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Dennis Allen
Dennis Allen is the COO and Director of HVAC at Harold Brothers Mechanical. With over 20 years in the trade, he leads the HVAC division and mentors the next generation of technicians. A board member for the Massachusetts Pipefitters and Refrigeration Board, Dennis is passionate about education, field excellence, and emerging technologies like VRF systems.
How HVAC Upgrades Cut Energy Costs for New England Businesses
How HVAC Upgrades Cut Energy Costs for New England Businesses
August 27th, 2025|3 min read
Constant Air Volume vs. VAV HVAC: Which System Is Best for You?
Constant Air Volume vs. VAV HVAC: Which System Is Best for You?
June 30th, 2025|4 min read
Annual HVAC Operating Costs for New England Commercial Buildings
Annual HVAC Operating Costs for New England Commercial Buildings
May 12th, 2025|4 min read
Is Turning Off Your Commercial HVAC a Costly Mistake or a Smart Move?
Is Turning Off Your Commercial HVAC a Costly Mistake or a Smart Move?
April 9th, 2025|4 min read
How Much Does a Building Management System Cost and Why It’s Worth It
How Much Does a Building Management System Cost and Why It’s Worth It
April 2nd, 2025|4 min read
5 Reasons Why a Commercial Building Needs an HVAC Rooftop Unit
5 Reasons Why a Commercial Building Needs an HVAC Rooftop Unit
March 12th, 2025|3 min read
The Cost of HVAC Replacement in Massachusetts
The Cost of HVAC Replacement in Massachusetts
February 25th, 2025|4 min read
Common Commercial HVAC Problems That Preventative Maintenance Prevents
Common Commercial HVAC Problems That Preventative Maintenance Prevents
February 11th, 2025|4 min read
Massachusetts Businesses Are Paying Too Much to Cool Their IT Rooms
Massachusetts Businesses Are Paying Too Much to Cool Their IT Rooms
February 3rd, 2025|4 min read
What is the Cost of Commercial HVAC Maintenance in Massachusetts?
What is the Cost of Commercial HVAC Maintenance in Massachusetts?
January 13th, 2025|4 min read