get electric heaters with ''control ambient temperature'' function or even natural gas heaters with the same function (this way you will have production of CO2)...since electricity (no.of kW/h & bills) won't be such a big issue you can use many different types of appliances...why do you need to use the tomato business thing as a front? somehow i do not get it....if the police come into your property looking for drugs they will come with dogs...so, why would you get in so much trouble spending all that money in the first place?
Your idea however is good but i would do it somehow different.....inside the whole house....would make sure to use 3-4 rooms for flowering,1-2 for vegetation plus one more for mothers & cloning.....what is the capacity/ max power of the generators you have chosen? iw as kinda looking on ebay the other day for a generator and the most powerful ones found were able to have a max output of 5kW using diesel....i've also seen and a 20kw generator priced at around 3000 british pounds or so, diesel as well.....anyway....get one of these.....
for light i would have 3x1kw in every room i would use for flowering and vegetation and 2x400w for the mothers and the clones....all windows would be closed,insulated and covered from the inside with boards and mylar on top of that....i would also put one thick security door as main entrance to the house......
finally for ventilation i would use like you the blowers etc with carbon filters supplying with air the entire house...as for ambient controlling , the central heating is able to keep a stable temperature of 23 celcius all year round no matter what....at least gas is cheap......
within 4 months of operation i would be able to:
a)harvest every month
b)produce 100-150kg of dry bud every year using 3 rooms for flowering
c)retire within two years of continuous production

hope you get my grip

take care
newgroweroldsmoker Reviewed by newgroweroldsmoker on . Underground grow room construction!! Me and my partner are getting hold of a nice country property in the UK. Its quite secluded and has a large back garden. Now its not quite secluded enough to grow in green houses and we want a long term sucure grow room of a large capacity. Basicly in the house is no good and out doors is not what i want to to do. So What i want to do is eract some large green houses with decking floor inside and dig out my grow rooms underneath... I want to go big maybe 10K so im gona be using petrol Rating: 5