Client: Davis Family
Location: Meech Lake, Gatineau Park, QC
Completion Date: October 2024
Services Provided: Demolition, Permit Drawings, New Construction, In-Slab Radiant Heating, Air-to-Water Heat Pump, HRV, and Refrigerant AC System
This project involved the demolition of an existing seasonal cottage on Meech Lake and the construction of a new, four-season home designed for year-round comfort and energy efficiency. MNE Energy coordinated the complete scope of work, including demolition plans, permit drawings, and the installation of advanced HVAC and heating systems tailored for the challenging environment of Gatineau Park. Given the location’s natural beauty and environmental restrictions, the project required careful planning, collaboration with multiple authorities, and a design that seamlessly integrates with the local landscape.
The project presented a series of significant challenges, including the need to work with multiple authorities having jurisdiction (AHJs), such as the National Capital Commission, local municipalities, and environmental agencies overseeing Gatineau Park. The approval process was complex and required compliance with various environmental and building regulations due to the sensitive nature of the location. Additionally, the presence of bedrock necessitated specialized excavation techniques to prepare the site for a foundation capable of supporting a four-season home with in-slab radiant heating and modern amenities.
MNE Energy’s approach to this project was methodical and multi-faceted, addressing both the technical and regulatory requirements of building in Gatineau Park. Key components of the design and construction process are outlined below:
1. Permit and Coordination Drawings:
Due to the involvement of multiple government agencies and environmental regulations, the permitting process required extensive coordination and specialized drawings. MNE Energy prepared detailed demolition and reconstruction plans that outlined the scope, methods, and environmental protections necessary for the project. Each set of drawings was customized to address the requirements of the various AHJs, covering aspects such as erosion control, waste management, and site restoration.
Our team worked closely with environmental consultants to ensure that the project met conservation requirements, preserving the local habitat and minimizing disruptions to the natural surroundings. By coordinating with stakeholders early in the planning phase, we were able to navigate the permitting process effectively and maintain compliance with all regulations.
2. Site Preparation and Bedrock Excavation:
The site posed a unique challenge due to the presence of bedrock, which required excavation to establish a stable foundation. Specialized machinery was brought in to break and remove sections of rock, allowing for the construction of a reinforced concrete slab capable of supporting the radiant heating system. MNE Energy collaborated with geotechnical engineers to assess soil stability and bedrock characteristics, ensuring that the excavation and foundation design were safe and sustainable.
Once the bedrock was removed and the site leveled, a layer of high-density insulation was installed beneath the foundation to improve the thermal efficiency of the radiant heating system. This insulation minimizes heat loss into the ground, enhancing the efficiency and performance of the in-slab heating system.
3. In-Slab Radiant Heating System with Air-to-Water Heat Pump:
The primary heating system for the home is an in-slab radiant heating system powered by an air-to-water heat pump. This setup provides even, consistent warmth across the home’s floors, reducing temperature fluctuations and increasing comfort. The heat pump draws ambient heat from the air, transferring it to water, which is then circulated through PEX tubing embedded in the concrete slab. MNE Energy selected a high-efficiency air-to-water heat pump with variable-speed technology, which adjusts output based on outdoor temperatures, ensuring optimal performance even in cold weather.
The radiant heating system includes multiple zones, each with independent controls, allowing for customized temperature settings throughout different areas of the home. The system design also incorporates a backup electric heater, providing additional reliability during extreme weather conditions. This backup feature is automatically triggered when the heat pump requires additional support to maintain desired indoor temperatures, ensuring the home remains comfortable year-round.
4. Heat Recovery Ventilation (HRV) System:
To maintain excellent indoor air quality while minimizing energy loss, an HRV system was installed. The HRV captures heat from stale indoor air, using it to precondition fresh air drawn from outside. This exchange helps reduce the load on the heating system by maintaining consistent indoor temperatures without excessive energy use. MNE Energy placed the HRV unit centrally, ensuring efficient air distribution to all living spaces.
The HRV system includes high-grade filters and operates with a multi-speed fan, allowing it to adjust airflow based on occupancy and indoor air quality needs. Exhaust points are strategically placed in bathrooms and the kitchen to remove moisture and odors, while fresh air is delivered to high-occupancy areas like the bedrooms and main living spaces. The system is also equipped with humidity sensors, which adjust ventilation rates based on indoor moisture levels, preventing condensation and improving comfort.
5. Refrigerant-Based Air Conditioning:
The home’s cooling needs are met by a refrigerant-based air conditioning system, which works in tandem with the heat pump to provide efficient temperature control. This system was integrated into the home’s HVAC layout, utilizing insulated ductwork to distribute cool air effectively. The air conditioning system is connected to the same thermostat as the radiant heating, enabling the homeowner to control heating and cooling from a central interface.
The design of the air conditioning system was optimized for Meech Lake’s summer climate, ensuring that the home remains cool and comfortable even during warmer months. To further improve efficiency, the AC unit is equipped with variable refrigerant flow technology, which adjusts cooling output based on the indoor temperature and occupancy levels, enhancing both comfort and energy savings.
6. Well and Septic System Design:
Given the rural location, the home operates independently of municipal water and sewer services. MNE Energy designed a well and septic system tailored to the specific needs of the property. The well is equipped with a submersible pump and pressure tank, which provide consistent water pressure to meet household demands. A multi-stage filtration system ensures that the water quality remains high, addressing both sediment and potential contaminants.
The septic system was engineered to handle the wastewater generated by the four-season home. A concrete septic tank and drainage field were installed, designed to comply with local environmental regulations and accommodate the family’s water usage. Regular access points were included in the design to facilitate easy maintenance, prolonging the system’s lifespan and ensuring reliable operation over time.
The Meech Lake four-season home was completed on schedule, providing the Davis Family with a comfortable and energy-efficient residence. The radiant in-slab heating, powered by the air-to-water heat pump, delivers consistent warmth even in extreme winter conditions, while the HRV and refrigerant AC systems maintain excellent indoor air quality and comfort. The well and septic systems function independently, supporting a self-sufficient and sustainable lifestyle in a beautiful natural setting.
Post-construction tests confirmed that the home’s heating, cooling, and ventilation systems operate efficiently, meeting the energy and comfort goals established during the design phase. The family has reported satisfaction with the heating system’s even distribution, as well as the ease of managing indoor temperatures with the integrated thermostat. The successful navigation of complex permitting requirements and environmental regulations underscores MNE Energy’s expertise in handling challenging projects, particularly those situated in environmentally sensitive areas.