To avoid these ads, REGISTER NOW!

Heating/Cooling attached garage/workshop Northeast

doyle4281

Active member
Joined
Nov 3, 2012
Messages
37
Location
New Jersey
Hello guys, this is obviously a quite popular subject and has been covered many times, however I would like to get some suggestions as it relates to a common choice scenario.

My home is a typical New Jersey ranch, which happens to have an attached 3 car garage (800 sqft) The home is heated by a newly installed high efficiency condensing boiler, and is cooled by central A/C. Being that the garage is attached, one wall is shared with the house and is insulated, and I will be insulating the rest as extensively as I can. Now, I will be fully dedicating the garage as a workshop and would finally like to experience a climate controlled work environment. The Northeast experiences quite hot (95) to quite cold (10) temperatures, however I am intending on bringing those temperatures up/down to 70 degrees just to work. I really would just like to make the garage reasonably comfortable without a big hit to my utility bills.

Options:
-Initially, I was/am leaning towards a hydronic heating unit which is run off a zone of my high efficiency boiler. The house has a 110k btu (oversized) boiler which can handle another zone. These units are quite affordable ($500) and would be using the heat energy of my boiler when it is already running to heat my house. This seems like a great heating option, however does not not address cooling.

-Being that Ductless mini split systems are frequently discussed on this forum, this has become a strong option. I am not entirely caught up on my research of these units, however the installation seems straight forward aside from the need to get charged with refrigerant. My concern with these systems is the electrical costs monthly, as I am unfamiliar with the rate at which the consume amperage.

-the other option would be a combination of both
 
To avoid these ads, REGISTER NOW!

theoldwizard1

Well-known member
Joined
Feb 22, 2011
Messages
43,184
Location
SE MI
Seeing as you said cooling was a requirement, I would go with a mini-split. Most come pre-charged so that when you install the tubing it is set to go.

Were you planning on having hydronic on more than 1 wall ? That will also be you big decision with a mini-split, 1 or 2 air handlers.

Shop carefully as some mini-splits have a significance drop off in efficiency below about 32F while others will maintain 100% efficiency to around 5F.
 
To avoid these ads, REGISTER NOW!
OP
D

doyle4281

Active member
Joined
Nov 3, 2012
Messages
37
Location
New Jersey
Seeing as you said cooling was a requirement, I would go with a mini-split. Most come pre-charged so that when you install the tubing it is set to go.

Were you planning on having hydronic on more than 1 wall ? That will also be you big decision with a mini-split, 1 or 2 air handlers.

Shop carefully as some mini-splits have a significance drop off in efficiency below about 32F while others will maintain 100% efficiency to around 5F.

Yes, I hear Fujitsu, Mitsubishi, and Daikin are quite good, in that order. Being that I will be finishing the basement soon, I was considering getting a 2 zone mini split, to heat/cool both the garage and basement. The hydronic heater unit run off my boiler would be install in the corner of the garage by the ceiling. I was thinking between 18-24k btu. This is the cheapest option, as they are only $500, however the plumbing is the more labor intensive. I'll be doing the work either way, so I'm not too concerned about the labor. The heat is the priority, the A/C would be a luxury if the mini split systems are as efficient as people say
 
OP
D

doyle4281

Active member
Joined
Nov 3, 2012
Messages
37
Location
New Jersey
Okay guys, turns out I have access to a family contractor account locally, and I can get a Daikin unit for what seems to be a great price. 18 seer 24k unit with all installation accessories for $1600 plus tax. My issue now is, being sure of the BTU rating needed for a garage install. Aside from a heat loss analysis, are there any guidelines that are tailored to garage installs on the forum? The garage is 3 car attached, about 800 sqft. Walls/ceilings will be insulated, minimal windows, and will be upgrading the garage doors. Conventional calculators lead me to 24k BTU. I am expecting 70 degrees year round, I just want it to be tolerable in the worse parts of the summer and winter. In New Jersey, it goes from 0-100 from winter to summer, however assume winter heating from 30-40 degrees, and summer cooling from 90-95 degrees. Bring the temperature up or down 15 degrees would be acceptable to me.
 
To avoid these ads, REGISTER NOW!
Top Bottom