HVAC (44)

Featured Discussions

AC exhaust up chimney

We are looking at getting a portable AC unit. Is it possible to vent the heated exhaust air into a fireplace that will exit up and out the…

Started by Bill BoltonLatest Reply

VRV or VRF ?

What’s the difference between VRV and VRF? Many people who ask this question, mistakenly interpret it as 2 different HVAC technologies. Ac…

Started by ofer ben -nathanLatest Reply

ERV in need of backflow preventer.

I installed an ERV on my last job with the intake and exhaust utilizing 6" round hard duct.  I have no problem locating an exhaust vent cov…

Started by Elizabeth GuinnLatest Reply

Discussions Replies Latest Activity

AC exhaust up chimney

We are looking at getting a portable AC unit. Is it possible to vent the heated exhaust air into a fireplace that will exit up and out the…

Started by Bill Bolton

2 Jan 29
Reply by Thomas Ailstock

VRV or VRF ?

What’s the difference between VRV and VRF? Many people who ask this question, mistakenly interpret it as 2 different HVAC technologies. Ac…

Started by ofer ben -nathan

0 Jan 18

Does altitude affect AFUE? or just the input/output BTUs?

I searched and searched and searched yesterday for an answer to the question "Does altitude affect AFUE?" but did not come up with any defi…

Started by Rodney Fox

25 Jul 15, 2015
Reply by Morgan M Audetat

ERV in need of backflow preventer.

I installed an ERV on my last job with the intake and exhaust utilizing 6" round hard duct.  I have no problem locating an exhaust vent cov…

Started by Elizabeth Guinn

7 Jun 5, 2015
Reply by Morgan M Audetat

Using Two Exhaust Fans with AirCycler g2/FanConnect

A customer of ours recently asked if it was possible to operate two exhaust fans in two different bathrooms with the AirCycler g2 and FanCo…

Started by Carly@AirCycler

0 Mar 3, 2015

Getting Balanced Ventilation with the AirCycler g2-k

We spoke to a lot of people at RESNET 2015 about balanced ventilation so we wanted to share here how it can be achieved with the AirCycler…

Started by Carly@AirCycler

0 Feb 19, 2015

Proper means to "plug" flue pipes after testing gas appliances.

I have seen metal "plugs" (and this may not be the correct term) used for the holes that are drilled in vent pipes, in order to test combus…

Started by Patrick Michaelyan

26 Jan 29, 2015
Reply by Andrew Aliferis

How does Cycles Per Hour affect real world AFUE?

Some claim that modern furnaces have minimized off cycle losses to the point they no longer matter. Oversizing has become a comfort issue r…

Started by Bob Blanchette

12 Dec 30, 2014
Reply by Bradford E. White

Underperforming? Energy Efficiency of HVAC Equipment Suffers Due to Poor Installation

Hello all, A search of the site seems to indicate this recently published study from NIST has not made an appearance, so here's a link to…

Started by Steve Waclo

4 Dec 4, 2014
Reply by Robert Zockoff

Dirty Sock Syndrome in high efficiency HVAC units

I was recently told my new HE HVAC unit has the dreaded dirty sock syndrome.  Never had this problem with the old unit.  My research shows…

Started by Ti Mougne

12 Nov 17, 2014
Reply by Hal Skinner

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