UPDATE 1-Comfort Systems Q3 profit beats estimates

* Q3 EPS $0.25 vs est $0.23

* Q3 rev falls 16 pct

* To continue to invest in new and existing ops

Nov 3 (Reuters) - Comfort Systems USA Inc (FIX.N), a provider of heating, ventilation and air conditioning services, posted a better-than-expected quarterly profit, helped by bookings in smaller projects and service work.

For the third quarter, the company reported net income of $9.5 million, or 25 cents a share, compared with $13.8 million, or 34 cents a share, a year ago.

Revenue fell 16 percent to $291.6 million.

Analysts on average expected the company to earn 23 cents a share, before special items, on revenue of $292.8 million, according to Thomson Reuters I/B/E/S.

"We will continue to invest in new and existing operations and we believe that over the coming months we can add new businesses in attractive geographies," Chief Executive Bill Murdy said.

Shares of the Houston-based company closed at $11.08 Tuesday on the New York Stock Exchange. (Reporting by Fareha Khan in Bangalore; Editing by Unnikrishnan Nair)