Download PDF


Keystone Mechanical Group Inc. has recently celebrated its 15th year in business and the company's founder and CEO, Domenic D'Agostino, is a well-respected entrepreneur with over 20 years’ experience in the HVAC industry. Recently, Mr. D'Agostino has partnered with Nando Giammaria, also a very well respected entrepreneur in the industry, who brings over 30 years’ experience in the HVAC field himself.

Domenic D'Agostino’s Keystone Mechanical Group Inc. prides itself in providing exceptional residential, commercial and industrial HVAC services, including emergency response service, fireplace inserts, gas fireplaces, electric fireplaces and preventative maintenance. In his quest to meet his customer's needs, Mr. D'Agostino paired Keystone with Crystal Fireplaces Inc. during the summer of 2010. Expanding the company allowed Keystone to also offer its customers the sales and installation of contemporary and traditional fireplaces and mantels.

Keystone Mechanical Group Inc.

30 Apex Road

Toronto, ON M6A 2V2

Phone: (416) 782-3500