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Last edited by topcheese on May 14th, 2021 10:29 am, edited 2 times in total.
May 11th, 2021 7:22 pm
May 11th, 2021 7:48 pm
May 11th, 2021 7:54 pm
Sorry, but I'm somewhat confused,
May 11th, 2021 8:03 pm
May 11th, 2021 8:12 pm
May 11th, 2021 8:32 pm
May 11th, 2021 8:44 pm
When I read this, I was like damn your lucky. I never had enough money on hand to build a home from scratch to how I want it (bank wouldn't allow me).
May 11th, 2021 9:55 pm
May 11th, 2021 10:10 pm
May 12th, 2021 12:09 am
May 12th, 2021 6:50 am
I think it's you, cause I can think of a dozen people who built their home from scratch and then hired sub trades for work they couldn't/didn't want to do.
May 12th, 2021 7:14 am
May 12th, 2021 8:03 am
Codes are made on assumption that things are operated to the max to protect knowledgeable homeowners from themselves. You just can't say oh you'll probably never do it but it happens one day that you do do it.Toukolou wrote: ↑ Imo, I would reevaluate your need for ventilation requiring a 10" vent. Your range may be rated for xx BTU hence the need for xx CFM, but that is based on you running every burner, full blast, without anything on them, an unlikely scenario.
Even if you go over 400CFM (600-750), I don't think MUA is really needed. Most (all?) gas appliances in the home nowadays are either direct vent or mechanically exhausted. I think you'll be fine with a less powerful hood, and if you ever need to run it full blast, just open the window a crack.
What I would consider however, is going for a less powerful but wider hood (42") to help with the fume/heat/smoke capture. Just my 2c.
And as far as I know, there is no building code requiring make-up air above 400CFM, might be recommended, but not required.
May 12th, 2021 8:52 am
topcheese wrote: ↑ Building code in Ontario definitely requires MUA over 400 CFM. New homes are so air tight it causes a vacuum that can suck radon out of the ground, mess with other gas appliances etc
I do agree the standard XXX btu / 100 formula is a little overkill (I would need 1300 CFM), but I’m just going to 600. I figured it worth the little extra power, especially with an open floor plan so we don’t smoke the place out.
It’s also up for debate (just not in this thread. People are still too disturbed by the fact I said I’m building a home) whether or not gas ranges are “safe” in comparison to electric. So every little bit of ventilation I’ll take.
The model I chose requires 10” ducting.
Thanks for the input.
Hood is on the exterior wall. It will vent up and out.
"Then, in the 2018 IRC, the makeup-air provisions were tweaked. The hazard first spelled out in 1971—the presence of fuel-fired appliances inside the home—reemerged. The requirement to provide makeup air is now tied to the actual danger. But while the risk identified all those years ago hasn’t changed, the available appliances have. Appliances that draft naturally are still around, but are incredibly inefficient because they use heat generated by the appliance as the mechanism to carry the combustion products to the atmosphere. If you have one of these appliances—be it a furnace, a boiler, a water heater, or something else—and a range hood capable of exhausting more than 400 cfm, you need makeup air.pootza wrote: ↑ Codes are made on assumption that things are operated to the max to protect knowledgeable homeowners from themselves. You just can't say oh you'll probably never do it but it happens one day that you do do it.
Supplemental make up air for range hoods might not be in the building code but then they might be in the installation manual for the range/range hood and you would have to follow that because you have to install things as per manufactures instruction and that is in the building code.
May 12th, 2021 8:56 am
May 12th, 2021 9:00 am
May 12th, 2021 9:17 am
Toukolou wrote: ↑ As for Ontario Building Code, I'd love to see where it specifically says MUA is required by code. Manufacturers are largely silent on the topic. If it actually was a Code requirement, they would be required to point this out to buyers or face a significant liability if they didn't.
May 12th, 2021 9:36 am
Who decides? What are the parameters of "adversely affected"? Building codes are typically very clear. "Railing needs to be x inches from the ground". Not sure how enforceable, or useful, codes that are open to interpretation can be.pootza wrote: ↑ 6.2.3.11. Make-up Air
(1) In ventilating systems that exhaust air to the outdoors, provision shall be made for the admission of a supply of make-up air in sufficient quantity so that the operation of the exhaust system and other exhaust equipment or combustion equipment is not adversely affected.
May 12th, 2021 9:47 am
May 12th, 2021 10:01 am
Again, I'd love to see a specific code saying xx CFM requires MUA. What are the OBC parameters for requiring MUA?pootza wrote: ↑ 6.2.1.1. Good Engineering Practice
(1) Heating, ventilating and air-conditioning systems, including related mechanical refrigeration systems, shall be designed, constructed and installed to conform to good engineering practice appropriate to the circumstances such as described in,
(a) the ASHRAE Handbooks as follows:
(i) Fundamentals,
(ii) Refrigeration,
(iii) HVAC applications,
(iv) HVAC Systems and Equipment, and
(v) ANSI/ASHRAE/IESNA 90.1, "Energy Standard for buildings Except Low-Rise residential Buildings",
(b) the CSA F280, "Determining the Required Capacity of residential Space Heating and Cooling Appliances", and the outside winter design temperatures shall conform to MMAH Supplementary Standard SB-1, "Climatic and Seismic Data",
(c) CAN/CSA-F326-M, "residential Mechanical ventilation Systems",
(d) the nfpa Fire Codes,
(e) the HRAI Digest,
(f) the Hydronics Institute Manuals,
(g) the SMACNA Manuals,
(h) ACGIH, "industrial Ventilation Manual",
(i) CAN/CSA-Z317.2, "Special Requirements for Heating, ventilation, and Air Conditioning (HVAC) Systems in Health Care Facilities",
(j) CCBFC NRCC 38730, "Model National Energy Code of Canada for Buildings",
(k) CCBFC NRCC 54435, "National Energy Code of Canada for Buildings", and
(l) EPA/625/R-92/016, "Radon Prevention in the Design and Construction of Schools and Other Large Buildings".
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