Voucher cannot be redeemed until the day after deal closes. Expires 11/16/2012 May buy one voucher per person, and one additional as a gift.  One per person, per visit.  Extra fee applicable for more than one HVAC unit. Serving 40 miles outside of the Downtown Houston area. Must call to schedule an appointment. See the fine print that applies to all deals: http://bit.ly/Ajkwo0