Suggestions For HVAC An Historic Apartment Building

232323

Existing steam heat has been abandon. No existing AC. Looking for options for a new heating and cooling system. This is a 2-story building, 20 apartments, flat roof, masonry construction. Extreme climate... 30 below winter---100 above summer. The units are individually metered for electricity...would like to have tenants pay their own utility's. Thanks for any suggestions.

beenthere

First company air handlers with hydro coils, A/c condensers on roof, and gas fired combination water heaters for domestic and heating water use.

flashheatingand

Might as well use h/p as opposed to straight a/c..

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flashheatingand

Are you planning to run gas lines to each unit? With extreme temps, it would be advisable, as I had a project in which the contractor bought an electric water heater for the hydro coils (75 gallon tank), it didn't work out too well.

No gas lines? Expect excessive utility bills during the heart of winter.

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232323

Are systems like Mitsubishi duct-less electric heating & cooling system worth considering?

beenthere

Not at -30.

BadgerBoilerMN

Naturally you have to start with the cost and availability of fuel.

Doc Holliday

furr down electric heat spilt systems. most apts have them at least down here but not sure how you'd configure then individually to the existing duct work you have unless each apt has it's own duct work.

plummen

Some sort of gas heat furnaces for emergency heat and heat pumps would be my guess also without seeing your building.
Going with straight electric furnaces would take a serious electric service to each apartment,and would basically be like living inside a toaster in my experiance around these parts anyway.
How bad is the boiler?

Jackfre

At 30 below the mini-splits are out. You could use a Rinnai water heater with their air handler for heat and hot water. You would have to add your own ac coil and condenser for ac. For straight heat I would suggest the Rinnai Energysaver. Gas fired direst vent, modulatng gas valve and blower, cool to the touch, simple installation. My old company just finshed 800 units in MA replacing individual boilers and savings were around 50%.

flashheatingand

Truth of the matter is I wouldn't advise the hydro units. The reason being is that should something go amiss with the coils and/or one needs a replacement, it's not a good situation, especially, if it's in the middle of a wicked cold spell.

If the building had steam radiant systems for 50+ years, I don't see why it was gutted in the first place. Just an idea... individual mini splits in the living room, and one central hydronic system for the whole complex.

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