We’re comparing three of the top brands in the market: Lennox vs. Trane vs. Carrier and breakdown which brand makes the best system and what differentiates them from the rest.

The biggest stories of the day delivered to your inbox.

Executive Editor David Carnoy has been a leading member of CNET's Reviews team since 2000. He covers the gamut of gadgets and is a notable reviewer of mobile accessories and portable audio ...

The Price to Earnings (P/E) ratio, a key valuation measure, is calculated by dividing the stock's most recent closing price by the sum of the diluted earnings per share from continuing operations ...