The two compartments of the body must be maintained at appropriate levels for
the equipment and operator. The grooming compartment will be maintained at
"room" temperature during working hours. Both the working and equipment
compartments will be maintained at temperatures above freezing and below
equipment maximums of about 90 degrees Fahrenheit.
To start with the entire body is highly insulated. The ceiling
and doors of the body have an aluminum skin, 1.5" air space filled with
injected polyurethane foam insulation and covered internally with 3/4"
plywood. The walls are similar, but the outside skin is FRP; 3/8"
plywood with fiberglass bonded to both sides. The floor of the body is
1 1/2" thick hardwood with insulation below.
The step well of the side-entry door is also insulated. Below is a
picture of a section of the wall cut out during furnace installation.
We concluded with a Carrier AirV HC 15,000 BTU rooftop unit. There
seemed to be little to distinguish competitive products from manufacturers
in this market. One feature which tipped the choice to the Carrier
unit was the ease of interior filter removal/cleaning.
The Carrier unit has two thin strips which can be pulled out and wiped
off. Coleman units required removing two thumb screws to lower the
inside cover, then the removal and cleaning of foam filter material.
This is a very small consideration for anyone but a dog groomer.
This cooling capacity should be more than adequate for the 500 cubic foot volume of the
workspace. Some of the workspace air will be pushed into the equipment
compartment to keep electronic devices there within tolerance.
AirV Installation Manual
This turned out to be one of the more complex physical components to
design/install. We chose Atwood Mobile Products for the furnace and
water heaters. Atwood has two basic furnace systems. The Excalibur systems
require ductwork. Thanks to Chris Griffin at Atwood for assistance acquiring
and interpreting installation requirements for the furnace. In order
to guarantee proper airflow, four of the available output openings must be
used and 64 square inches of return air area must be provided.
To satisfy these requirements, a duct opens directly into the
grooming area under the bath tub, with a diverter to the bathroom. To provide return air, a large
opening is provided high in the partition above the bathtub and a smaller
opening in the bathroom. These
openings make the rear, equipment area part of the return air space. Details of the installation can be seen in the equipment room plan view and