HVAC Contracting

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NIST’s study, entitled “Limited options for low-global warming potential [GWP] refrigerants,” focused on residential and small-commercial single-package and split air conditioning systems, but the authors said their conclusions also generally apply to room air conditioning units and other refrigeration and heat-pump systems currently using common, ozone-depleting refrigerants such as R-410A or R-22, which are still used in some developing countries today. “The takeaway is there is no perfect, easy replacement for current refrigerants,” NIST chemical engineer Mark McLinden said.

Bob and Tim have arrived at a customer’s house that uses fuel oil for heat. This is a “no heat” call — the customer called first thing this morning and said that the oil furnace was not coming on, and the house was cold. When they arrived, they talked to the customer, and the customer said that he had made several tries to get the furnace to operate but with no luck.

As old induction units inevitably decline in efficiency, facility owners and managers are faced with critical decisions: upgrade to more modern induction units or embark on extensive, costly renovation projects to overhaul entire HVAC systems.

It’s the middle of summer and your customer, who can’t provide you with any helpful information about the history of this situation since they just recently purchased the business, is complaining that the temperature inside their small convenience store won’t get comfortable whenever the outdoor temperature gets over 90°F.

Proper indoor air quality and adequate humidity levels are imperative to safe and efficient data center operations. Humidification in data centers is required to prevent electrostatic discharge, which can damage servers and network products, and offers the benefit of high capacity, low cost evaporative cooling.