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I am sorry I just noticed you are from Canada. I have no idea where to locate them on-line for Canada. You do not have states.LOL

I do not know what state you live in but in Massachusetts if you go to www.massgov You can try to google your states government site and then you will have to naviagte through to find practice exams....

My brother, who knows a lot more about HVAC, said he could put another return.
I have a B.S in Civil Engineering but am out of work. He has me doing his office work and wants me to learn how to...

Thanks for the information.
I think you solved my problem. I am going to contact the Spacepak rep. and ask him if it would work. I think you are right, it will work. It might look a little weird but...

No, I can not replace any of the existing 7". I am connecting 9" to the existing sevens and pushing the unit as far back as possible in the 3rd floor attic. The 3rd floor is was remodeled. It was...

I had a Spacepak representative visit the property. He did the calculations with the 7" duct and said it would work but can not be zoned. We have to bump it up to 9" in order for it to work. We don't...

In Massachusetts some cities are now requiring Manual J calculations in order to get a permit.
However, you are not in MA.
I would make sure the contractor you hire has performed the calculations.

Thanks for the advice.
I would walk from the job but it is a friend of a client of ours that gives us a lot of work.
I am going to tell the owner I will only install the 3 ton system and explain...

Do you know of a company that makes a one ton system?

I talked to Spacepak and they make a one ton but it is different. You can't have a lot of duct, you need a chiller, and the representative...

New Member
Keep up the fight. Wish the best to you and your family.

I am bidding a high velocity job. The previous contractor was let go and we were referred to finish installing the handler and condenser. The owner has 1700 ft^2. Two 7" round pipes; one feeds the...

Thanks for the advice.
I have to do a heat load calculation for a home in Somerville, MA. The city requires the calculations to be done in order to obtain a permit.

I took thermodynamics, it was a required course in the C.E. program. I remember closed systems vs open, graphs for points of vapor etc., but not much more. Was Bernoli's (sp) equation used?

Hi
My name is Michelle. I joined this site to educate myself about HVAC. My brother owns a HVAC company and I now work for him.

I have a BS in Civil Engineering but do not know a lot about how...