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VRF Variable Refrigerant Flow

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...
VRF Piping Connection Methods Zoomlock LokRing Refnet

VRF Piping Connections

VRF Piping Connections There are several methods for joining refrigerant piping to VRF System components and fittings. The following mechanical VRF Piping connections can save labor but will cost extra in material. ZoomLock™ by Parker This is a mechanical joint that can...
VRF Heat Recovery - Single Port Branch Selector Box

VRF Heat Recovery System

VRF Heat Recovery System Using a VRF Heat Recovery system allows you to provide simultaneous cooling and heating. This means that one zone can be in cooling mode while another is in heating. This is not possible with a VRF...
VRF Manufacture Comparison, Daikin, Mitsubishi, LG, Toshiba, Carrier, Trane, Fujitsu, Panasonic, Hitachi

VRF Manufacture Comparison

VRF Manufacture Comparison With so many VRF manufactures to compare, it’s hard to decipher all the variations between systems. Below you'll find a comparison of VRF manufactures such as, Daikin, Mitsubishi, LG, Carrier, Toshiba (Carrier), Fujitsu, Panasonic, Hitachi (York) and...
VRF Cost per Ton and cost per ft2

VRF Cost per Ton

VRF Cost per Ton or Cost per Ft2 to Install? How do you determine the cost per ton or cost per square foot for the installation of a VRF system? What factors play a role in the VRF cost per ton...
VRF Piping Hangers and Expansion Loops When hanging or fastening VRF copper refrigerant piping that involves long runs, then some form of considerations needs to be made for expansion due to temperature differences. If no allowances are made for expansion in...
VRF Installation Cost Budgeting

Estimate VRF Projects

How to Estimate VRF Projects HVAC Estimating is the foundation upon which all construction company profits are built. If you don’t get the estimates correct, your company won’t be in business very long. If you don’t understand your cost and...
doas energy recovery

DOAS Energy Recovery

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 Ventilation

VRF Ventilation

VRF Ventilation The building requirement for ventilation air and the methods of delivering this air vary by geographic location. We’ll discuss several methods commonly found in various region of the United States. Indoor air quality (IAQ) is important for occupant...
What is VRF Air Conditioning

What is VRF

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...
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