Independent research for the working parts of your house
Choose the right system for your house.
The Home Engine helps you compare the equipment that heats, cools, and supplies power and water to your home — before a contractor narrows the choice for you.
Every important number traced to a source. No manufacturer placements. No contractor commission.
Where are you in the decision?
Start with what's true today. We'll ask only for the details that matter next.
I know what I need
Take me to buying guides, product comparisons, specifications, and owner reports.
Browse by system →I have a contractor quote
Check the equipment match, sizing assumptions, price, and incentive claims before I sign.
Check my quote →Looking for 2026 incentives or equipment that fits your climate?
The people who sell you the system shouldn't be the ones choosing it.
Most contractors install a short list of brands. That can make for a good installation, but it doesn't make for a complete comparison. We research the equipment independently, show where every material number came from, and separate the manufacturer's claims from what owners and technicians report later.
Specifications, sourced
Efficiency, capacity, operating limits, warranty, and price — linked to the original record.
Trade-offs, stated plainly
We tell you what the better feature costs, and when the expensive option is the wrong one.
Real-world reports, kept separate
Owner experience and trade opinion never masquerade as laboratory data.
Research by system
Start with what you're replacing. Each guide explains the decision; each product page shows the evidence.
Heating & cooling
Equipment for keeping the house comfortable — and the trade-offs among ducts, fuel, efficiency, and cold-weather performance.
Water
The equipment that heats household water or brings it in from a private well.
Home energy
Equipment that makes, stores, and shifts electricity at home.
What a The Home Engine answer looks like
A heat pump can look excellent on paper and still be wrong for your house.
The useful questions aren't only its headline efficiency. How much heat does it still produce at your winter design temperature? Does the listed outdoor unit actually match the indoor equipment? Can a qualified local company service it? We put those answers together, show the sources, and tell you where the evidence is thin.
Our take
Strong fit for a cold-climate house that already has usable ducts
- Keeps 100% of its rated heating capacity at 5°F — most heat pumps quietly lose about a third of theirs exactly when you need it most
- Priced at the top of the range among heat pumps with a sourced installed cost: $12,900–$18,100
- You're locked into Carrier's dealer network for service once it's installed
Both federal residential energy tax credits (25C and 25D) expired 31 December 2025. Published advice that still assumes a 30% credit is out of date — for a solar array that's roughly a 43% jump in what you actually pay.
What owners actually report. The research people currently do across Reddit, YouTube, Amazon and trade forums over several evenings — spec sheets checked against reality, trade opinion kept separate from marketing, and what actually fixed it — collected and linked back to the original.
Buying guides
Written to be worth reading twice. Specific, opinionated, and willing to say when the expensive option is the wrong one.
Start here · 11 min read
How to choose a heat pump
Sizing beats efficiency, capacity at 5°F beats HSPF2, and the contractor matters more than the brand. A practical order of operations.
Read the guide →Cold-climate heat pumps: what actually matters
'Works down to -13°F' and 'still produces useful heat at -13°F' are different claims. Here is how to tell which one you are being sold.
How to choose a central air conditioner
The number that ends most AC regret isn't on the SEER2 sticker — it's the tonnage. Here's what actually separates a good install from a clammy one.
Furnaces: staging is the specification that matters, not AFUE
Two furnaces can both be rated 96% AFUE and behave completely differently in your house. What actually separates them is whether they can throttle down to match a mild day, or only run flat-out until the thermostat is satisfied.
Why trust any of this
Because you can check it. Every number on this site is stored with the document it came from, the date it was read, and a confidence score. Where two sources disagree, we record the disagreement and show which one we published. Where the disagreement is large, we withhold the product rather than guess — 4 products are currently withheld for exactly that reason.
We rank sources by authority, not by convenience. A certification body outranks a manufacturer's marketing sheet, which outranks a review site. When a higher-authority source becomes available, it automatically replaces what we had.
Read the full methodology → · See every source we use · About The Home Engine
Start with the system you need to get right.
Answer a few questions about your house and we'll rank the equipment that actually fits it — with the trade-offs stated plainly, not sold to you.