GMcD, I agree. Your post outlines exactly my position on this matter. I don't like the idea of bringing in uncontrolled outside air through the envelope for fear of mold and decay issues down the road. I suppose I could follow the lead of the Passivhaus or building science community and...
Hi All,
I'm in Eastern Canada and wonder what you all think of using exhaust fans to provide the ASHRAE 62.1 required fresh air for small commercial tenant fit-up spaces? Some here think providing fresh air through window/door leaks is fine, as long as the heat source for the space can...
Hi all,
I have a client who is building a car dealership (in Atlantic Canada) with an attached automatic carwash bay to wash every car that goes through its service department. The vehicle is driven into the service drive-through for write-up, then either to service bays or to the carwash (not...
HI All,
I have a single story building with a combustible attic that will be protected with a dry pipe system. The system is currently being installed. The inspector test valve will be located in an occupied office space, where it will drop from the attic above a T-bar ceiling and discharge...
Most manufacturers offer N. America and S. America options for contacts, however, the Caribbean is uniquely between the two. Most mfr's do not seem to clearly indicate where someone in the Caribbean should go to find information. There are a few local manufacturers, but I prefer to stick with...
Hi All,
I'm designing systems for a hotel/resort project in the Caribbean and would like a bit of help finding available equipment with 220V/50Hz. Does anyone have a contact(s) for manufacturer's rep down there (preferably global manufacturer like Mitsubishi, LG, Daikin, Carrier)?
Also, if...
I would normally agree with using the FCU's in each room, however in this case the massage rooms are so small that the exhaust rate is practically equal to the airflow for room conditioning. Therefore, since the exhaust must operate continuously during operating hours, so then does the tempered...
Firstly, yes I do mean a real massage (ahem) in a real health spa. [tongue].
We have a health spa project where we have multiple massage rooms, hotel rooms, pool, therapeutic pools, aerobics, exercise, etc. The massage rooms pose a bit of a grey area for me as I haven't personally ever been...
Hi All, I'm trying to verify my opinion of domestic water pressure in a 93 ft high office building serving mainly just washrooms over the 8 floors of the building. The city water pressure at the suction side of the pressure booster varies between 50-60 psi. The required pressure at the 8th...
If you haven't already figured out your problem, you should contact the HAP helpers. They are extremely knowledgeable because they are (or at least used to be) the people who developed the software. Call the number below, leave a message and they usually respond within a day or two. I have...
I downloaded the 3E program and the result indicates the nearly identical Btu/h losses for both bare and insulated copper and PVC at 140F DHW temp. I didn't really expect that result, but I'm wondering if I should have expected it! Given enough time, the pipe will heat up to the same temp...
Hi All,
I have a hotel project in Eastern Canada where the contractor is proposing to use Xirtec 140 Sched 80 PVC piping for the cold, and Corzan CPVC for hot and hot water recirculation lines that would be UN-INSULATED throughout the building. This building is not classified as a high building...
Thanks for your responses. My initial thought was that 18" was too small for personnel entry, so you've supported that assumption. It shouldn't be that hard for me to provide the access hatches on each floor, so we'll just add that to the expense of the project, I guess.
Thanks for all the...
Hi All,
I have a vertical grease duct serving commercial kitchen equipment that is 18x30 running up through 5 stories to the roof and wondered if that is too small to permit "personnel entry" for cleaning as per Section 7.4.2.1, Vertical Ducts in NFPA 96-2004, or elsewhere? I.e., will I need to...
I have a condo project here in Eastern Canada with central hot and chilled water systems serving 100 condos. I'm using fan coils for the cooling of each condo and would like to use the fan coils for the heating as well, but have reservations about the comfort of air heating in residences in...
