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Project: Owner/built 4,200ft2 (390m2)
renovation/new construction of a private residence.
See this page for
budgeting HVAC design fees.
Click on thumbnails below for larger images.
Figure 1. Old mechanical room during demolition. Boiler, solar
DHW tank and air handler and a few circulators were refurbished
and used in the new mechanical room.
Figure 1a. Original basement during demolition stage.
Figure 1b. Original home pre demolition (east side). Right hand side
foundation served the right hand side new construction shown in
Figure 12.
Figure 1c. Original home pre demolition (west side facing
downtown Calgary). Note solar collectors;
and basement windows for reference in Figure 13.
Figure 2. Wall detail #1, metal seam siding on 2"
Roxul on Tyvek on plywood on studs
Figure 3. Wall detail #2, IPE wood on strapping
on felt on Tyvek on plywood on studs.
Figure 4. East facing foyer framing.
Figure 5. West facing view glazing. This room
primarily heated with radiant floors and a second stage of heat
from the air handler during peak loads.
Figure 6. Radiant heated north wall of the foyer. This and
another radiant wall (Figure 8) plus radiant floors serve as the
primary heating for this space with a second stage served by the
air handler for peak heating loads (see Figure 7 below).
Figure 7. Radiant heated north wall of the foyer.
showing second stage air outlet.
Figure 8. Finished radiant heated north wall of
the east side foyer. Picture taken from inside the foyer facing
north and looking up.
Figure 9. East facing radiant heated wall of the foyer. Picture
taken from inside entrance looking up and to the left.
Figure 10. Finished east facing radiant heated wall of the
foyer. Picture taken from inside entrance looking up and to the
left.
Figure 11. West view overlooking downtown
Calgary. Due to the high window/wall ratio this room heated with
radiant floors and walls to keep the fluid temperature down to
ensure maximum efficiency from the boiler.
Figure 11a. Make up air location #1 for kitchen
range hood. Second location for make up air is from floor and
wall registers in living room and foyer respectively.
Figure 11b. High capacity
kitchen range hood.
Figure 11c. Rendering of the north and west walls.
Credit: Nyhoff Architecture
Why I specify non electric thermostatic room
controls.
Still the worlds most perfect thermostat
(IMHO)...
The non-electric thermostatic controller valve
was invented over 70 years ago and its simplistic design is just
as reliable today as it was back in the day.
A few features:
*It has no power
*Batteries not required
*Self powered
*Was the first wireless stat
*Is fully modulating
*Senses operative temp.
*One (1) page IOM manual
*Works like a door knob
*Turn right for less heat
*Turn left for more heat
*Incredibly reliable
*Anyone can work it
*Stocked everywhere
*Perfect for reduced:
- manual dexterity
- visual acuity
- cognitive abilities
Perfect for grumpy designers and their clients
who are sick and tired of technology stealing away valuable
fishing time!
Computer modelling of solar dump using finite
element analysis (FEA).
Due to the output of solar collectors and
associated systems, it is sometimes necessary to "dump" the
excess heat. In this case we had the controls divert solar flow
to an underground loop when ever the storage tank reached 190°F(88°C).
Using flexPDE we set up a model to help us
understand the pipe/earth heat exchanger necessary to cool the
solar flow when the heat was not needed.
The following two images are screen shots from
the program outputs.
For other use of the FEA tool see our work on
under slab insulation and
wall insulations.
Though there are many radiant design software
programs available, we use our own spreadsheets based on the
ASHRAE Handbooks.
Screen shot for the radiant design summary.
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