Hello fellow wizards, In this post I'm looking for help on inexpensive ideas for cigar smoke removal and fresh air intake. I've done some research, but first here's the build out of my finished basement room. Long basement is geneprally cold and unheated, one Owens Corning finished room...

Getting ready to install a gable vent fan. Is it ok to over or under size a fan? My CFM's required are 897. Will an 800 CFM work or do I need to jump up to 1000 CFM's? I have plenty of venting for fresh air intake via soffit and ridge vents. The way I calculated was 30x26 garage=780sf x 1.15...

Hi, I wanted to get a range hood that vents to outside and we do lot of international cooking with various spices. I'm trying to see what's the maximum CFM I can install without having to install a make-up air unit. Thanks :)

Having the furnace replaced with the split system. Many sources tell me that bigger isn't better, and I will experience less efficiency despite the SEER rating. Any opinions on this?

I have a Carrier 59TP5A two stage, 95% efficiency furnace and which currently has the following motor leads and connections: COM - GREEN HI HT - BLUE COOL - GRAY LO HT - RED SPARE2 - ORANGE SPARE1 - YELLOW According to Carrier documentation, the colors represent the following fan speeds (at...

Hey There, I'm spray painting with cans of paint in a 12' by 20' one car garage with a 7.5' high ceiling. The fumes are quite toxic and need to be removed! I've read that you take your all 3 measurements and multiple them together to get your cfm for the room. Then buy a fan according to the...

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...

As far as CFM's required. I understand that it's the cf. of the room times a minimum of 4 divided by 60 for the formula. My room is 1206 cf. so according to the formula; air circulated 4x per hour = 80 CFM air circulated 6x per hour = 120 CFM All of the equipment will be in the room and it...

My furnace has the ability to set the heating CFM since its full modulating and full variable speed blower, it can go as low as 800 CFM and as high as 1080 CFM (it's a 60K BTU/h furnace) the temp change range is 35 deg F to 65 deg F max rise. what is the best area to be for the rise? I have an...

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...

Found a good deal on this compressor at HF, $39.99 after coupon. The specs list 0.6 cfm at 90 psi and the title says that it's good for inflation, stapling, brad nailing, and air brushing. All of the buying guides that I've seen suggest that around 0.3-0.5 cfm is what you need for a brad nailer...

My new home is being built very 'tight'; icynene and everything sealed up. The HVAC has been engineered with this in mind, and a 3rd party inspector is checking it all out. With that in mind, I need to ask for help in choosing a range hood. We'll have LP and a 30" range. We are average cooks...

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...