Douglas Spratt & Associates Ltd. (DSA) is a boutique consulting firm serving BC and Western Canada. Based on over 30 years of consulting experience of its principal, DSA offers a unique blend of business and engineering services to the building industry. For the existing building market, DSA offers evaluation and design services relating to mechanical systems such as heating, ventilating and air conditioning (HVAC), plumbing and fire protection. This includes feasibility studies, ventilation improvements for indoor air quality, condition and life cycle assessments, code upgrades, and due diligence reviews. For new building construction, DSA provides design and value engineering service reviews. The company's staff have experience in a broad range of mechanical systems and buildings.