How we approach our guides
How MEHVAC Journal uses sources, handles model-specific limits, and corrects mistakes.
Primary sources first
We build guidance from primary sources — standards bodies, federal programs such as ENERGY STAR, and manufacturers’ own technical material — and we link directly to each organization’s page so you can read it yourself. When a claim needs a specific document we don’t have, we say so and keep the guidance general rather than fill the gap with a guess.
Manufacturer material is labelled
A manufacturer describing its own products is an interested source. We use that material for product-family terminology and first-party figures, but we label it as manufacturer context and never present it as independent consensus or generalize a single product’s numbers to other models or brands.
Model-specific limits
Sizing, capacity, and cold-weather performance depend on your exact home and equipment. We deliberately avoid square-foot rules, universal cut-off temperatures, blanket efficiency or savings figures, and error-code tables. Those numbers belong with the manufacturer’s performance data and a qualified technician, and we point you to them instead of inventing them.
Safety boundaries
Where a guide touches operation or troubleshooting, we keep it to checks a homeowner can make without tools or opening equipment, and we mark clearly where to stop and call a professional. We don’t publish instructions for electrical, refrigerant, or other licensed work.
Dates and corrections
When a guide shows a date, it is the site’s real build date — we don’t backdate articles or claim a history the publication doesn’t have. We don’t claim outside expert review that hasn’t happened. When we find or confirm an error, we check it against the original source and update the guide. Our help and information page explains where to start in the guides and who to reach for equipment support.