EP 22 · 2022-01-17 · 57:33
Passive House vs Net Zero: The Full Canadian Certification Ladder with Casey Grey (The Conscious Builder)
Ottawa passive-house builder Casey Grey unpacks the full high-performance certification ladder — from building code to passive house — and makes the case that building-science training, not just better certification, is the real lever for industry change.
CG
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// CHAPTERS — TAP TO JUMP THE PLAYER
0:04Introduction and guest background — Host introduces Casey Grey, founder of The Conscious Builder (Ottawa); award-winning sustainable building company, podcast and YouTube channel, ~two decades in construction.1:49Origin story — trades over engineering, first apprenticeship — Casey recounts choosing the trades over engineering in high school, landing a 7-year apprenticeship building a large Ottawa River mansion, and eventually going out on his own.7:30The personal-development pivot and brand identity — Tony Robbins events (UPW, Date with Destiny) shift Casey's thinking; discovering he was expecting a son crystallises the mission to lead by example. Introduces 'environment over willpower'.10:45Green-building certification ladder explained — Casey walks through the performance hierarchy: building code (legal minimum), Energy Star (~20% better), LEED (materials + energy, commercial-heavy), Net Zero (CHPA, ~30-40% better), R-2000 (~50%), Passive House (~80%+). Clarifies that certifications are third-party verified.13:40Passive house deep-dive — certification, envelope, orientation — PHI vs. PHIUS distinctions; volume advantage for multi-unit buildings; orientation's direct impact on whether certification is achievable without upgrading assemblies; clarification of passive-solar vs. passive-house terminology.18:20Wall assemblies, vapour permeability, and ICF — Moisture-management principles for thick assemblies (vapour-permeable materials, drying to both sides); window specification (SHGC, thermal breaks, fiberglass frames); ICF caveats and greenwashing around R-value claims; integrated design process (IDP).24:10Mechanical systems — ERV vs HRV, range hoods, indoor air quality — Why elimination of bathroom fans and oversized range hoods is correct in tight houses; ERV vs. HRV core difference (enthalpy/moisture transfer); calculation showing 1000-cfm range hood wastes 89,000 BTU/hr at -25°C; buildings-as-systems framing; IAQ ranked by EPA as top-5 health risk.30:30Net zero by 2030 — technology vs. training gap — Casey argues Canada will technically reach net zero by 2030 on the back of solar panel improvement rather than fundamentally better construction practice; flags the existing housing stock as the bigger problem; pivots to indoor health as the under-discussed dimension.36:40Net zero vs. off-grid, solar as the only practical on-site renewable — Distinctions between net-zero energy and net-zero energy ready (solar-panel readiness); why off-grid requires passive-house-level design to handle worst-case winter; heating and hot water as dominant energy loads; plug loads variable by household size.43:20The Conscious Builder Academy and industry training imperative — Casey frames training other contractors — not building more houses himself — as the highest-leverage intervention; discusses association membership filtering out 'two-tail-light warranty' competition; the multiplier effect of educating educators.51:40Closing — challenge to independent thinking and resources — Casey's closing challenge: think for yourself, question inherited beliefs. Plugs theconsciousbuilder.com, free '5 things I wish I knew before starting my business' course, and the Conscious Builder Academy upcoming marketing and team content.
// THE INTRO
Host Daniel Arsenault interviews Casey Grey, founder of The Conscious Builder (Ottawa), a company specializing in net-zero and passive-house residential construction. Over roughly 58 minutes the conversation covers Casey's trade origin story (high school construction class, 7-year apprenticeship, solo leap), the personal-development pivot that gave the business its 'conscious' brand, and a dense technical deep-dive on the Canadian green-building certification stack: building code baseline, Energy Star, LEED, Net Zero (CHPA), R-2000, and Passive House (PHI/PHIUS). Key technical territory includes wall-assembly design (vapour permeability, moisture drying, double-stud vs. ICF), window specification (solar heat gain coefficient, thermal breaks, passive-certified frames), integrated design process (IDP), ERV/HRV rationale, indoor air quality, and the net-zero-by-2030 building code trajectory. Casey closes with a call for independent thinking and plugs The Conscious Builder Academy. The episode offers genuine building-science depth rare for the Atlantic Canada show's catalog, though the guest is Ontario-based and the content is only loosely anchored to the Atlantic regional context.
// THE LESSONS
See all 12 lessons ▸Building code is the legal floor — 'the worst home you are allowed to build by law' — not a quality target; frame every project above it.
“the building code is the worst home that you're allowed to build by law”
Orient a passive-house design toward the south before specifying assemblies; the same wall spec on a north-facing lot will fail certification without upgrading windows and R-values.
“if you were to take that house and put it on the other side of the road… it would not have got passable certification”
Thick wall assemblies must use vapour-permeable materials that can dry in both directions; sealed foam inside high-R double-stud walls traps moisture and risks mould.
“it has to be something that can get wet and dry, not lose its R-value, not have mould”
Treat the building envelope as skin (perspires but does not breathe) and the ERV/HRV as lungs; eliminating random penetrations then centralising ventilation is the correct air-tightness strategy.
“we want to allow our envelope our skin to perspire but not breathe”
A 1,000-CFM kitchen range hood at -25°C expels ~89,000 BTU/hr — nearly five times the entire heating load of a 4,000-sq-ft passive house; oversized exhaust fans are both wasteful and dangerous with fuel-burning appliances in tight homes.
“you lose 89,000 BTUs per hour by running that thousand-cfm range hood”
Use the Integrated Design Process (IDP) from day one: energy advisors, building scientists, contractors, and architects must co-design, because what looks correct on paper is often impractical or expensive to build.
“you because everybody brings a different skill to the table… you need the whole team on board”
The biggest lever for industry-wide sustainability impact is training other contractors, not building more units yourself; a small specialist firm is capacity-constrained, but knowledge compounds.
“we can only do a couple houses a year… the biggest potential is to help other contractors like us”
Joining a trade association filters out the 'two-tail-light warranty' competition undercutting on price; the real competition is uninformed operators, not peer contractors at the table.
“the guys sitting around that table weren't my competition… the guys that weren't a part of the association undercutting everyone”
Tell the client the gap between theory (modelling) and reality (in-use behaviour) upfront; passive-house overheating on clear winter days is predictable and should be disclosed, not discovered post-occupancy.
“in theory what's going to happen but in reality this is likely what's going to happen based on our experience”
ICF greenwashing is real: do not accept manufacturer R-value claims; run the assembly through energy-advisor modelling software, and verify that studs are thermally continuous during installation.
“don't take the word from the ICF company about the fact that they have an R-50 wall assembly — it doesn't actually calculate that way”
Passive house is easier to certify in larger multi-unit buildings because the volume-to-surface ratio reduces air-change demands and interior party walls reduce exposed envelope.
“the larger the building, the easier it is to get passive-house certification… it's a volume thing”
Environment beats willpower: put yourself and your team in contexts that demand growth (events, associations, mentors) rather than relying on individual discipline to sustain improvement.
“environment is more powerful than willpower — if you rely solely on willpower you will lose momentum”
// CLIPS FROM THIS EPISODE
Hot take · 12:32
“ross elliott said the building code is the worst home that you're allowed to build by law”
Hot take · 14:37
“i've been on some commercial projects where the leed paperwork is like 20% of the time spent”
Hot take · 38:01
“if you turn on 1000 cfm range hood and it's -25 outside you lose 89,000 btus per hour”
All 12 lessons from this episode, on one page.
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// FEATURED BUSINESSES
The Conscious Builder Inc.
Ottawa-area custom home builder and renovator specializing in high-performance residential constructio…
Homesol Building Solutions Inc.
Building-science and energy-conservation consultancy that delivers energy modelling, air-tightness (bl…
The Conscious Builder Academy
Online education arm of Ottawa high-performance home builder The Conscious Builder, offering courses, …
// FACT-CHECKED ✓ web-verified, with sources
✓ VERIFIED
A 1,000-CFM kitchen range hood at -25°C expels ~89,000 BTU/hr — nearly five times the entire heating load of a 4,000-sq-ft passive house.
Standard HVAC formula: BTU/hr = 1.08 × CFM × ΔT(°F). At -25°C (~-13°F) with interior at 70°F: 1.08 × 1000 × 83 ≈ 89,640 BTU/hr. Mathematically correct. The comparison to a passive-house heating load is plausible (passive house peak demand ≤10 W/m2 ≈ 14,000–18,000 BTU/hr for 4,000 sq ft) but the exac…
SOURCE ▸✓ VERIFIED
Indoor air quality has been ranked by the EPA as a top-5 environmental health risk.
EPA Science Advisory Board (SAB) comparative risk studies have consistently ranked indoor air pollution among the top five environmental risks to public health. The claim is accurate as a reference to EPA SAB studies; the current EPA introduction page does not directly state this ranking but multipl…
SOURCE ▸✓ VERIFIED
Canada's building code is on a trajectory to reach net-zero energy-ready standards by 2030.
Confirmed by the National Research Council Canada and the 2020 National Building Code five-tier pathway. The 2016 Pan-Canadian Framework committed all jurisdictions to adopt a net-zero energy-ready model building code by 2030. The 2020 NBC establishes Tier 5 as net-zero ready. Casey's framing that s…
SOURCE ▸// COMPANIES & ORGS ✓ verified
The Conscious Builder Inc. ▸Casey GreyHomesol Building Solutions Inc. ▸Ross ElliottCanadian Home Builders' Association (CHBA)Passivhaus Institut (PHI)Passive House Institute US (PHIUS)Minto GroupThe Conscious Builder Academy ▸
SOURCE: podscope · public episode data · 9mVazzIFvNk