes running cost.

Modern cold-climate heat pumps (ccASHPs) keep heating into sub-zero temperatures, but their efficiency (COP) falls as it gets colder. Here is what to expect and how it changes running cost.

A plain-English guide to the federal 25C tax credit and the High-Efficiency Electric Home (HEAR) and HOMES rebates in 2026, plus how state and utility programs stack on top.

Propane and heating oil are expensive per BTU, so a heat pump almost always runs cheaper. Here is the energy math and what the savings look like.

Your annual heat demand in BTU is the foundation of any heating-cost comparison. Here are three ways to estimate it — from square footage, from your gas bill, or from degree-days.

Whether a heat pump beats a gas furnace on running cost hinges on the ratio of your electricity price to your gas price and the heat pump's seasonal COP. Here is the break-even math.