Editorial policy and how we source prices

Our rules for what goes on this site:

• No invented numbers. A price, lifespan or percentage appears only with a named source you can open. Where we could not source a figure, we explain what drives the cost instead of guessing.
• No fake reviews or ratings. We do not publish star ratings, testimonials or rankings of contractors or brands.
• Safety over convenience. Gas, electrical and refrigerant work is for licensed professionals. Our do-it-yourself checks stop at filters, breakers, thermostats, vents and drains.
• Clear about money. Every page says that we are paid when you contact a contractor through us.
• Corrections. If you find an error, write to us and we will fix it and note the change.

Guides are general information. They cannot replace a technician looking at your equipment.