LATEST ARTICLES

VRF Central Controller

VRF System Controller

Find comparison on VRF System Central Controllers for all major manufactures. Daikin, Carrier, Toshiba, Panasonic, Mitsubishi, Trane, York, LG, Fujitsu, Lennox, The following...
Engineering Videovideo

Engineering Videos

How to Calculate Cooling Coil Heat Transfer https://youtu.be/0G0RkWHY1Jg How to Calculate COP & KW per Ton
VRF Project Cost Tracking

VRF Project Cost Tracker

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...
ZoomLock Fitting Cost Analysis

ZoomLock Cost Analysis

ZoomLock Cost Analysis Determining if there is value in using a press-fit joint such as ZoomLock™ requires that you look at several factors that impact cost and quality. We covered...
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,...
VRF Case Studies

VRF Case Studies USA

VRF Case Studies USA The following links are for VRF case studies USA from various VRF manufactures. Also see the following for links to VRF Project Videos or VRF Case...
VRF Project Videos

VRF Project Videos – USA

VRF Project Videos Below are links to VRF project videos based on building type and VRF system description. Clink on the building name to watch a video about the project. We...
VRF for Residential Homes and Commercial Buildings

VRF Heat Recovery vs VRF Heat Pumps for Homes and Commercial Properties

Should you install a VRF Heat Recovery or VRF Heat Pump system for a Residential home or commercial property? We will discuss three options...
coronavirus and the heating season

Is Your Heater making you Sick

Is your building too dry inside, thereby providing life sustaining low humidity levels for the Coronavirus or other viruses to live? Researchers at Yale identify...
Nitrogen Purge ACR Tubing Recovered

Why Purge ACR Piping with Nitrogen when Brazing

Why its important to purge ACR piping in a VRF system
VRF Ventilation Sensible Heat Ratio and Latent Heat

Ventilation and VRF Sensible Heat Ratio

Ventilation for VRF Systems Ventilation (outside air) can create havoc on occupant comfort if your VRF system isn’t sized or capable of handling the...
How to Calculate Total Heat Transfer Cooling Coil

How to Calculate Cooling Coil Heat Transfer

This formula will show you how to calculate the total heat transfer from a cooling coil. The calculation for this is as follows; BTUH(t)...
VRF Cost Estimating Spreadsheet

HVAC Estimating Spreadsheet

Having an HVAC VRF Estimating Spreadsheet that automates portions of your estimates saves you valuable time that you could use to make more sales. All aspects of the cost of furnishing...