The Need
“We have an HVAC design done by an installer, but we are not really satisfied with the system they have suggested- it seems to us like more than is needed for the size and energy efficiency of the house we’ve designed. Would your team be able to provide us with an HVAC spec for the mini-split heat pumps?
Our hope is to heat and cool the house with mini-splits: probably either Daikin or Mitsubishi. We think one unit in the basement, located on the angled wall of the bathroom, one on the first floor, and one unit with two heads on the second floor.”
Full HVAC Design – Deliverables will include:
- Manual J, Load Calculation: We will complete an energy model to determine the amount of heating and cooling requirements the building has. We will generate reports that will show the heating and cooling loads for all zones within the building.
- Manual S, Equipment Selection: Based on the calculations generated from the energy model, we will select properly sized equipment, and will produce a written specification for all heating, ventilation and air conditioning equipment. This will also include performance and installation specifications for the duct system.
- Manual D, Duct Design: For any ducted systems in the building, we will design and lay out a properly sized duct system, including registers, to fit within the structure of the building, which will be represented by a single-line diagrammatic scalable floor plan. For ductless systems, we will address distribution issues to ensure that each zone gets the proper amount of heating and cooling.
- Mechanical ventilation requirements and specification (for low load designs Ventilation system may serve as distribution system)
- 2220 Sqft 2 Story with finished basement Single Family Home
- R-19 Exterior Above Grade Walls
- R-12.5 Below Grade Superior Wall System with additional R-7.5 Interior Insulating System
- R-49 Roof Attic Insulation
- Planned 1.5 ACH 50
Entire House:
- Heating – 21009 Btuh
- Cooling- 11611 Btuh
Basement Zone:
- Heating- 4917 Btuh
- Cooling – Sensible-2862 Btuh
- Latent- 404 Btuh
- Total – 3266 Btuh
1st Flr Zone:
- Heating-8094 Btuh
- Cooling- Sensible- 4472 Btuh
- Latent -160 Btuh
- Total- 4633 Btuh
2nd flr Zone:
- Heating – 7997 Btuh
- Cooling – Sensible-4166 Btuh
- Latent- 333 Btuh
- Total- 4500 Btuh
Required Ventilation – 63 CFM
What We Designed/ Specified
Configure
- Heating and Cooling (Optional Auxiliary Heating):
- One 2 TonDaikin Aurora Multi-Zone Variable Speed Inverter Heat Pump (3 Zones)
- Basement Zone – One centrally located 7000 Btu indoor ductless wall mounted -unit
- 1st Floor Zone- One centrally located 9000 Btu indoor ductless wall mounted unit
- 2nd Floor Zone- One centrally located 9000 Btu indoor ductless wall mounted unit
- Auxiliary Distribution
- Variable speed transfer fans on the bedrooms, TV Room and Storage Room
- Auxiliary Dehumidification and Ventilation:
- Semi Ducted (One supply and one return per floor) UltraAire 120 H Ventilating Dehumidifier (Supply Only Ventilation)
