ᐅ Heating a Garage: What Is the Best and Most Cost-Effective Solution?

Hello,

we are planning to build a house soon. The house will have a gas condensing boiler. Next to the house, there will be a large garage with an area of about 100m² (1,076 sq ft). I would like to keep the garage frost-free and occasionally heat my workshop to 15-17 degrees Celsius (59-63°F) during winter. What is the best and most cost-effective way to achieve this? Would it make sense to connect it to the gas condensing boiler? The buildings are exactly 5m (16 ft) apart.

Regards, Fabian

Can no one help me, or which forum could offer advice?

That depends on how long you plan to work there. Does the entire garage need to be heated, or just a small room inside it?

Apart from that, even without heating, the temperature in a closed garage won’t drop below freezing.

The hot water pipes will have to run partly outside and must definitely be well insulated.

Could an electric heater possibly be sufficient in this case?

The garage will naturally have several rooms. The heated area is about 50m² (540 ft²). Here, a workshop is planned that I can also occasionally heat (2-3 times a week). The supply line would be installed underground alongside the water line. What would be the most cost-effective solution? Should I connect everything to the existing gas boiler, or perhaps use electric heaters? Connecting to the gas boiler would seem best since it is already in place. Would underfloor heating be better, or panel radiators (due to low temperature)?

It depends on the insulation of the room. The worse the insulation, the more heating energy you will need.

If you have underfloor heating in the house, only underfloor heating will work in the garage as well, unless you install a second heating circuit with a higher flow temperature for a conventional radiator.

Alternatively, you could use electric heating.

Your heating installer can probably tell you which option will be the most cost-effective in the end.

The heating engineer wants to install standard radiators for me. However, since I have a low-temperature heating system, these will probably not be sufficient to heat the space properly, and they will also take up room where I won’t be able to place anything.