The $6,500 Fireplace That Voids a Silver Rating
Northgate Builders has registered a 3,200 sq ft single-family house in Climate Zone 5 under LEED v4.1 Homes, performance path. The Green Rater's preliminary scorecard totals 51 points: Energy and Atmosphere 18, Indoor Environmental Quality 9, Water Efficiency 7, Materials and Resources 8, Location and Transportation 6, Sustainable Sites 3. The Silver threshold is 50. During design review the rater flags a 40,000 Btu/h unvented gas fireplace in the living room, open to conditioned space, with no outdoor air intake. The sales team has already printed 'LEED Silver' on a brochure, and the fireplace is a $6,500 upgrade selected in a similar model by 14 buyers. The HVAC contractor proposes adding a CO alarm beside the fireplace and claiming the unit as an innovation strategy. Framing starts in five weeks. The builder wants to know whether 51 points is enough and what the cheapest compliant path to Silver looks like.
1. Can the project keep the unvented fireplace and still certify at Silver by adding points elsewhere? Explain how prerequisites and credits interact in the Homes rating system.
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No. The 51 points are irrelevant while a prerequisite is unmet.
Why the point total does not rescue the project
- Prerequisites are eligibility gates. They carry zero points and must be satisfied before any credit is scored. A project that misses one is not certified at any level, including Certified, no matter how far above 50 it sits.
- Unvented combustion appliances open to conditioned space are exactly what the combustion-venting prerequisite exists to prohibit. A CO alarm is a required backup device, not a cure; the alarm does not make the appliance vented or sealed.
- Innovation credits reward strategies that go beyond the rating system. They cannot be used to waive or substitute for a mandatory requirement, so the contractor's 'claim it as innovation' idea fails on two counts.
- Points in Homes are earned once per project, not once per buyer upgrade. Fourteen buyers choosing a fireplace does not multiply or excuse anything.
The framing to give the builder Prerequisites define the floor of performance; credits rank performance above that floor. The real question is not 'are we above 50?' but 'are all prerequisites closed, and how much documentation margin sits behind the 51?' With several credits still unverified, a 51 is not a buffer - it is a projection. Treat the fireplace as a prerequisite failure and fix it before talking about Silver, otherwise the printed brochures become a liability rather than a marketing asset.
2. The builder narrows it to two real options: (a) swap to a sealed-combustion direct-vent fireplace for about $4,000; (b) delete the fireplace and install a heat-pump water heater for about $3,200. A third idea is to keep the fireplace and find six points elsewhere. Evaluate all three.
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Option (c) - keep the fireplace and buy six points elsewhere: reject. It is not a cost question. The prerequisite failure stands regardless of the score, so the six points buy nothing. Eliminate it from the analysis so the builder stops pricing an impossible path.
Option (a) - direct-vent replacement, ~$4,000
- Restores compliance without changing the scorecard, because combustion venting is a prerequisite, not a scored credit.
- Preserves the amenity buyers are paying $6,500 for, which matters if the upgrade drives sales in this model line.
- Low schedule risk: a catalog change before framing, no re-design of the wall assembly beyond the vent termination and clearances.
- Requires re-running the HERS model only to confirm no penalty from the changed appliance.
Option (b) - delete fireplace, add heat-pump water heater, ~$3,200
- Cheaper by about $800 and may add Energy and Atmosphere points through a lower HERS index, potentially building a buffer above 50.
- But it removes a revenue item and needs a condensate drain, dedicated electrical capacity, adequate closet volume, and return-air clearance. In a garage location it also needs freeze protection.
- Any change to the water heater triggers re-rating and re-documentation, which costs rater time even when the equipment cost is low.
Judgement If the goal is Silver with minimum risk and the 51-point projection is solid, option (a) is the lower-variance choice: it closes the prerequisite and preserves the product. Option (b) only wins if the team genuinely needs the extra energy points for margin, or if the water heater was already being replaced for other reasons. Do not choose (b) purely because the invoice is $800 smaller - the rater re-modeling and the lost upgrade revenue usually erase that difference.
3. Regardless of which option is chosen, what should the builder confirm with the rater and the HVAC contractor before finalizing plans, and what should happen to the brochure?
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Confirm with the rater before drawings are final
- The revised HERS model, including the changed appliance, so the scorecard projection is based on as-designed equipment rather than the old assumption.
- The specific documentation the rater will collect for combustion venting: appliance type, vent termination location relative to operable windows and air intakes, and the CO alarm locations. Missing one photo can cost a verification cycle.
- If the heat-pump water heater is chosen: how it is modeled, where it sits relative to conditioned space, and whether the change disturbs the hot-water-distribution assumptions already counted in Energy and Atmosphere.
- Whether any current credit depends on the fireplace wall assembly - for example, insulation or air-barrier continuity that the new vent penetration would interrupt.
Confirm with the HVAC contractor
- That the direct-vent unit is sealed combustion with its own outdoor air supply, and that clearances to the property line and to any fresh-air intake are met.
- That the CO alarms are installed per the manufacturer's and code requirements, and are included in the verification checklist rather than added at punch list.
The brochure Pull it. A project under registration may be described as registered or designed to achieve a rating, not as certified. Certification is awarded only after final verification, the Provider's review, and the rating body's decision. Reprint with precise language and the correct trademark treatment once the certificate is in hand. This is not a paperwork nicety: an unearned certification claim in sales material is a consumer-protection exposure and a misuse of the rating system's marks.