Building Knowledge Blog
Coandă Effect Causes Ceiling Smudging

Coandă Effect Causes Ceiling Smudging

Posted by Bob Schneider on in Facility Operations

Recently, we received a phone call from a maintenance staff member concerned about “dirt” building up around ceiling air diffusers in the common area of his mall. This is an interesting and common problem. The solution has two parts. Part One Engineers select diffusers with initial leaving air velocity and terminal velocity in mind. Careful […]

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Aluminum vs. Copper Conductors

Aluminum vs. Copper Conductors

Posted by Hilmi Tannous on in Engineering, Fundamentals

The construction drawings are done, the specifications are complete, and bidding has commenced. A few days before bids are due, however, the contractor suggests replacing copper conductors with aluminum conductors – a suggestion that may be a value-engineering line item, or a qualification item within the bid. But what are the technical aspects of making […]

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How to Avoid Grease on Rooftops

How to Avoid Grease on Rooftops

Posted by Mike Ruff on in Engineering

Grease on a roof can put you on a slippery slope toward leaks, expensive repairs, voided warranties, unsafe work areas, fire hazards, and lawsuits. Sometimes, it causes local fire authorities to fine building owners or tenants and shut them down. Chances are you have a food court or other food type tenants. Have you seen […]

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208 or 480 Volt Service?

Posted by Joe Weagraff on in Engineering, Fundamentals

Selecting an electrical distribution voltage for a multi­-tenant commercial building is often based on prior lease agreements, previous projects, incomplete information, or intuition. Our research provides guidelines with economic justifications. Each type of service has its advantages. 208V requires less electrical equipment in the Tenant lease space and is therefore less expensive for the Tenant. […]

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208 or 480 Volt Service?

Posted by Joe Weagraff on in Tenant Coordination

Selecting an electrical distribution voltage for a multi­-tenant commercial building is often based on prior lease agreements, previous projects, incomplete information, or intuition. Our research provides guidelines with economic justifications. Each type of service has its advantages. 208V requires less electrical equipment in the Tenant lease space and is therefore less expensive for the Tenant. […]

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