Are you ready to take the #IceBoxChallenge?

Using the sliders below, estimate the amount of ice that will remain in each Ice Box on October 9. Submit your name, phone number and email address for a chance to win. We will contact you if you are a winner.

Contest runs from October 4-9, 2017 (11:00am PT).

What can I win?

We are grateful to be able to give a prize of $475 to the winner of the contest.

Why $475?

This value is based on the performance standard of Passive House!  A Passive House building must be designed to have an annual heating and cooling demand of not more than 4.75 kiloBTUs per square foot per year.

The 4.75 kBTU/sf/year limit of heating energy for Passive House was set because this is the point at which the cost to install a traditional heating and cooling systems can be eliminated- In other words, the money invested is shifted from mechanical equipment to insulation, air tightness, high performance windows and heat recovery ventilation.

Contest Terms and Conditions

The Ice Box Challenge contest is hosted by Passive House California.


The Contest is open to individuals who are 18 years of age or older.

All entrants are required to submit their full legal name, telephone number and e-mail address. Selected winners may be required to provide proof of age and residency, to be deemed the official winners.

People directly associated with the production of Ice Box Challenge are not eligible to enter the Contest.

There is no fee to enter the Contest; no purchase is necessary.

The Contest is limited to one entry per person. Passive House California reserves the right to reject what it deems to be multiple entries form one person.

Selecting the Winning Entry

The winning entry will be determined by comparing the sum of each Contestant’s guesses for the final weight of the ice from both structures, to the actual weight of the combined remaining ice from the structures, at or about 8:00 a.m. Pacific time, October 9, 2017. The contestant whose entry has a combined weight of the remaining ice from both structures that is the closest to the actual combined weight of the remaining ice, as determined by the Ice Box Challenge team will be determined to be the winning entry.

In the event of a tie, the contestant’s entry that has the closest weight of the actual weight of the remaining ice in the Passive House structure will be deemed to be the winner. The Ice Box Team’s determination of the winning entries will be final and binding.

In the event that the winning contestants do not claim their prizes within 72 hours after being contacted by telephone and/or e-mail, Passive House California reserves the right to award the prize to runner up contestants.

Acceptance of Prizes

Prizes must be accepted as described in the Contest Terms and Conditions and cannot be transferred to another individual or substituted for another prize.

Substitution of a Prize

Passive House California reserves the right, in its sole and absolute discretion and for any reason whatsoever, to substitute a prize or any part thereof, with an alternate prize of equivalent or approximate value.

Odds of winning

The odds of winning will depend on the number of eligible entries received.


Passive House California, the Ice Box Team, and their designees are not responsible for any losses or damages resulting from the awarding of any of the prizes in the Contest, nor do they make any express or implied warranties of any kind with respect to safety or performance of any prize.

Release and Exclusion of Liability

By entering the Contest, each entrant agrees:

  1. a) To release, discharge, and forever hold harmless each of Passive House California, the Ice Box Team, and their designees and their respective officers, directors, employees, shareholders, agents and other representatives (collectively, the “Releasees”) from any and all claims, actions, damages, demands, manner of actions, causes of action, suits, debts, duties, accounts, bonds, covenants, warranties, indemnities, claims over, contracts and liabilities of whatever nature or kind arising out of, or in connection with the entrant’s entry, entrant’s participation or attempted participation in the Contest, compliance or noncompliance with the Contest Terms and Conditions and acceptance and use of any prize or subsequent prizes or any portion thereof

The Releasees will not be responsible for lost, incomplete, late or misdirected entries or for any failure of the Contest website or app during the contest period, or for any technical malfunction or other problems with, any telephone network or lines, computer on-line systems, servers, access providers, computer equipment or software or for any technical problems or traffic congestion on the Internet or at any website or app, or any combination of the foregoing, and will not be liable for any resulting injury, death or damage to any person or property arising from, or relating to, that person’s or any other person’s participation or attempted participation in the contest.

Any attempt to deliberately damage any website or app or to undermine the legitimate operation of this contest is a violation of criminal and civil laws and, should such an attempt be made, Passive House California reserves the right to seek remedies and damages to the fullest extent permitted by law, including criminal prosecution.

Consent to Use of Likeness

By submitting an entry to the Ice Box Challenge Contest, you understand that, during the course of or in connection with the Contest, photographs, video, and other recordings (the “Depictions”) may be taken of you, and your hereby grant Passive House California, the Ice Box Team, and their designees and licensees the right, in any and all manner and media throughout the world and in perpetuity, to disseminate, reproduce, record, exhibit, print and publish the Depictions, which may include your name, likeness, for any purpose, including, without limitation as news or informative matter and for advertising and publicizing Passive House California, the Ice Box Team, and their designees.