RE:RE:RE:RE:RE:Cost to grow in cold Alberta TBH I would be more worried about the plague of hail storms the prarie provinces have had of the past 5 years than the temprature outside. With the greenhouses I have quoted and built here in Regna the most expensive cost was the cooling towers for summer. The air exhange and filter cost go WAY down in winter because of the colder tempratures.