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  1. Heated Garage Humidity remediation in cold climate

    HVAC
    I recently built a garage, slowly learning a few mistakes along the way. Having humidity issues and when it is cold getting the large drywall seam cracking (assuming from humidity as well). The garage is heated by a natural gas radiant heater. lately been keeping the garage at about 14 degrees...
  2. Hi from Montreal

    New Member Introductions
    Hi everyone, Glad to find a community that deals with the challenges of home improvement. I'm in the process of redoing the range exhaust ducting in my building as well as installing HRVs and relocating my heat pump. I'm sure I'll find good tips on this forum. Cheers, Ed
  3. HRV switches not working

    HVAC
    Greetings! I recently bought a 2009 townhouse with a LifeBreath rnc155 HRV unit. It works on very low speed when I adjust the humidistat main control. (when its running, it barely pulls the smoke from incense into the vent). However each of 4 bathrooms have 'fantimer' switches in them that...
  4. Venmar EVO5 500 HRV/Furnace Interlock

    HVAC
    So I recently purchased this Venmar unit on sales at Lowes (EVO5 500). I called the Venmar tech line prior to purchasing to see if the unit had a set of N.O. contacts so I could interlock it with my furnace. They told me yes, it has a set of N.O. and N.C. contacts. I got it all installed and...
  5. Thermostat - Nest install

    HVAC
    Hello: I have a Amana AMVC 96 2 stage furnace, and VisionPRO IAQ... along with an Aprilaire Model 800 humidifier and Venmar Constructo 2.0 HRV. I live in Ottawa Canada, and the HRV also vents the bathrooms (only ventilation). I haven't been loving the IAQ, (have replaced the original...
  6. HRV Duct Sizing Question with Damper

    HVAC
    I'm trying to design an HRV ducting system and I had a few theoretical questions in regard to using a damper. I'd like to have two main trunks that come off the HRV: trunk A and trunk B. These two trunks will be pulling the air OUT of the rooms. Trunk A will serve a kitchen and two bathrooms...
  7. Lennox G61MPV - is a very slow fan speed possible

    HVAC
    I have a Lennox G61MPV-36B-071-12 gas furnace. As best I can understand from the manual the low speed fan air flow is around 700 cfm. That causes quite a draft of cold air when the fan runs (without heat) by itself, pulling air in from outside. As a result, we don't use it as a means of fresh...
  8. HRV Maintence

    HVAC
    I have a Venmar Constructo 1.5 HRV and would like to get some advice on cleaning the motor blades. I have not taken off the housing before and am not sure I want to do this in case I mess it up. Can a can of compressed air like the ones they use to clean the back of PC's etc work to clean the...
  9. Manual D Calculation - did I do this right?

    HVAC
    Background: I recently bought a Fantech 3005R Heat Recovery Ventilator (HRV). I also purchased the ACCA Manual D book, so I could perform the duct sizing myself. The following calculations are just for the fresh air supply into the house. The Fantech has EBM fans(which I believe are ECM), and...
  10. Ducting problem for an HRV

    HVAC
    Ok guys, Here's the problem. I am retrofitting an old house with an HRV and cannot decide the best way to run the stale-air-ehaust. Here's what I'm planning to do: HRV located in basement of bungalow, run one 12"x3" wall stack up to the attic, and then, using a 12x3 to 6"round stack boot...
  11. Approaching need for HRV

    HVAC
    I have begun insulating my attic and sealing air loss along my rim joist and behind baseboards in my 35 year old home. Before and after Energy audits with blower door tests show I have already reduced my air change rate from 6.5 to 3.5 per hour. :eek:I have also blown in the attic to R50 and...
  12. HRV Duct Sizing?

    HVAC
    I am in the planning stage of putting in a Heat Recovery Ventilator (HRV) in a two-story colonial with basement. I have existing central heat/air located in the basement with a full set of supply and return ducts in every room (except none in the unfinished basement, and no return ducts in the...
  13. Cut top and sole plates when running HVAC ducts?

    HVAC
    I am in the planning stage of putting in a Heat Recovery Ventilator (HRV) in a two-story colonial with basement. I have central air located in the basement with a full set of supply and return ducts in every room (except none in the unfinished basement, and no return ducts in the two bathrooms...
  14. HRV exhaust

    HVAC
    Just thinking out loud. Saw elsewhere on the internet that the exhaust of an HRV should not be directed to a garage. I'm in the midst of designing a system for a new residence in Maine and think the addition of some heat by exhausting to a attached garage (that has full eave vents) is NOT a bad...
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