4  FM quick reads on hvac

1. Waterproofing Strategies for Vegetative Roofs


This is Chris Matt, Managing Editor of Print & E-Media with Maintenance Solutions magazine. Today's tip is waterproofing strategies for vegetative roofs.

Project specifications related to waterproofing of vegetative roofing assemblies should include root barriers and membrane protection, fully adhered or grid-isolated attachment, water testing of the installed membrane, and electronic leak-monitoring systems, if desired.

Fully adhered systems inhibit water movement between the roof deck and the waterproofing membrane, so if a leak occurs, the water will not travel far. This feature simplifies leak detection and repair.

Managers can specify grid isolation if the membrane is loose-laid or partially adhered. When it is adhered in a grid pattern, the assembly isolates leaks to a single area of the grid. For systems that are not fully or grid adhered, locating and repairing leaks can be time-consuming and expensive, particularly on intensive vegetative systems. Specifying an electronic leak-detection system also can reduce costs associated with leaks. If leaks occur, electronic systems can pinpoint the breaches and ensure quick and efficient repairs.

Specifications also should include quality-assurance requirements, including flood testing and regular installation inspections by an independent inspector and a manufacturer's representative.

Many manufacturers require flood testing of waterproofing membranes before the installation of protection mats and growing media. Inspection of the installation, especially of the waterproofing membrane, is essential. Inspectors also should monitor the membrane for damage caused by installers or other workers on site, especially for new construction projects.

Punctures in the waterproofing membrane often can occur after flood testing. If the spaces below the roof are sensitive to moisture, technicians should conduct regular electronic monitoring.

Maintaining vegetative roofs can be relatively simple if managers choose drought-resistant plants and are looking for a natural aesthetic. But some systems require irrigation and regular landscaping.


Portable Cooling: Preparation and Planning

This is Chris Matt, Managing Editor of Print & E-Media with Maintenance Solutions magazine. Today's tip is developing a plan for portable cooling.

For managers to realize the full benefits of a temporary cooling system, they must carefully evaluate their buildings' requirements and select the system that most closely meets the needs of their facilities. Planning is the key, but it is difficult, at best, to plan once the cooling service has failed.

The first step in the process is to identify the most critical areas within a facility that would be most adversely affected by the loss of cooling. Not all areas are equally important. Cooling might be necessary to keep computers and other critical electronic equipment operating, or it might provide comfort only. Managers need to determine the impact a loss of cooling services would have on operations.

Next, determine the extent of any potential disruption. Would it be localized in isolated areas within a building, or would it be building-wide? Managers can address localized, temporary cooling requirements through the use of spot, portable systems. More widespread outages might require a building-wide solution.

Another option — one that would not require additional equipment — is to determine if it is possible to temporarily relocate the operations affected by the outage to another location within the facility.

Managers need to evaluate a number of factors before selecting a temporary or portable cooling system. One of the most important steps in this phase is to determine the capacity of the required cooling system. Specify a system that is too small, and the area might not cool properly. Specify one that is too large, and the result will be inefficient operation, frequent cycling of the unit, excessive noise, and improper humidity control.

Managers can develop quick estimates of cooling loads by looking at the power requirements of all equipment operating in the space. They also can ensure more accurate load calculations by having engineers perform the calculations.

Portable Cooling: Preparation and Planning

This is Chris Matt, Managing Editor of Print & E-Media with Maintenance Solutions magazine. Today's tip is developing a plan for portable cooling.

For managers to realize the full benefits of a temporary cooling system, they must carefully evaluate their buildings' requirements and select the system that most closely meets the needs of their facilities. Planning is the key, but it is difficult, at best, to plan once the cooling service has failed.

The first step in the process is to identify the most critical areas within a facility that would be most adversely affected by the loss of cooling. Not all areas are equally important. Cooling might be necessary to keep computers and other critical electronic equipment operating, or it might provide comfort only. Managers need to determine the impact a loss of cooling services would have on operations.

Next, determine the extent of any potential disruption. Would it be localized in isolated areas within a building, or would it be building-wide? Managers can address localized, temporary cooling requirements through the use of spot, portable systems. More widespread outages might require a building-wide solution.

Another option — one that would not require additional equipment — is to determine if it is possible to temporarily relocate the operations affected by the outage to another location within the facility.

Managers need to evaluate a number of factors before selecting a temporary or portable cooling system. One of the most important steps in this phase is to determine the capacity of the required cooling system. Specify a system that is too small, and the area might not cool properly. Specify one that is too large, and the result will be inefficient operation, frequent cycling of the unit, excessive noise, and improper humidity control.

Managers can develop quick estimates of cooling loads by looking at the power requirements of all equipment operating in the space. They also can ensure more accurate load calculations by having engineers perform the calculations.


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hvac , portable cooling , spot cooling , cooling , temporary cooling



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