Exhibit 12.2

HRPT PROPERTIES TRUST

COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED DISTRIBUTIONS

(dollars in thousands)

	Nine Months Ended September 30,					Year Ended December 31,
	2008		2007			2007 (1)			2006 (1)			2005 (1)			2004 (1)			2003 (1)
Earnings:
Income from continuing operations	$	65,149	$	73,915		$	94,320		$	221,910		$	127,213		$	138,942		$	95,210
Equity in earnings and gains (losses) on equity transactions of equity investments	—		—			—			(119,423		)	(26,115		)	(45,443		)	(23,525		)
Fixed charges before preferred distributions	134,577		126,701			171,459			165,903			143,663			118,212			101,144
Distributions from equity investments	—		—			—			5,387			22,646			24,572			27,404
Capitalized interest	—		(489		)	(489		)	(335		)	—			—			—
Adjusted Earnings	$	199,726	$	200,127		$	265,290		$	273,442		$	267,407		$	236,283		$	200,233
Fixed Charges and Preferred Distributions:
Interest expense (including amortization of debt discounts, premiums and deferred financing fees)	$	134,577	$	126,212		$	170,970		$	165,568		$	143,663		$	118,212		$	101,144
Capitalized interest	—		489			489			335			—			—			—
Preferred distributions	38,001		46,204			60,572			44,692			46,000			46,000			46,000
Combined Fixed Charges and Preferred Distributions	$	172,578	$	172,905		$	232,031		$	210,595		$	189,663		$	164,212		$	147,144
Ratio of Earnings to Combined Fixed Charges and Preferred Distributions	1.2x		1.2x			1.1x			1.3x			1.4x			1.4x			1.4x

(1)   Reclassifications have been made to the prior years’ financial statements to conform to the current year’s presentation.