Project NeutralRetrofit Strategy

Vincent Davenport ◊ Daniel Hofland ◊ Lukas Notten

Archetype:3 Storey

Semi-DetachedVictorian (1890)

Current HouseTotal GHG Emissions: 26.2 tonnes/yearYearly Energy Usage: 393,000 MJYearly Energy Cost: $6,630.00Energy Intensity: 874 kWh/m2 (per year)

26.2 t CO2/yr

9.1 t CO2/yr

65% reduction in GHG emissions

Stage 2 - Hydronic Radiant HeatingTotal GHG Emissions: 9.1 tonnes/year (65% decrease)Total Implementation Cost: Stage 1 + $7,200 = $33,800Yearly Energy Usage: 109,000 MJ (72% decrease)Yearly Energy Cost: $2,260 (66% decrease)Yearly Savings: $4,360Energy Intensity: 243 kWh/m2 (per year) (72% decrease)

Stage 1 - Insulate and VentilateTotal GHG Emissions: 9.8 tonnes/year (63% decrease)Implementation Cost: $26,630Yearly Energy Usage: 113,000 MJ (71% decrease)Yearly Energy Cost: $2,380 (64% decrease)Yearly Savings: $4,240Energy Intensity: 251 kWh/m2 (per year) (71% decrease)

Kitchen

Bedroom Bedroom

Bedroom

BathroomLivingRoom

ERVAHU

return

supp

lyKitchen

Attic

Bedroom Bedroom

Bedroom

Bathroom LivingRoom

ERV

supp

ly

return

Attic

Closed-cell spray

foam

Air/Vapor

Barrier

Hot water heater

Hydronicradiant

panel

Hydronicradiant

fins underfloor

Stage 1 Description: Improve entire building envelope toachieve 1 ACH (@ 50 Pa). Mechanical ventilation will beprovided by an ERV. Supplementary heating and cooling provided by current AHU.

Stage 2 Description: Remove current AHU and hot water heater. Mechanical ventilation will be provided by an ERV.Supplementary heating will be provided by a hydronicradiant heating system to further reduce GHG emissions.

Pre-Retrofit Description: 23 ACH (@ 50 Pa). AHU with a natural gas furnace and a natural gas water heater.

Stage 1

Stage 2

7 year payback at an interest rate of 6%