This page recounts our own efforts to control the interior
temperature of our 4 door compact car
(a Suzuki SX4) in order to keep our mutt dog Sammy safe and comfortable while he patiently waits for us.
contact: craig er oochi a t outlook dotty com
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last worked on: December 31st, 2017
** My first thought: it seems an easy engineering task to design cars with ventilators --both low in the doors and high near the roofs, such that air convection would flow in proportion to the interior heat build up.
* Any related air valving that's electrically operated should default to open --or be lockably open (manually). This feature would also eliminate the nagging compromise between leaving your car securely locked up --and adequately ventilated. I see no good reason why closed motor vehicles should not have always had such a basic safety feature. (How many dead babies and pets does it take to bring about this change?)
* Going a step further: how about a switched option of thermostatically controlled forced ventilation? Car interiors are a small space and a modern muffin fan takes very little power --compared to the capacity of a vehicle battery.
* Unfortunately, our next car (purchased used --a 2008 Suzuki) had a lighter socket that turned off with the ignition --plus the doors can't be (electrically) locked with with accessory power left on. Consequently, we bought a "jumper box" (a lightweight portable battery unit with an internal charger) from an auto supply store --that has a cigarette lighter type receptacle (above photo). That way there's no concern about running a car's marginal battery down (even though the fan takes but trivial power).
* In order to be very sure this arrangement would work in our Suzuki, I troubled to graph the results.
* If you try this idea, be sure to prove to yourself that it and your methods work (in your car) before putting a pet at risk. (We just never leave little kids alone in the car --right?) When satisfied of its effectiveness, be sure to place a clearly written notice (or two) where concerned people will see it --stating that the dog is cool and comfortable. Include your cell phone number to use --in case anyone thinks otherwise --lest some do-gooder or policeman busts a side window in order to liberate your dog.
1/22/2017 update: It doesn't look like we'll ever again be going
to the fair (we're old and feeble, plus it's no fun for Sammy dog), and
it just doesn't get hot here (near the ocean), so I've not run anymore