Using This Site

Information, not advice

Pages on this site explain how quotes, sizing, ratings, rules and programs work, using the primary sources each page links. They are general information, not engineering, legal, tax or financial advice for your situation. Nobody at The Second Bid has seen your home, your equipment or your paperwork.

Your local building department and the code it enforces decide what a job needs, including permits and inspections. A licensed HVAC contractor decides how the work is done. For tax questions, the IRS and a tax professional decide what you can claim.

Safety matters most. Work on refrigerant, gas lines, burners, electrical panels and capacitors belongs to a licensed technician. When a fault is beyond a filter or thermostat, the next step is a technician, not a tool. For a sounding carbon monoxide alarm, leaving the house comes first; the carbon monoxide page has the steps.

Rules change

Tax credits, rebate programs, efficiency minimums and refrigerant rules changed several times between 2023 and 2026, and some are still under petition or in court. Figures carry a date, such as "as of October 2026", and the how pages are checked page explains how sources are chosen and dated. Before you act on a credit, rebate or deadline, confirm it on the agency's own page.

Outside links

Pages link to government agencies, standards bodies and equipment makers so you can read the source. Those sites are run by others, and their content can change after a page here was checked. A few pages link to businesses run by the same team as this site; those links are labelled and listed on who runs this site.

Liability

The information is provided as is, without any promise that it is complete, current or suited to your home. The Second Bid isn't responsible for decisions made, work done or money spent based on it. Use it to prepare better questions, then rely on your local code officials and a licensed contractor for the answers that apply to you.