2.	REVENUES

Adoption of New Revenue Standard

We adopted the New Revenue Standard on January 1, 2018 using the modified retrospective approach. The New Revenue Standard did not have an impact on the amount or timing of our revenue recognition; however, certain payments to customers were reclassified from expenses to a reduction from revenues, resulting in an immaterial impact to the individual financial statement line items of our condensed consolidated unaudited statements of income. Results for reporting periods beginning on and after January 1, 2018 are presented under the New Revenue Standard, while prior period results have not been adjusted and continue to be reported under the accounting standards in effect for those periods.

Revenue Recognition

Revenue primarily consists of sales of air conditioning, heating and refrigeration equipment and related parts and supplies. We generate our revenue primarily from the sale of finished products to customers; therefore, the significant majority of our contracts are short-term in nature and have only a single performance obligation to deliver products; therefore, we satisfy our performance obligation under such contracts when we transfer control of the product to the customer. Some contracts contain a combination of product sales and services, the latter of which is distinct and accounted for as a separate performance obligation. We satisfy our performance obligations for services when we render the services within the agreed-upon service period. Total service revenue is not material and accounted for less than 1% of our consolidated revenues for both the quarter and nine months ended September 30, 2018.

Revenue is recognized when control transfers to our customers when picked up or via shipment of products or delivery of services. We measure revenue as the amount of consideration we expect to be entitled to receive in exchange for those goods or services, net of any variable considerations (e.g., rights to return product, sales incentives, others) and any taxes collected from customers and subsequently remitted to governmental authorities. Revenue for shipping and handling charges is recognized when products are delivered to the customer.

Product Returns

We estimate product returns based on historical experience and record them on a gross basis. Substantially all customer returns relate to products that are returned under manufacturers’ warranty obligations. Accrued sales returns of $14,702 at September 30, 2018 were included in accrued expenses and other current liabilities in our condensed consolidated unaudited balance sheet.

Sales Incentives

We estimate sales incentives expected to be paid over the term of the program based on the most likely amounts. Sales incentives are accounted for as a reduction in the transaction price and are generally paid on an annual basis.

Disaggregation of Revenues

The following table presents our revenues disaggregated by primary geographical regions and major product lines within our single reporting segment:


	Quarter Ended September 30,						Nine Months Ended September 30,
	2018			2017(1)			2018			2017(1)
Primary Geographical Regions:
United States	$	1,176,087		$	1,114,162		$	3,233,731		$	3,064,181
Canada		87,251			76,408			218,730			199,788
Mexico		32,669			39,021			102,866			113,641

	$	1,296,007		$	1,229,591		$	3,555,327		$	3,377,610

Major Product Lines:
HVAC equipment		68	%		68	%		68	%		67	%
Other HVAC products		28	%		27	%		28	%		28	%
Commercial refrigeration products		4	%		5	%		4	%		5	%

		100	%		100	%		100	%		100	%

(1)	As noted above, prior period amounts have not been adjusted under the modified retrospective method and remain as originally reported for such periods.

Practical Expedients

We generally expense sales commissions when incurred because the amortization period is one year or less. These costs are recorded within selling, general and administrative expenses. We do not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less.