Refrigerant Monitoring Code Requirements
ASHRAE 15 requires the monitoring of refrigerant leaks under certain conditions within a mechanical room, but what about an occupied space where refrigerant is circulated through VRF/VRV (Variable Refrigerant Flow) Indoor Fan Coils? When is a...
DOAS - Energy Recovery
When is an Energy Recovery system required according to ASHRAE 90.1 (2013)?
ASHRAE 90.1 2013
(Energy Standards for Buildings, Except Low Rise Residential Buildings)
When using a VRF Dedicated Outside Air System (DOAS) to bring in ventilation air to...
VRF Heat Pump or Heat Recovery (How to choose between a VRF Heat Pump or Heat Recovery System) or Packaged DX
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Manufactures VRF Piping Layout Drawings
The VRF Piping Layout is highly engineered by the VRF manufactures software to design the pipe sizes to meet the capacities and conditions required, including ASHRAE 15. The pipe sizes are affected by capacity, pipe lengths and...
Tenant Submetering
How do you bill tenants for their share of the use of a piece of air conditioning equipment that is shared amongst more than one tenant in your building? If you have a VRF Air Conditioning system, where...
ZoomLock Value Calculator Review
The ZoomLock Value Calculator provides a quick way to analyze the cost difference between doing a project with brazed joints versus the ZoomLock press-fit connection method. In this article we will do a ZoomLock Value Calculator...
Daikin now has available a Dual Fuel, 3-phase variable refrigerant flow system. Daikin made it adaptable to the North American market with its ability to integrate with the ubiquitous gas furnace. For heating Daikin gives you the...
VRF System Control Wiring
This VRF System control wiring is for a VRF VRV Heat Recovery System with single port branch selector boxes. The control wiring is very simple, it’s basically two 18 gauge wires that go from the thermostat...
What is VRF
VRV Variable Refrigerant Volume systems were invented in Japan in 1982 by Daikin and brought to the United States in 2004. These systems are used worldwide. Daikin VRV (Variable Refrigerant Volume) is their trademarked name, that’s why...
How Much does a VRF System Cost per Ton ($/Ton) or per Square Foot ($/Ft2)? How many Ft2/Ton should you figure? How much does the Electrical Cost per Indoor Unit ($/IDU)? Track all of these and MORE with the...
